NHTSA Complaint #11665441 — 2020 KIA OPTIMA

POWER TRAIN issue reported to NHTSA

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Complaint Details

ODI Number	11665441
Vehicle	2020 KIA OPTIMA
Component	POWER TRAIN
Date of Incident	June 6, 2025
Date Filed	June 7, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	GA

Consumer Description

2020 Kia Optima LX 2.4, LESS THAN 100,000 miles on car. Car started over consuming oil 2 quarts/1,000 miles. Cranked engine yesterday to go to work and serious knocking sounds, engine is rattling severely. Losing revving power, undriveable. Smoke coming out of exhaust that smells like rotten eggs. Will be taking this to get codes run but I believe this is due to Theta II engine failure issue reported in similar cars with the same engine. KIA NEEDS TO COVER THE 2020 OPTIMA UNDER LIFETIME WARRANTY PROTECTION otherwise this is a $10,000 cost to replace engine.

Related Complaints for the 2020 KIA OPTIMA

Other POWER TRAIN Complaints

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#11678832 — August 6, 2025 — The engine in my 2020 Kia Optima S (2.4L GDI Theta II) has been experiencing excessive oil consumption, engine knocki...

Recent Complaints for the 2020 KIA OPTIMA

#11715952 — AIR BAGS — February 5, 2026 — Stable track control failed to work, the driver seatbelt did not tighten & stayed loose, & air bags did not deploy up...

#11715952 — SEAT BELTS — February 5, 2026 — Stable track control failed to work, the driver seatbelt did not tighten & stayed loose, & air bags did not deploy up...

#11715952 — UNKNOWN OR OTHER — February 5, 2026 — Stable track control failed to work, the driver seatbelt did not tighten & stayed loose, & air bags did not deploy up...

#11714482 — ENGINE — January 30, 2026 — The contact owns a 2020 Kia Optima. The contact stated that the vehicle was sputtering and vibrating abnormally while...

#11714482 — ENGINE AND ENGINE COOLING — January 30, 2026 — The contact owns a 2020 Kia Optima. The contact stated that the vehicle was sputtering and vibrating abnormally while...