Which parts fail
Components named in complaints (headlights, tail lights, turn signals, interior lights).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2012 Hyundai Sonata owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2012 Hyundai Sonata. The contact stated that the rear taillights failed to illuminate upon depression of the brake pedal. There was no warning light illuminated. The contact had taken the vehicle to a dealer where she was informed that the socket to replace the light bulb had melted and that due to the failure, both light bulbs could not be replaced. The contact also mentioned that a white smoke had emitted from her driver side headlight when she attempted to replace the light bulb. The contact was able to replace the driver side headlight bulb; however, the driver side headlight bulb would illuminate very dim. The manufacturer had yet to be notified of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 160,000.
The contact owns a 2012 Hyundai Sonata. The contact stated he would need to replace both rear brake lights every two months. The contact stated recently he noticed a burning smell and saw the plastic cover on the bulb was melted. The vehicle was not diagnosed or repaired. A dealer was not contacted. The manufacturer had not been informed of the failure. The failure mileage was approximately 80,000.
The contact owns a 2012 Hyundai Sonata. The contact stated that while driving at 45 MPH, the the passengers side tail light failed. No warning light was illuminated. The vehicle was driven to the independent mechanic where it was diagnosed that the tail light needed to be replaced. The vehicle was repaired however the failure reoccurred and was taken back to the independent mechanic where they stated the harness had melted and advised that he go to the dealer. The vehicle was taken to the dealer where it was confirmed that the passenger's side tail light harness was charred and deformed. The vehicle was repaired but the failure reoccurred. The vehicle was taken back to the dealer for a second time where it was informed that the harness or housing had been scorched and the tail light socket melted. The vehicle was repaired. …
The contact's son owns a 2012 Hyundai Sonata. The contact stated when she arrived at her residence, she noticed that her son's rear brake lights illuminated while the vehicle was turned off. The contact stated no warning light was illuminated. The contact stated her son placed a can on the brake pedal to turn off the brake lights. The contact stated she had to disconnect the battery and reconnect before using the vehicle. The contact took the vehicle to an independent mechanic and associated the failure with NHTSA Campaign Number: 15V759000 (Exterior Lighting) however, the VIN was not included. The vehicle was not repaired. The contact called the local dealer and made them aware of the failure. The vehicle was not diagnosed or repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 179,000.
The contact owns a 2012 Hyundai Sonata. The contact stated while driving approximately 30 MPH and depressing the brake pedal, the brake pedal failed to return to the normal upright position. The contact stated that the taillights remained illuminated as if the brake pedal was still depressed. The contact stated that the stabili-trak warning light illuminated intermittently. The contact had not taken the vehicle to a local dealer or independent mechanic to be diagnosed. The vehicle had not been repaired. The manufacturer had not been informed of the failure. The contact researched online and related the failure to NHTSA Campaign Number: 15V759000 (Exterior Lighting). The failure mileage was approximately 147,000. The VIN was unavailable.
The contact owns a 2012 Hyundai Sonata. The contact stated that the vehicle was consuming an excessive amount of engine oil. The contact stated that the check engine warning light had remained illuminated. The contact stated while driving at 40 MPH, the vehicle shut off and failed to restart. The vehicle was towed to a dealer. The contact was informed that there were no recalls on the VN. The vehicle was then towed to an independent mechanic where the contact was informed that the timing chain had fractured and needed to be replaced. Additionally, the contact stated that the headlight and taillight bulbs would burn out and require frequent replacement. The vehicle was not repaired. The failure mileage was approximately 185,000.
The contact owns a 2012 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, there was an abnormal burning odor coming from the vehicle. While depressing the accelerator pedal, the vehicle hesitated and stalled. The contact stated that the rear driver's side brake light was inoperative. The failure occurred on several occasions. No warning lights were illuminated. The contact researched and was made aware of an undisclosed recall; however, the VIN was not included in the recall. The vehicle was taken back to the residence. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 168,000.
The contact owns a 2012 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, the contact became aware that the passenger's side headlight was inoperable. The vehicle was taken to an independent mechanic, where it was diagnosed that the headlight bulb socket had failed, and the mechanic determined that the passenger's side headlight assembly needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and referred the contact to the dealer for a goodwill repair. The dealer was notified of the failure, but no assistance was provided. The vehicle was not repaired. The failure mileage was approximately 120,000.
The contact owns a 2012 Hyundai Sonata. The contact stated after the vehicle was parked, the brake lights were illuminated without the brake pedal being depressed. The failure caused the battery to be drained; requiring the vehicle to be jump started. The contact stated no warning light was illuminated. The contact had not been taken the vehicle to a local dealer. The vehicle was not diagnosed or repaired. The contact researched the failure online and related the failure to NHTSA Campaign Number: 15V759000 (Exterior Lighting). The manufacturer had been informed of the failure. The failure mileage was approximately 98,000.
The contact owns a 2012 Hyundai Sonata. The contact stated that after turning the vehicle off, the rear brake lights remained illuminated. The contact had to disconnect the battery to turn off the lights. The contact stated that eventually the brake lights became inoperable. The cause of the failure was not yet determined. The manufacturer was notified of the failure and informed the contact that the VIN was not included in NHTSA Campaign Number: 15V759000 (Exterior Lighting). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 111,000.
Related recalls
Exterior lighting › Brake lights › Switch
Hyundai Motor America (Hyundai) is recalling certain model 2011-2012 Sonata vehicles. The brake pedal stopper pad can deteriorate allowing the brake light switch plunger to remain extended when the brake pedal is released.
Remedy: Hyundai will notify owners, and dealers will replace the brake pedal stopper pad with an improved part, free of charge. The recall began on January 6, 2016. Owners may contact Hyundai customer service at 1-855-671-3059.
Headlight complaints in other Sonata years
Frequently asked questions
How common are headlight problems on the 2012 Hyundai Sonata?
NHTSA has 141 complaints about the lights of the 2012 Hyundai Sonata, 9% of the model year's 1,558 complaints. The component named most often is brake lights (10 mentions).
Is there a recall for 2012 Hyundai Sonata headlight problems?
Yes — NHTSA recall 15V-759 (switch, Nov 16, 2015). Recall repairs are free at authorized dealers.
At what mileage do 2012 Hyundai Sonata headlight problems start?
Half of the complaints with a recorded mileage happened before about 100,000 miles, and 5% before 25,000 miles.
Is it dangerous?
Owners linked 2 crashes, 11 fires and 3 injuries to lights problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.