Kia's midsize sedan shares its engine, and that engine's serious recall history, with the related Hyundai Sonata — the recall checklist on the shared engine page is not optional reading.
Kia and Hyundai share platforms, engines and much of their engineering under the same parent company, and this Optima's 2.4L is mechanically identical to the engine found in the contemporary Hyundai Sonata — including the same documented manufacturing defect and recall.
This generation falls squarely within the Theta II recall's affected production window, which makes the engine page's VIN-check guidance the single most important step before considering this car at all.
This is about the car itself — for engine-specific failure points, see the dedicated engine page below.
This Optima shares its 2.4L Theta II, and that engine's recall history, with the related Hyundai Sonata. The VIN recall check on the shared engine page is essential before considering this car.
FULL ENGINE BREAKDOWNHyundai Theta II 2.4L/2.0T — Reliable or Not →This is absolutely non-negotiable: check the vehicle's recall history by VIN before considering anything else about this car.
If the recall applies and shows as incomplete, do not proceed with the purchase until it is resolved.
Listen for a rod-knocking noise, particularly at idle, and treat any such noise as disqualifying regardless of price or seller claims.