2019–2021 Hyundai Kona: Engine knock, oil loss or stalling (2.0L piston rings)
Likely causes, ranked
- Piston oil rings$0–$0Shop
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: Knocking, oil loss or a stall, sometimes at low speed.
Likely causes
- Piston oil rings. Hyundai inspects and replaces the engine if needed. Kona Forum owners also report low-speed stalls fixed by VVT solenoid replacement.
DIY or shop?
Dealer. Recall repairs are free.
Useful steps
- Check your VIN for 21V301.
- Watch the oil level.
- Have stalling diagnosed if the recall doesn't apply.
Vehicle focus: 2019–2021 Hyundai Kona.
Safety / mechanic note
A stall while driving raises crash risk. Verify with a mechanic or dealer.
Recalls & service bulletins
Recalls
- 21V301000 Certain 2.0L Kona (and other Hyundai models) may have improperly heat-treated piston oil rings, which can cause engine damage and a stall. Dealers inspect and replace the engine if needed. Details
NHTSA complaints: 211 keyword-matched complaints for Hyundai KONA 2019–2021 (of 475 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.