NHTSA Complaint #11695826 — 2015 HYUNDAI SONATA

ENGINE issue reported to NHTSA

Check any vehicle history by VIN - Free vehicle history report

Complaint Details

ODI Number	11695826
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 was able to pull 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 the engine needed to be replaced. The vehicle was repaired. The manufacturer was notified of the failure and offered to buy back the vehicle. The approximate failure mileage was 155,000.

Related Complaints for the 2015 HYUNDAI SONATA

Other ENGINE Complaints

#11719062 — February 19, 2026 — Engine has knocking sound. Sudden loss of power and hesitation when accelerating

#11718824 — February 18, 2026 — The vehicle suddenly lost power while driving on a public roadway. Immediately after, the vehicle began producing a l...

#11718641 — February 17, 2026 — Component/System Failed: Engine – connecting rod bearing failure consistent with Hyundai Theta II engine defect subje...

#11718051 — February 14, 2026 — While driving on the freeway, my vehicle experienced a sudden and catastrophic engine failure. The check engine ligh...

#11717311 — February 11, 2026 — Was driving car and it went completely hot. Towed to a dealership and they said was not drivable and that the radiato...

Recent Complaints for the 2015 HYUNDAI SONATA

#11718641 — FUEL/PROPULSION SYSTEM — February 17, 2026 — Component/System Failed: Engine – connecting rod bearing failure consistent with Hyundai Theta II engine defect subje...

#11718641 — POWER TRAIN — February 17, 2026 — Component/System Failed: Engine – connecting rod bearing failure consistent with Hyundai Theta II engine defect subje...

#11718659 — SUSPENSION — February 17, 2026 — This complaint concerns a repeat failure of both front CV axles on my 2015 Hyundai Sonata. The CV axles and boots wer...

#11717311 — UNKNOWN OR OTHER — February 11, 2026 — Was driving car and it went completely hot. Towed to a dealership and they said was not drivable and that the radiato...

#11712218 — WHEELS — January 20, 2026 — We have had issues with tires not wearing equally and tears on the inner tire/s shortly after replacing. This has hap...