NHTSA Complaint #11695853 — 2015 HYUNDAI SONATA

ENGINE issue reported to NHTSA

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Complaint Details

ODI Number	11695853
Vehicle	2015 HYUNDAI SONATA
Component	ENGINE
Date of Incident	October 16, 2025
Date Filed	October 27, 2025
Mileage	155,000 miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	CA

Consumer Description

The contact owns a 2015 Hyundai Sonata. The contact stated that while driving at 40 MPH, there was an abnormal sound coming from the engine before the vehicle stalled. The contact pulled over to the side of the road. The check engine warning light was illuminated. A dealer was contacted. The vehicle was taken to the dealer, where it was diagnosed and determined that the knock sensor had failed, and that the engine needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure and offered a buyback. The approximate failure mileage was 155,000.

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