Case file · KIA-OPTIMA-2016-2020 · Field document

Kia Optima 2016–2020 · Pre-purchase checklist

Bring this to the inspection. Every check below is specific to this generation's documented failure modes — not generic used-car advice.

1. Check 01

   Run the VIN at kia.com/us/en/recall (or NHTSA) and confirm every open recall is closed — especially the knock-sensor (KSDS) software on 2.4/2.0T cars and SC218 on 2017–2018 Hybrids/PHEVs.

2. Check 02

   Ask a Kia dealer to confirm by VIN that the KSDS update is installed — it's the condition for the lifetime short-block warranty under the Theta II class settlement.

3. Check 03

   Cold-start the engine yourself and listen for a rhythmic metallic knock from the bottom end at idle and on light throttle — the classic early rod-bearing symptom. Walk away from any knocker.

4. Check 04

   Check the dipstick and ask directly about oil consumption; on a test drive after full warm-up, watch for the oil-pressure light flickering at hot idle.

5. Check 05

   On the 1.6T, creep through a parking lot and crawl in stop-and-go both forward and in reverse — shudder, grabby engagement, or a long pause off the line means the dual-clutch needs work.

6. Check 06

   Cycle all four windows fully down and up a few times — slow, crooked, or dropping glass is the known regulator failure, most common on 2016s.

7. Check 07

   If the engine was ever replaced (common on these), confirm recall 18V-907 (fuel-pipe inspection after engine replacement) shows closed, and sniff for fuel smell in the engine bay.

8. Check 08

   Buy on maintenance records: a GDI Theta II that got 5k-mile oil changes is a different car from one that got 10k-mile ones.