NHTSA Complaint #11691690 — 2015 HYUNDAI SONATA UNKNOWN OR OTHER

Complaint Details

ODI Number	11691690
Vehicle	2015 HYUNDAI SONATA
Component	UNKNOWN OR OTHER
Date of Incident	September 26, 2025
Date Filed	October 6, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	DE

Consumer Description

While driving, my 2015 Hyundai Sonata 2.0T experienced severe knocking and loss of power due to a KSDS-related engine defect. The check engine light was inoperative, and the engine now makes loud noises and emits fumes. Hyundai declined warranty coverage despite known KSDS issues. This poses a serious safety concern ( I recently purchased the car and been fixing problems every since)

Related Complaints for the 2015 HYUNDAI SONATA

Other UNKNOWN OR OTHER Complaints

#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...

#11701032 — November 23, 2025 — The paint started peeling off in large sections.

#11701043 — November 23, 2025 — On the highway, my 2015 Hyundai Sonata suddenly began making a squealing or metallic rattling noise. At first, I thou...

#11700199 — November 18, 2025 — At about 30mph the sunroof suddenly flew of of my car and almost hit the car behind me thst had to avoid the flying ...

#11692450 — October 9, 2025 — I am reporting a recurring and unresolved hybrid system failure in my 2015 Hyundai Sonata Hybrid Limited that poses a...

Recent Complaints for the 2015 HYUNDAI SONATA

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

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

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

#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...