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.