Engine
Risk. A fuel leak in the presence of an ignition source can increase the risk of a fire.
NHTSA has logged 1,559 owner complaints about the 2012 Hyundai Sonata, most often about the engine. It is covered by 8 safety recalls, and for recall 18V-934 the manufacturer reports only 56% of affected cars repaired.

Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through October 27, 2026. Updated daily. Photo: MercurySable99, CC BY-SA 4.0.
1,559 complaints grouped by the system owners reported.
| System | Complaints | Crash, fire or injury |
|---|---|---|
| Engine | 568 | 80 |
| Steering | 301 | 9 |
| Electrical system | 235 | 35 |
| Air bags | 170 | 21 |
| Service brakes | 151 | 19 |
| Exterior lighting | 141 | 13 |
| Fuel/propulsion system | 99 | 9 |
| Power train | 97 | 10 |
| Vehicle speed control | 84 | 10 |
| 22 other systems | 312 | 30 |
Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.
Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.
Risk. A fuel leak in the presence of an ignition source can increase the risk of a fire.
Risk. If the frontal air bags, seat belt pretensioners, and side air bags are disabled, there is an increased risk of injury to the vehicle occupants in the event of…
Risk. If the seat belt linkage detaches from the seat belt anchorage, it can not properly restrain the occupant in the event of a crash, increasing the risk of…
Risk. In the event of a crash, if the seat belts detach from the anchor pretensioners, it can increase the risk of injury.
Risk. If the brake light switch plunger does not retract as it should when the brake pedal is not being pressed, the brake lights may stay illuminated preventing…
Risk. Engine failure would result in a vehicle stall, increasing the risk of a crash.
Risk. If the transmission shift cable detaches, the transmission gear selection may not match the indicated gear and the vehicle may move in an unintended or…
Risk. The curtain airbag may inflate without deployment command and increase the risk of injury to occupants of the vehicle.
Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with Hyundai.
92kmiles, median
Based on the odometer reading in 341 engine complaints. 55% were reported before 100,000 miles.
Dollar amounts owners wrote in their complaints when describing a repair or a quote. These are not price estimates; a system is shown only when at least 8 owners mentioned a cost.
$400median
$4,800median
$3,000median
$800median
If a problem is covered by a recall, the dealer fixes it for free. Some manufacturers also reimburse owners who paid for a repair before a recall was announced.
Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the Sonata median. How we score
2012 Hyundai Sonata 4 DR FWD in NHTSA's New Car Assessment Program. Photos are from NHTSA's crash tests.



Federal investigations that included the 2012 Hyundai Sonata, and the recalls they led to.
Recent engine complaints filed with NHTSA, shortened. Personal details are removed.
On August 19, 2026, at 76,170 miles, the engine in a 2012 Hyundai Sonata GLS suddenly lost power and shut off while the vehicle was moving on gas station property. The driver had traveled approximately 10 feet before the engine stopped. Repeated attempts to restart were unsuccessful; the engine…
The contact owns a 2012 Hyundai Sonata. The contact stated that while driving at 30 MPH, the check engine warning light illuminated, the engine started knocking, and smoke emitted from under the hood. The contact decelerated to approximately 15 MPH and drove to her nearby residence. Upon…
Vehicle engine caught fire in April 2026! Tow company sold for parts without my permission! Immediately after gaining possession of my car. I didn't have comprehensive insurance, only basic. I had a brain bleed stroke Nov. 2022 and this is causing stress, setbacks. No attorneys want to take the…
Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.