2017–2017 Hyundai Tucson: Engine knock, damage or stall (connecting rod bearing recall)
Likely causes, ranked
- Premature connecting rod bearing wear$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 from the engine, a check-engine or warning light, loss of power, or a stall. Some engines are damaged with little prior warning.
Likely causes
- Premature connecting rod bearing wear. Hyundai inspects the engine, replaces it when damaged, and installs KSDS monitoring software.
DIY or shop?
Dealer. Recall repairs are free.
Useful steps
- Check your VIN for 21V727.
- Stop driving and have it towed if you hear knocking or the oil pressure/engine warning comes on.
Vehicle focus: 2017–2017 Hyundai Tucson.
Safety / mechanic note
A damaged engine can stall or catch fire. Verify with a mechanic or dealer.
Recalls & service bulletins
Recalls
- 21V727000 2017 Tucson and Sonata Hybrid: connecting rod bearings may wear prematurely and damage the engine. Dealers inspect the engine, replace it if bearing damage is found, and install Knock Sensor Detection System (KSDS) software. Details
NHTSA complaints: 470 keyword-matched complaints for Hyundai TUCSON 2017–2017 (of 1,088 unique complaints queried, NHTSA complaints API by model year, queried 2026-10-16).
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.