2011–2014 Kia Optima: Engine knocking, stalling or seizing (2.4 GDI / 2.0T Theta II)
Likely causes, ranked
- Connecting rod bearing wearShop
Real-owner fix counts will appear here as reports come in.
DIY or shop: See DIY or shop section
Parts to check
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Symptom: A knocking that rises with RPM, loss of power, stalling, or the engine seizing, sometimes with oil light or check-engine light.
Likely causes
- Rod bearings. Optima Forums owners share failures, often between about 60,000 and 120,000 miles, even with regular oil changes. Kia's recall and warranty extension blame rod bearing wear.
DIY or shop?
Dealer. Check recall and warranty status first.
Useful steps
- Check your VIN for 17V224 and related campaigns.
- Stop driving and tow it if it knocks.
- Keep oil change receipts.
Vehicle focus: 2011–2014 Kia Optima.
Safety / mechanic note
A seizing engine can stall in traffic. Verify with a mechanic or dealer.
Recalls & service bulletins
Recalls
- 17V224000 Kia recall SC147 covers certain 2011–2014 Optima and 2012–2014 Sorento with 2.4L GDI or 2.0L turbo engines. Connecting rod bearings can wear and fail. Dealers inspect the engine and replace it if needed. Details
Technical service bulletins
- Optima engine warranty extension Kia extended short block coverage to 10 years/120,000 miles on 2011–2014 Optima 2.4 GDI and 2.0T engines for connecting rod bearing wear. Details
NHTSA complaints: 902 keyword-matched complaints for Kia OPTIMA 2011–2014 (of 3,470 unique complaints queried, NHTSA complaints API by model year, queried 2026-10-15).
Always check your VIN for open recalls at nhtsa.gov/recalls.
Sources
What actually fixed it?
Had this problem? Tell other owners what the real fix was. Reports are counted above; we never show made-up numbers.