# Kia Sorento 2016–2020 Problems, Engine Recall & Reliability

Canonical: https://carcasefile.com/vehicles/kia-sorento-2016-2020/

> Kia Sorento 2016–2020: Theta II engine failures and the lifetime warranty, the V6 head-bolt issue, real repair costs, and the safest years to buy used.

Case file · KIA-SORENTO-2016-2020 · 3rd gen (UM)

# Kia Sorento 2016–2020 Common problems, reliability & repair costs

The UM Sorento is a comfortable, well-equipped three-row crossover with an engine-lottery problem. The 2.4L (and 2.0T) Theta II four-cylinders can wear their rod bearings and seize, the defect behind Kia's engine recall on earlier years (NHTSA 17V224000 covers the 2012-2014 Sorento), the KSDS knock-sensor campaign, and a class-action settlement that put a lifetime warranty on 2016–2019 short blocks. Even the normally solid 3.3L V6 had a head-bolt problem in 2016–2017. Buy the right engine and year and it's a lot of family truck for the money.

[Shop Kia Sorento parts on Amazon →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%2BSorento%2Bparts) Verified part numbers below Affiliate link to Amazon. We may earn a commission if you buy. Your price is the same, and a commission never changes a verdict.

Case data plate KIA-SORENTO-2016-2020

Case score
5/10

Best years

2018–2020 with the 3.3L V6

Avoid

2016 (worst complaint year: Theta II failures plus early V6 +2 more

Status
Reviewed
Amended 2026-09-23

[How we score →](https://carcasefile.com/methodology/)

Exhibit A · Kia Sorento Makizox · [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0) · [Wikimedia](https://commons.wikimedia.org/wiki/File:2017_Kia_Sorento_KX-4_4X4_Automatic_2,2_Rear.jpg)

Case verdict At a glance

Case score
5/10

Best years

2018–2020 with the 3.3L V6

Years to avoid

2016 (worst complaint year: Theta II failures plus early V6 +2 more

Worst system

engine

#1 problem

**Theta II engine bearing failure / seizure (2.4L and 2.0T)** · $5,500–$9,500 at an independent shop · typically around 60k–120k mi

Companion pages for this car generation:

📄 Dossier Overview Active Page [📋 Inspection Checklist Field Guide ->](https://carcasefile.com/vehicles/kia-sorento-2016-2020/checklist/) [💰 Maintenance Costs 5-Year Ledger ->](https://carcasefile.com/vehicles/kia-sorento-2016-2020/cost-to-maintain/) [🩺 Audit a Quote Estimate Case File ->](https://carcasefile.com/estimate-doctor/?vehicle=Kia%20Sorento)

## Engines

- **G4KJ (Theta II GDI)** · 2.4L gasoline, 185 hp
- **G4KH (Theta II T-GDI)** · 2.0L turbo gasoline, 240 hp
- **G6DH (Lambda II GDI)** · 3.3L V6 gasoline, 290 hp

## Transmissions

- **automatic**, 6-speed
- **automatic**, 8-speed

## Drivetrain

FWD / AWD

## Body

suv

## Trims

L, LX, S, EX, SX, SX Limited (SXL)

Parts desk

## Kia Sorento part-number cross-reference

Start from the OEM number, then pick the brand you trust. Verified equivalents for the Kia Sorento (2016–2020).

Part links go to Amazon, and to eBay where Amazon does not stock the part.
Affiliate links, so we may earn a commission if you buy. Your price is
unchanged, and a commission never changes a verdict.

### Oil filter

2.4L G4KJ & 2.0L turbo G4KH (Theta II): spin-on canister
swipe →

OEM part
Kia/Mobis
[Find Kia/Mobis oil filter on Amazon](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B26300-35505)

Cross-ref Verified fit · 07.26

Wix

spin-on; direct Sorento application
[Look up Wix oil filter](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB000C9Y16S)

Cross-ref Verified fit · 07.26

Fram

Extra Guard; XG9688 Ultra / TG9688 Tough Guard are the same shell
[Check Fram oil filter](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DFram%2BPH9688)

Cross-ref Verified fit · 07.26

K&N
[See K&N oil filter](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB000C3YTM0)

Cross-ref Verified fit · 07.26

Purolator
[Compare Purolator oil filter](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB000C6KM6Y)

Cross-ref Verified fit · 07.26

Bosch
[Find Bosch oil filter](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB000BZGKCG)

Cross-ref Verified fit · 07.26

Mobil 1
[Look up Mobil 1 oil filter](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB072HK5THM)

Verified via: [KiaPartsNow OEM oil filter (26300-35504 → 35505, 2016-2020 2.0/2.4 Theta II)](https://www.kiapartsnow.com/oem-kia-sorento-oil_filter.html), [Go-Parts: Wix 51334 fits 2004-2020 Kia Sorento](https://www.go-parts.com/ps-product-new.php?sku=25A66E9&make=Kia&model=Sorento), [OilFilter-CrossReference: KIA 26300-35503 interchange (Fram PH9688, K&N HP-1004, Purolator L14459, Bosch 3312, Mobil M1-104)](https://www.oilfilter-crossreference.com/convert/KIA/26300-35503)

### Oil filter

3.3L V6 G6DH (Lambda II), 2016-2018: cartridge element
swipe →

OEM part
Kia/Mobis
[Check Kia/Mobis oil filter on Amazon](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B26320-3CAA0)

Cross-ref Verified fit · 07.26

Wix

cartridge; metal-free
[See Wix oil filter](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB01KHLKK38)

Cross-ref Verified fit · 07.26

Fram

cartridge
[Compare Fram oil filter](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DFram%2BCH10855)

Verified via: [Kia.Parts: 26320-3CAA0 oil filter, 2011-2018 Kia (incl. Sorento 3.3L)](https://www.kia.parts/oem-parts/kia-oil-filter-263203caa0), [Amazon FOCUSFILTER: 26320-3CAA0 replaces CH10855 / WL10164 (3.3/3.5L)](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2FFOCUSFILTER-26320-3CAA0-Compatible-Replaces-263203CAA0%2Fdp%2FB0FN7D99LN&raw=1), [OilFilter-CrossReference: KIA 26320-3CAA0 → Fram CH10855](https://www.oilfilter-crossreference.com/convert/KIA/26320-3CAA0)

### Oil filter

3.3L V6 G6DH (Lambda II), 2019-2020: cartridge element (revised service kit)
swipe →

OEM part
Kia/Mobis
[Find Kia/Mobis oil filter on Amazon, 3.3L](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B26320-3CKB0)

Cross-ref Verified fit · 07.26

Wix

cartridge; shared with Palisade/Telluride 3.8L Lambda II
[Look up Wix oil filter, 3.3L](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB00YBBCSP4)

Verified via: [KiaPartsNow: 26320-3CKB0 service kit fits 2019-2020 Sorento 3.3L (also Cadenza/Sedona/Telluride)](https://www.kiapartsnow.com/genuine/kia-service-kit-oil-filt~263203ckb0.html), [Amazon: Kia oil filter 26320-3CKB0 = Wix WL10033 (Genesis/Palisade/Sorento/Telluride)](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2F26320-3CKB0-WL10033-Genesis-Hyundai-Palisade%2Fdp%2FB09MT2NTL1&raw=1), [FinditParts: Wix WL10033 cross reference](https://www.finditparts.com/products/6579997/wix-filters-wl10033)

### Engine air filter

All engines (2.0L / 2.4L / 3.3L): shared airbox, 2016-2020
swipe →

OEM part
Kia/Mobis
[Check Kia/Mobis engine air filter on Amazon](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B28113-A9100)

Cross-ref Verified fit · 07.26

Wix
[See Wix engine air filter](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB019HXY524)

Cross-ref Verified fit · 07.26

Fram
[Compare Fram engine air filter](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB073VRS5NM)

Cross-ref Verified fit · 07.26

K&N

washable panel
[Find K&N engine air filter](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB08CLP7V2F)

Verified via: [KiaPartsNow OEM air filter: 28113-A9100 fits 2015-2020, all three engines](https://www.kiapartsnow.com/oem-kia-sorento-air_filter.html), [Kia.OEMPartsOnline: 28113-A9100 cross list (Wix WA10271, Fram CA11943)](https://kia.oempartsonline.com/oem-parts/kia-air-filter-28113a9100), [Amazon partszen: CA11943 engine air filter, Sorento 2.4/2.0/3.3 2016-2020](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fpartszen-28113-A9100-Engine-Sorento-2016-2020%2Fdp%2FB0CSN5THBW&raw=1)

### Cabin air filter

All engines/trims, 2016-2020 (shared HVAC)
swipe →

OEM part
Kia/Mobis

superseded by C6C79-AC000
[Look up Kia/Mobis cabin air filter on Amazon](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B97134-C6900)

Cross-ref Verified fit · 07.26

Wix
[Check Wix cabin air filter](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DWix%2BWP10207)

Cross-ref Verified fit · 07.26

Fram
[See Fram cabin air filter](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB07B1CYJQF)

Cross-ref Verified fit · 07.26

Hastings
[Compare Hastings cabin air filter](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DHastings%2BAF1724)

Verified via: [KiaPartsNow OEM cabin filter: 97134-C6900 (→ C6C79-AC000), 2015-2020 all engines](https://www.kiapartsnow.com/oem-kia-sorento-cabin_air_filter.html), [PartsGeek: Wix WP10207 cabin filter, 2016-2018 Sorento](https://www.partsgeek.com/pr9z75s-kia-sorento-cabin-air-filter.html), [AirFilter-CrossReference: KIA 97134C6900 → Hastings AF1724 / Hengst E6914LI](https://www.airfilter-crossreference.com/convert/KIA/97134C6900)

### Spark plugs

2.4L G4KJ Theta II AND 3.3L V6 G6DH Lambda II (shared plug)
swipe →

OEM part
Kia/Mobis

iridium; same plug used on Palisade/Telluride Lambda II family
[Find Kia/Mobis spark plugs on Amazon](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B18849-11070)

Cross-ref Verified fit · 07.26

NGK

laser iridium; qty 4 for 2.4L, qty 6 for 3.3L V6
[Look up NGK spark plugs](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB078H8KZZL)

Verified via: [KiaPartsNow OEM spark plug: 18849-11070 fits 2015-2020 Sorento 2.4L Theta II & 3.3L Lambda II](https://www.kiapartsnow.com/oem-kia-sorento-spark_plug.html), [Kia.Parts: 18849-11070 spark plug (2016-2025 Kia)](https://www.kia.parts/oem-parts/kia-spark-plug-1884911070), [Amazon: Genuine 18849-11070 = NGK SILZKR7E11 (Hyundai/Kia)](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB08LH69S9W&raw=1)

### Spark plugs

2.0L turbo G4KH Theta II T-GDI ONLY (2016-2018): colder plug
swipe →

OEM part
Kia/Mobis

supersedes 18849-09075; qty 4; do NOT use the 18849-11070 N/A plug
[Check Kia/Mobis spark plugs on Amazon](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B18849-09085)

Cross-ref Verified fit · 07.26

NGK

laser iridium; NGK stock no. 92422; heat range 8 (colder than the N/A engines' 7)
[See NGK spark plugs](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DNGK%2BSILZKR8E9G)

Verified via: [KiaPartsNow OEM spark plug: 18849-09085 fits 2015-2018 Sorento 2.0L turbo Theta II](https://www.kiapartsnow.com/oem-kia-sorento-spark_plug.html), [Kia.Parts: 18849-09085 spark plug (2011-2022 Kia turbo)](https://www.kia.parts/oem-parts/kia-spark-plug-1884909085), [MAPerformance / NewParts: NGK 92422 = SILZKR8E9G laser iridium (Hyundai/Kia 2.0T)](https://newparts.com/product/ngk/92422)

### Front brake pads

All engines/trims, 2016-2020
swipe →

OEM part
Kia/Mobis
[Compare Kia/Mobis front brake pads on Amazon](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B58101-C6A00)

Cross-ref Verified fit · 07.26

Akebono

ProACT ceramic; Akebono is the OE pad supplier
[Find Akebono front brake pads](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB07D4Z1H1D)

Cross-ref Verified fit · 07.26

Wagner

ceramic
[Look up Wagner front brake pads](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DWagner%2BOEX1815)

Verified via: [Kia.Parts: front brake pads 58101-C6A00, 2016-2020 Sorento](https://www.kia.parts/oem-parts/kia-brake-pads-front-58101c6a00), [Walmart: Akebono ProACT ACT1815 fits 2015-2020 Kia Sorento](https://www.walmart.com/ip/Akebono-ProACT-ACT1815-Ultra-Premium-Ceramic-Disc-Brake-Pads-Fits-select-2015-2020-KIA-SORENTO/166272883), [NewParts: Akebono ACT1815 front ceramic set (Kia Sorento)](https://newparts.com/product/akebono-proact/ACT1815)

### Wiper blades

All trims, 2016-2020 (beam blades)
swipe →

OEM part
OE size
[Check OE size wiper blades on Amazon](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DOE%2Bsize%2B26%2Bin%2Bdriver%2B%252F%2B16%2Bin%2Bpassenger%2B%252F%2B12%2Bin%2Brear)

Cross-ref Verified fit · 07.26

Trico

rear exact-fit blade for 2016-2020 Sorento
[See Trico wiper blades](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB001KS0M5O)

Cross-ref Verified fit · 07.26

Bosch/Rain-X/Trico

any quality beam blade in these sizes fits the front
[Compare Bosch/Rain-X/Trico wiper blades](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DBosch%252FRain-X%252FTrico%2B26%2Bin%2B%252B%2B16%2Bin%2Bbeam)

Verified via: [WiperSizeChart, 2016 Kia Sorento: 26 in / 16 in front, 12 in rear](https://wipersizechart.com/make/kia/sorento/2016), [Windy Company: Kia Sorento wiper sizes](https://windywipers.com/blogs/wipers/what-size-windshield-wiper-blades-for-kia-sorento), [Walmart: Trico rear wiper 12 in, 2016-2020 Kia Sorento](https://www.walmart.com/ip/Rear-Wiper-Blade-Compatible-with-2016-2020-Kia-Sorento-2017-2018-2019/2201132390)

### Serpentine belt (main accessory)

2.4L & 2.0L turbo Theta II: alternator/A-C belt
swipe →

OEM part
Kia/Mobis

V-ribbed accessory belt
[Find Kia/Mobis serpentine belt on Amazon](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B25212-2GGA1)

Cross-ref Verified fit · 07.26

Bando

6-rib, 1010 mm
[Look up Bando serpentine belt](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DBando%2B6PK1010A)

Verified via: [KiaPartsNow OEM serpentine belt: 25212-2GGA1/2GGB0, 2015-2020 Sorento 2.0/2.4 Theta II](https://www.kiapartsnow.com/oem-kia-sorento-serpentine_belt.html), [PartsGeek: Bando 6PK1010A accessory drive belt, 2016-2020 Sorento](https://www.partsgeek.com/tbf6x9v-kia-sorento-accessory-drive-belt.html)

### Water-pump belt (stretch-fit)

2.4L & 2.0L turbo Theta II ONLY: separate stretch belt drives the water pump (no tensioner; needs stretch-fit tool)
swipe →

OEM part
Kia/Mobis

Kia catalogs this as Water Pump Belt (crank-to-water-pump); distinct from the 25212-2GGA1 accessory belt
[Check Kia/Mobis water-pump belt on Amazon](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B25212-2GGB0)

Cross-ref Verified fit · 07.26

Gates

Stretch Fit Micro-V; self-tensioning; cross-refs OE 25212-2GGB0
[See Gates water-pump belt](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB071DKBQG4)

Verified via: [Kia.Parts: Water Pump Belt 25212-2GGB0, 2016-2022 Kia (Sorento 2.0/2.4)](https://www.kia.parts/oem-parts/kia-water-pump-belt-252122ggb0), [PartCatalog: Gates K030303SF cross-refs OE 25212-2GGB0; fits 2016-2020 Sorento 2.0/2.4 water pump](https://www.partcatalog.com/products/gates-k030303sf-serpentine-belt), [SixityAuto: Gates Stretch Fit Micro-V water-pump belt, 2016-2019 Sorento 2.0L/2.4L L4](https://www.sixityauto.com/gates-stretch-fit-micro-v-water-pump-serpentine-belt-for-2016-2019-kia-sorento-2-0l-2-4l-l4-2020052766.html)

### Serpentine belt

3.3L V6 Lambda II, 2016-2018: single belt (drives water pump too)
swipe →

OEM part
Kia/Mobis

related no. 25212-3C321
[Compare Kia/Mobis serpentine belt on Amazon](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B25212-3C322)

Cross-ref Verified fit · 07.26

Gates

6-rib Micro-V, 1899 mm
[Find Gates serpentine belt](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB000C2WL0S)

Verified via: [Kia.Parts: 25212-3C322 serpentine belt, 2015-2018 Sorento 3.3L](https://www.kia.parts/oem-parts/kia-serpentine-belt-252123c322), [Walmart: Gates K060747 fits 2016-2018 Kia Sorento](https://www.walmart.com/ip/Gates-K060747-Serpentine-Belt-Fits-select-2016-2018-KIA-SORENTO-2020-2022-GMC-SIERRA/42732106)

### Serpentine belt

3.3L V6 Lambda II, 2019-2020: revised belt (2019 refresh, 8-speed)
swipe →

OEM part
Kia/Mobis
[Look up Kia/Mobis serpentine belt on Amazon](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B25212-3LAA0)

Cross-ref Verified fit · 07.26

Gates

Gates/Dayco list a 2019-2020 V6 belt; verify exact number by VIN. It differs from the 2016-2018 K060747
[Check Gates serpentine belt](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DGates%2BMicro-V%2B%2528K06%2Bseries%2529)

Verified via: [KiaPartsNow OEM drive belt: 25212-3LAA0 for 2019-2020 Sorento 3.3L Lambda II](https://www.kiapartsnow.com/oem-kia-sorento-drive_belt.html), [SixityAuto: Gates Micro-V serpentine belt, 2019 Kia Sorento 3.3L V6](https://www.sixityauto.com/gates-micro-v-serpentine-belt-for-2019-kia-sorento-3-3l-v6-2020052767.html)

### Battery

All engines (2.0L / 2.4L / 3.3L), 2016-2020
swipe →

OEM part
BCI group

same group across all engines; approx 760-850 CCA
[See BCI group battery on Amazon](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DBCI%2Bgroup%2B94R%2B%252F%2BH7)

Cross-ref Verified fit · 07.26

Any Group 94R/H7

flooded or AGM; e.g. ACDelco 94RAGM, Interstate MTZ-94R/MTP-94R, Duralast H7-AGM
[Compare Any Group 94R/H7 battery](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DAny%2BGroup%2B94R%252FH7%2BH7%2B%252894R%2529)

Verified via: [AutoPadre battery-size guide: 2016-2020 Sorento H7 (94R) regardless of engine](https://www.autopadre.com/battery-size/kia-sorento), [PowerTex: 2017 Kia Sorento BCI Group 94R / H7](https://powertexbatteries.com/products/2017-kia-sorento-car-battery-bci-group-94r-h7-lithium-lifepo4-automotive-battery)

Amazon and eBay affiliate links. Prices unchanged for you. Confirm fitment against your VIN; mid-generation changes exist.

Verdict

## Should I buy a 2016–2020 Kia Sorento?

Buy the V6, ideally a 2018–2020, and the UM Sorento is a genuinely good used family hauler: comfortable, well-equipped, and cheap for what it is. The 2.4L and 2.0T Theta II fours are the gamble. Rod-bearing wear can kill them without much warning, which is why Kia installed knock-sensor software (KSDS) and a class-action settlement extended the short-block warranty to lifetime on 2016–2019 cars that got the update. A Theta II car with the KSDS update done and documentation in hand is a defensible budget buy precisely because of that warranty; a 2020 2.4L has no settlement coverage, and a 2016–2017 V6 needs its head-gasket history checked. Verify the campaign status by VIN before money changes hands.

Best years

2018–2020 with the 3.3L V6

Years to avoid

2016 (worst complaint year: Theta II failures plus early V6 head-bolt issue), 2020 with the 2.4L (Theta II risk but outside the settlement class), Any 2.4L/2.0T without proof of the KSDS update

Inspection Companion

### Pre-Purchase Checklist for Kia Sorento

[Open Field Checklist Page ->](https://carcasefile.com/vehicles/kia-sorento-2016-2020/checklist/)

- ☐ Run the VIN at a Kia dealer (or owners.kia.com/us/en/recalls.html) for open recalls and campaign status, especially the KSDS knock-sensor update and, on replaced engines in 2016-2017 cars, the SC172 high-pressure fuel pipe recall.
- ☐ On 2.4L/2.0T cars: ask directly whether the engine was ever replaced under warranty or the KSDS campaign. A documented Kia replacement engine, with the fuel-pipe recall done on a 2016-2017, is a plus, not a minus.
- ☐ Cold-start the engine yourself and listen for a deep knock or rattle from the bottom end, the classic Theta II rod-bearing noise. Walk away if you hear it.
- ☐ Check the oil level and condition on the dipstick. A low level on a 'just serviced' car suggests it's burning oil, the known precursor to bearing failure.
- ☐ On a 2017 V6, confirm by VIN that recall SC153 (NHTSA 17V586000, crankshaft) is done.
- ☐ On 2016–2017 V6 cars: check for coolant loss, white exhaust smoke, or a sweet smell (the head-bolt/head-gasket issue) and ask whether the WTY035 extended-warranty inspection or repair was done.
- ☐ Verify both low-beam headlights work and look for melted or discolored bulb connectors. Repeat low-beam burnout is a known Kia electrical quirk.
- ☐ On the highway test drive, note whether the car tracks straight or wanders and needs constant correction.
- ☐ On 2019–2020 V6 cars, confirm the 8-speed shifts cleanly through all gears with no flare or harsh downshifts.

Verified-fit parts for the Kia Sorento (2016–2020).

Parts desk

Parts cross-reference

OEM number first, verified equivalents below it. Links go to Amazon.

Oil filter

2.4L G4KJ & 2.0L turbo G4KH (Theta II): spin-on canister

- [OEM Kia/Mobis 26300-35505 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B26300-35505)
- [Wix 51334 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB000C9Y16S)
- [Fram PH9688 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DFram%2BPH9688)
- [K&N HP-1004 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB000C3YTM0)
- [Purolator L14459 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB000C6KM6Y)
- [Bosch 3312 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB000BZGKCG)
- [Mobil 1 M1-104A →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB072HK5THM)

Oil filter

3.3L V6 G6DH (Lambda II), 2016-2018: cartridge element

- [OEM Kia/Mobis 26320-3CAA0 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B26320-3CAA0)
- [Wix WL10164 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB01KHLKK38)
- [Fram CH10855 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DFram%2BCH10855)

Oil filter

3.3L V6 G6DH (Lambda II), 2019-2020: cartridge element (revised service kit)

- [OEM Kia/Mobis 26320-3CKB0 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B26320-3CKB0)
- [Wix WL10033 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB00YBBCSP4)

Engine air filter

All engines (2.0L / 2.4L / 3.3L): shared airbox, 2016-2020

- [OEM Kia/Mobis 28113-A9100 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B28113-A9100)
- [Wix WA10271 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB019HXY524)
- [Fram CA11943 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB073VRS5NM)
- [K&N 33-5075 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB08CLP7V2F)

Cabin air filter

All engines/trims, 2016-2020 (shared HVAC)

- [OEM Kia/Mobis 97134-C6900 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B97134-C6900)
- [Wix WP10207 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DWix%2BWP10207)
- [Fram CF12161 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB07B1CYJQF)
- [Hastings AF1724 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DHastings%2BAF1724)

Spark plugs

2.4L G4KJ Theta II AND 3.3L V6 G6DH Lambda II (shared plug)

- [OEM Kia/Mobis 18849-11070 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B18849-11070)
- [NGK SILZKR7E11 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB078H8KZZL)

Spark plugs

2.0L turbo G4KH Theta II T-GDI ONLY (2016-2018): colder plug

- [OEM Kia/Mobis 18849-09085 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B18849-09085)
- [NGK SILZKR8E9G →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DNGK%2BSILZKR8E9G)

Front brake pads

All engines/trims, 2016-2020

- [OEM Kia/Mobis 58101-C6A00 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B58101-C6A00)
- [Akebono ACT1815 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB07D4Z1H1D)
- [Wagner OEX1815 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DWagner%2BOEX1815)

Wiper blades

All trims, 2016-2020 (beam blades)

- [OEM OE size 26 in driver / 16 in passenger / 12 in rear →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DOE%2Bsize%2B26%2Bin%2Bdriver%2B%252F%2B16%2Bin%2Bpassenger%2B%252F%2B12%2Bin%2Brear)
- [Trico Exact-Fit rear 12 in →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB001KS0M5O)
- [Bosch/Rain-X/Trico 26 in + 16 in beam →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DBosch%252FRain-X%252FTrico%2B26%2Bin%2B%252B%2B16%2Bin%2Bbeam)

Serpentine belt (main accessory)

2.4L & 2.0L turbo Theta II: alternator/A-C belt

- [OEM Kia/Mobis 25212-2GGA1 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B25212-2GGA1)
- [Bando 6PK1010A →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DBando%2B6PK1010A)

Water-pump belt (stretch-fit)

2.4L & 2.0L turbo Theta II ONLY: separate stretch belt drives the water pump (no tensioner; needs stretch-fit tool)

- [OEM Kia/Mobis 25212-2GGB0 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B25212-2GGB0)
- [Gates K030303SF →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB071DKBQG4)

Serpentine belt

3.3L V6 Lambda II, 2016-2018: single belt (drives water pump too)

- [OEM Kia/Mobis 25212-3C322 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B25212-3C322)
- [Gates K060747 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fdp%2FB000C2WL0S)

Serpentine belt

3.3L V6 Lambda II, 2019-2020: revised belt (2019 refresh, 8-speed)

- [OEM Kia/Mobis 25212-3LAA0 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DKia%252FMobis%2B25212-3LAA0)
- [Gates Micro-V (K06 series) →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DGates%2BMicro-V%2B%2528K06%2Bseries%2529)

Battery

All engines (2.0L / 2.4L / 3.3L), 2016-2020

- [OEM BCI group 94R / H7 →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DBCI%2Bgroup%2B94R%2B%252F%2BH7)
- [Any Group 94R/H7 H7 (94R) →](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3DAny%2BGroup%2B94R%252FH7%2BH7%2B%252894R%2529)

Confirm fitment against your VIN. Mid-generation changes exist. Affiliate links. We may earn a commission at no cost to you.

Known faults

## Common Kia Sorento problems & repair costs

### Theta II engine bearing failure / seizure (2.4L and 2.0T)

$5,500–$9,500

engine safety 2016–2020 (2.4L); 2016–2018 (2.0T) ~60k–120k mi

**Symptoms:** Metallic knocking or rod knock from the bottom end (often on cold start first), check-engine or oil-pressure light, sudden loss of power, or the engine simply seizing, sometimes while driving. Bearing debris can also lead to non-collision engine fires, which is why NHTSA treated this as a safety issue.

**Fix:** Full engine (short block) replacement. Kia's KSDS knock-sensor software update detects early bearing wear and derates the engine so you can get it in before it grenades. Under the class-action settlement, 2016–2019 Sorentos with the 2.4L GDI or 2.0T that have the KSDS update carry a lifetime warranty on the short block, so a qualifying failure should cost you nothing at a Kia dealer. The 2020 model year is outside the settlement class. Note: on 2016-2017 cars, engines replaced under warranty or the KSDS campaign were later recalled (SC172, NHTSA 18V907000) to inspect the high-pressure fuel pipe, which could leak fuel and start a fire if mis-installed during the swap.

Sources: [Kia Engine Settlement: official FAQ (covered vehicles, lifetime warranty, KSDS)](https://www.kiaenginesettlement.com/Home/FAQ), [ClassAction.org: Hyundai/Kia engine failure settlements](https://www.classaction.org/blog/new-hyundai-kia-engine-failure-settlement-covers-2m-additional-vehicles), [CarComplaints: 2016 Kia Sorento engine problems](https://www.carcomplaints.com/Kia/Sorento/2016/), [NHTSA: Kia Sorento recalls and complaints](https://www.nhtsa.gov/vehicle/2016/KIA/SORENTO)

### Excessive oil consumption (Theta II 2.4L / 2.0T)

$2,500–$6,500

engine severe 2016–2020 ~70k–110k mi

**Symptoms:** Oil level drops noticeably between changes, sometimes a quart every 1,000 miles or less, with no visible leak and no blue smoke early on. Owners often discover it only when the oil light comes on.

**Fix:** This is usually the opening act of the bearing/ring problem above, not a separate disease. Document consumption with dated oil-level photos, then push Kia for an oil-consumption test; cars that fail can qualify for engine replacement under the settlement's lifetime short-block warranty (2016–2019 with KSDS done). Out of pocket, the fix is rings or a replacement engine. In the meantime: check the dipstick every fill-up. Running it low is what kills the bearings.

Sources: [CarComplaints: 2017 Kia Sorento engine problems (oil consumption)](https://www.carcomplaints.com/Kia/Sorento/2017/), [Kia Engine Settlement: official FAQ](https://www.kiaenginesettlement.com/Home/FAQ)

### 3.3L V6 head-bolt stretch / head-gasket failure

$3,000–$8,000

engine severe 2016–2017 (rate drops sharply 2018+) ~100k–150k mi

**Symptoms:** Coolant loss with no obvious external leak, overheating, white smoke from the exhaust, milky oil in bad cases. Often little warning before the temperature spikes.

**Fix:** Head bolts in the aluminum block could stretch or pull threads, letting the head gasket fail. Kia logged thousands of warranty claims, NHTSA opened an investigation in late 2023, and Kia issued extended-warranty campaign WTY035 covering 2016–2017 Sorento 3.3L engines for 15 years/180,000 miles. Kia deepened the head-bolt thread engagement in production during 2017, and 2018–2020 engines fail at a fraction of the earlier rate. If a 2016–2017 V6 overheats or loses coolant, go to a Kia dealer and cite WTY035 before paying an independent shop for a head-gasket job or used engine. Separately, recall SC153 (NHTSA 17V586000) covers certain 2017 Sorento 3.3L engines whose crankshaft may have been improperly heat treated and may fail. Dealers inspect the crankshaft and replace the engine sub assembly as needed.

Sources: [Kia Forum: US Sorento 3.3L engine failure / head bolt issue](https://www.kia-forums.com/threads/us-sorento-with-the-3-3l-v6-engine-failure-head-bolt-issue.365313/), [Valero Law: NHTSA opens investigation into Sorento 3.3L Lambda II](https://www.valerolaw.com/news/2024/7/29/wrue9lwe7qyx1pzz5ikjzksk39ada3), [autoevolution: Feds investigate Kia Sorento Lambda II 3.3L power loss](https://www.autoevolution.com/news/feds-investigate-kia-sorento-with-lambda-ii-33l-v6-over-motive-power-loss-allegations-224778.html), [NHTSA: recall 17V586000 (Kia SC153), 2017 Sorento 3.3L crankshaft](https://api.nhtsa.gov/recalls/recallsByVehicle?make=KIA&model=SORENTO&modelYear=2017)

### Low-beam headlight bulbs burn out repeatedly

$20–$300

electrical minor 2016–2020

**Symptoms:** Halogen low beams fail every few months instead of every few years, often one side at a time. In worse cases the bulb connector overheats and the terminals melt.

**Fix:** A long-running Kia complaint: always-on DRLs plus voltage surge at startup cook the bulbs, and an overheating connector makes it worse. The cheap fix is a quality halogen bulb (a 15-minute DIY; see repairs below). If the socket shows melted plastic, replace the pigtail/connector; Kia's updated harness adds a resistor to the circuit. Inspect the connector any time a bulb fails early.

Sources: [ClassAction.org: Kia headlight problems overview](https://www.classaction.org/kia-headlight-problems-lawsuits), [Kia Sorento Forum: headlights keep burning out](https://www.tapatalk.com/groups/kiasorentoforum/headlights-keep-burning-out-t1083.html)

### Steering wander at highway speed

$100–$1,500

steering moderate 2016–2018 (most reported) ~under 30k mi (often from new)

**Symptoms:** The car doesn't track straight on the highway and needs constant small corrections; feels twitchy or vague on-center. Reported from low mileage, so it's not simple wear.

**Fix:** Start cheap: alignment to the tight end of spec and a check for uneven tire wear. Some owners got relief from dealer steering-software (MDPS) recalibration; a minority ended up in steering couplers or, rarely, a rack. Drive any UM Sorento at 65+ mph before buying and judge for yourself. Some cars have it, many don't.

Sources: [CarComplaints: 2017 Kia Sorento steering complaints](https://www.carcomplaints.com/Kia/Sorento/2017/)

A UM Sorento with a healthy engine is unremarkable to own: brakes, tires, fluids, and the odd bulb or sensor. The whole cost picture hinges on the engine. A 2016–2019 Theta II car with KSDS done shifts catastrophic engine cost onto Kia's lifetime short-block warranty, but expect dealer visits and paperwork if you ever claim it. A 2020 2.4L or any Theta II without the update means you're self-insuring against a $5,500–$9,500 engine. The V6 costs a little more in gas and is the cheaper engine to live with long-term, especially 2018+. Budget normally otherwise; parts are reasonably priced and independent shops know these cars well.

Cost calculator

### What will this Kia Sorento cost you by a given mileage?

Drag to a mileage. We total the documented problems whose typical onset falls at or before it. The same cost ranges listed above, nothing new invented.

100k mi

$0 estimated repair range

Ownership Costs
5-Year Maintenance Schedule & Cost to Own

Every scheduled service by mileage, fluid capacities, independent shop ranges, and parts cross-references.

[Open 5-Year Ledger ->](https://carcasefile.com/vehicles/kia-sorento-2016-2020/cost-to-maintain/)

🩺
Have a repair quote for this Kia Sorento?

Audit against OEM book times, uncover duplicate pad and rotor labor, and verify parts markups.

[Audit Repair Estimate ->](https://carcasefile.com/estimate-doctor/?vehicle=Kia%20Sorento)

DIY repairs

## How to fix common Kia Sorento problems (DIY)

### Replace a low-beam headlight bulb (and inspect the connector)

easy 20–30 min saves ~$50–$120

**Tools:** Nitrile gloves (don't touch halogen glass bare-handed), Flashlight

- Open the hood and locate the round dust cap on the back of the headlight housing; on the driver's side you may need to nudge intake ducting aside for hand room.
- Twist off the dust cap, unplug the connector, and release the bulb (twist-lock on these housings).
- Inspect the connector closely. Browned, melted, or brittle plastic means the pigtail should be replaced, not just the bulb.
- Install the new bulb with gloves on, seat it fully, reconnect, and refit the dust cap.
- Test low beams, high beams, and DRLs before closing the hood.

Parts

- [Low-beam bulb (H7 on 2016-2017 and 2019-2020, the 2018 book prints H11; HID and LED trims differ, check the bulb you pull)](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3D2016-2020%2Bkia%2Bsorento%2Blow%2Bbeam%2Bheadlight%2Bbulb) · Amazon $15–$30
- [Headlight bulb connector pigtail (if melted)](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3Dkia%2Bsorento%2Blow%2Bbeam%2Bheadlight%2Bconnector%2Bpigtail) · Amazon $10–$20

### Oil and filter change (with an oil-consumption log)

easy 45 min–1 hr saves ~$60–$130

**Tools:** Floor jack + jack stands or ramps, Oil drain pan, Socket set (17mm drain plug), Oil filter wrench, Funnel

- Warm the engine briefly, raise the front of the vehicle securely, and place the drain pan under the plug.
- Remove the drain plug, drain fully, and reinstall with a new crush washer, snug. Don't gorilla it.
- Replace the oil filter, lightly oiling the new gasket first.
- Refill with the spec amount. 2.4L: 5.07 qt, 5W-20 or 5W-30. 2.0T (2016-2018): 5.07 qt, 5W-30. V6: 6.02 qt (2016-2017) or 6.87 qt (2018-2020), 5W-30. Then check the dipstick.
- Start the engine, check for leaks, re-check the level after it sits.
- On any Theta II car: photograph the dipstick with a dated phone photo now and at every fill-up. That log is your evidence if you ever need Kia to honor an oil-consumption claim.

Parts

- [Oil filter, 2.4L (2016-2020) and 2.0T (2016-2018): spin-on 26300-35505](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3Dkia%2B26300-35505%2Boil%2Bfilter) · Amazon $5–$12
- [Oil filter, 3.3L V6 (2016-2018): cartridge 26320-3CAA0](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3Dkia%2B26320-3CAA0%2Boil%2Bfilter) · Amazon $5–$12
- [Oil filter, 3.3L V6 (2019-2020): cartridge 26320-3CKB0](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3Dkia%2B26320-3CKB0%2Boil%2Bfilter) · Amazon $5–$12
- [Full synthetic 5W-30 (5 qt 2.4L, 6-7 qt V6 by year)](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3Dfull%2Bsynthetic%2B5w-30%2Bmotor%2Boil%2B5%2Bquart) · Amazon $25–$40

### Cabin & engine air filter change

easy 20 min saves ~$60–$120

**Tools:** None (hands only; maybe a screwdriver for the airbox clips)

- Open the glovebox, unhook the damper arm, squeeze the side stops to drop it, and pull the cabin filter cover.
- Slide out the old cabin filter and insert the new one with the airflow arrow pointing the correct way (marked on the housing).
- For the engine filter, release the airbox clips, swap the panel filter, and re-clip the lid.
- Reset the glovebox stops and damper arm.

Parts

- [Cabin air filter (2016–2020 Sorento)](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3D2016-2020%2Bkia%2Bsorento%2Bcabin%2Bair%2Bfilter) · Amazon $10–$18
- [Engine air filter (2016–2020 Sorento)](https://carcasefile.com/go?u=https%3A%2F%2Fwww.amazon.com%2Fs%3Fk%3D2016-2020%2Bkia%2Bsorento%2Bengine%2Bair%2Bfilter) · Amazon $12–$25

Some parts links are affiliate links. We may earn a commission at no cost to you. We only list parts that fit this generation.

## The short version

The 2016–2020 Sorento (chassis code UM) is two very different used cars wearing the same body. With the 3.3L V6, especially 2018 and later, it’s a comfortable, well-equipped three-row crossover that will quietly do 200k miles. With the 2.4L or 2.0T Theta II four-cylinder, it’s a bet on Kia’s most infamous engine family: rod bearings can wear, knock, and seize, sometimes taking the whole engine (and occasionally starting a fire) with them.

Kia’s response was unusually large: an engine recall on earlier years, a knock-sensor software campaign (KSDS) that detects bearing wear early, and a class-action settlement that extends the short-block warranty to **lifetime** on 2016–2019 Theta II cars that have the update. That warranty is the single most important fact about this generation.

## What that means when you’re shopping

First question: **which engine?** If it’s the V6, your homework is the 2016–2017 head-bolt issue: check for coolant loss and overheating history, and know that Kia’s WTY035 campaign covers those two years for 15 years/180,000 miles. A 2018–2020 V6 (the 2019+ gets a nicer 8-speed automatic) is the clean recommendation.

If it’s a 2.4L or 2.0T, the deal lives or dies on paperwork. Have a Kia dealer run the VIN: KSDS update done? Engine ever replaced under warranty or the KSDS campaign? On a 2016-2017, fuel-pipe recall (SC172) completed after any replacement? A Theta II car with all boxes checked carries a lifetime short-block warranty, genuinely useful protection. A 2020 2.4L gets none of that settlement coverage, which is why we’d rather have a 2019.

On the test drive: listen to the cold start for knock, check the dipstick, confirm both low beams work (repeat bulb burnout is a known quirk), and see whether it tracks straight at highway speed.

## The one habit that saves these engines

Theta II failures are usually preceded by oil consumption. Whatever you buy, check the oil at every fill-up and keep dated dipstick photos. It’s a two-minute habit that both protects the bearings and builds the evidence file Kia will ask for if you ever claim the warranty.

**How this file is built:** failure modes and cost ranges are compiled from NHTSA complaint and recall data, the Kia engine settlement’s own terms, Kia warranty-extension campaigns, CarComplaints data, and owner-forum reporting, then sanity-checked against shop-floor experience. Cost figures are independent-shop estimates and vary by region. Spot something off? [Tell us](https://carcasefile.com/disclaimer/).

Myths, checked

## Viral car myths, checked against this car

Misleading

### [Is the "$1 Japanese oil trick" that stops engine wear forever real?](https://carcasefile.com/claims/1-dollar-japanese-oil-trick-mos2-engine-wear/)

The 'Japanese oil trick' is almost certainly MoS2 (molybdenum disulfide), a real industrial friction modifier. It is German, not Japanese (Liqui Moly popularized it), sold openly at every parts store for $15-20, has real but modest measured friction benefits, and was never buried by anyone.

Misleading

### [Is the "$2 liquid that stops any leak" really banned in 11 states?](https://carcasefile.com/claims/2-dollar-stop-leak-banned-11-states/)

Automotive stop-leak products are not banned in any US state. The products are real (Bar's Leaks, BlueDevil), they work in specific narrow situations, and they can permanently damage your cooling or oiling system if applied to the wrong leak.

Dangerous

### [Is the "$2 liquid that destroys engine sludge forever" real? Our shop-floor verdict.](https://carcasefile.com/claims/2-dollar-engine-sludge-destroyer-liquid/)

An aggressive solvent flush on a high-mileage engine is a textbook way to spin a bearing. The viral 'kitchen-cabinet flush' is folklore that real shops spend money cleaning up after.

Appendix

## Frequently asked questions

### Which 2016–2020 Kia Sorento years should I avoid?

2016 is the worst year. It has both the Theta II four-cylinder failures and the early V6 head-bolt problem. More useful than a year is the engine: any 2.4L or 2.0T without proof of the KSDS knock-sensor update is a gamble, and the 2020 2.4L sits outside the class-action settlement entirely. The safest pick is a 2018–2020 with the 3.3L V6.

### Does the Kia lifetime engine warranty cover my Sorento?

If it's a 2016–2019 with the 2.4L GDI or 2.0T Theta II and the KSDS knock-sensor software update has been installed, the class-action settlement extends the short-block warranty (block, crank, rods, bearings, pistons) to lifetime, regardless of mileage or how many owners the car has had. A Kia dealer can confirm campaign status by VIN. The 2020 model year and the 3.3L V6 are not part of that settlement. The V6 has its own WTY035 extension (15 yr/180k) for 2016–2017 head-bolt failures.

### Is the 2.4L Sorento safe to buy at all?

It can be, with paperwork. A 2016–2019 car with the KSDS update documented is effectively insured against the big failure by the lifetime short-block warranty, which is more protection than most used cars have. What you don't want is a Theta II car with no campaign history, an oil level that's mysteriously low, or any bottom-end noise on cold start. And check whether the engine was already replaced. A documented Kia replacement engine (on a 2016-2017, with the SC172 fuel-pipe recall done afterward) is a point in the car's favor.

### Is the V6 Sorento reliable?

Mostly yes, and it's the engine we'd pick, but 2016–2017 V6s can stretch head bolts and blow the head gasket, typically between 100k and 150k miles. Kia extended the warranty on those two years to 15 years/180,000 miles (campaign WTY035) after NHTSA started investigating. Kia fixed the bolt-thread design in production during 2017, so 2018–2020 V6s fail at a much lower rate.

### How many miles will a Kia Sorento UM last?

A V6 car, or a four-cylinder that survives (or gets a warranty replacement engine), will do 200,000 miles with routine care. The transmissions, AWD system, and body hold up fine. The honest answer for an unverified Theta II car is 'until the bearings say otherwise,' which is exactly why you check the campaign status and oil habits before buying.

Cross-reference

## Every Kia Sorento generation

The full case file run, beyond the generation before and after this one.

- [Kia Sorento 2011–2015 4/10](https://carcasefile.com/vehicles/kia-sorento-2011-2015/)
- [Kia Sorento 2021–2026 6/10](https://carcasefile.com/vehicles/kia-sorento-2021-2026/)

## Cross-shopped rivals

Files on what buyers weigh against the Kia Sorento of this era.

- [Honda Pilot 2016–2022 7/10](https://carcasefile.com/vehicles/honda-pilot-2016-2022/)
- [Ford Explorer 2011–2019 5/10](https://carcasefile.com/vehicles/ford-explorer-2011-2019/)
- [GMC Acadia 2017–2023 5/10](https://carcasefile.com/vehicles/gmc-acadia-2017-2023/)
- [Nissan Pathfinder 2017–2020 6/10](https://carcasefile.com/vehicles/nissan-pathfinder-2017-2020/)

## More Kia case files

- [Kia Optima 2016–2020 6/10](https://carcasefile.com/vehicles/kia-optima-2016-2020/)
- [Kia Soul 2010–2019 5/10](https://carcasefile.com/vehicles/kia-soul-2010-2019/)
- [Kia Telluride 2020–2025 7/10](https://carcasefile.com/vehicles/kia-telluride-2020-2025/)
- [Kia K5 2021–2026 7/10](https://carcasefile.com/vehicles/kia-k5-2021-2026/)

Spot an error in this case file?

Wrong cost, a fault we missed, or a part number that doesn't fit. Tell us and we'll fix it. See our [verification methodology](https://carcasefile.com/methodology/) and [corrections policy](https://carcasefile.com/disclaimer/).

Reviewed CarCaseFile editorial · filed 2026-07-03 · updated 2026-09-23

Cost figures are independent-shop estimates and vary by region and condition. Always confirm a diagnosis before authorizing repairs.