ENGINE06/10/2026
The Hybrid Electric Vehicle (HEV) system in my 2017 Hyundai Sonata Hybrid Limited malfunctioned. On three separate occasions, the HEV warning light illuminated while I was driving on the highway, followed by a sudden loss of power. The vehicle stalled and stopped running, leaving it inoperable. The incidents occurred in approximately August 2022, November 2023, and February 2026. The vehicle is available for inspection upon request. Each incident occurred while driving on a highway. The vehicle suddenly lost power and stalled in moving traffic, creating a significant safety hazard. I was forced to attempt to move the vehicle out of active traffic lanes while other vehicles were traveling at highway speeds. The unexpected loss of propulsion increased the risk of a crash, serious injury, or death to myself, my passengers, and other motorists. The vehicle was taken to a Hyundai dealership after each incident. However, the dealership did not provide an explanation for the HEV warning light, loss of power, or stalling condition. To my knowledge, no permanent repair was identified, and the problem recurred on multiple occasions. The vehicle was inspected by a Hyundai dealership following each towing event. The vehicle was towed after each incident because it was not safe to drive. To my knowledge, Hyundai did not provide a definitive cause for the failures. The vehicle has not been inspected by police or insurance representatives in connection with
ENGINE04/15/2026
2/25/2026 vehicle was put in service for a safety warranty recall. 2/26/2026 Hyundai approved the replacement of the engine, but there were costs involved that I was responsible for (approx. $800). 3/9/2026 I was informed by Hyundai the vehicle was complete, and would now last "for another 200,000 miles". I picked up the vehicle and only drove 5+ miles from the dealership when the vehicle’s motor completely shut down, putting me in a VERY UNSAFE driving condition, almost causing a serious accident. Vehicle was returned to Hyundai the same day and I was informed they were still figuring out the failure and to be patient. 3/11/2026 Hyundai informed the vehicle would now need a new catalytic converter and O2 sensor, and that it would all be covered under warranty. On 3/12/2026 Hyundai informed me that they would not fully cover the cost of the new parts and I ended up paying another $1300. 3/19/2026 Hyundai notified me that the vehicle service was complete, and the vehicle was ready for pick-up. I picked up the vehicle that day and again only drove 5+ miles when the vehicle repeated the same failure with the motor completely shutting down and again putting me in a VERY UNSAFE driving condition and almost causing a serious accident. Vehicle returned to Hyundai the same day. 3/23/2026 was told I would receive update once technician gets to the vehicle. 3/26/2026 informed that the vehicles Brake Booster Actuator needed replaced, and I have to cover the almost $4000 to replace this part and later informed Dealerships GM was covering cost. 4/8/2026 vehicle being worked on and completed by the end of that day. 4/9/2026 vehicle failed a 3rd time with same codes and limp mode. Tech line stating to replace EGR valve and Intake Manifold. 4/13/2026 informed that Hyundai refused to pay total amount, but were going to re-submit to not be completely out of pocket. 4/15/2026 vehicle has now been in Service for 7 weeks for a Safety Warranty recall.
STEERING,ELECTRICAL SYSTEM,SERVICE BRAKES11/29/2025
While traveling 40 mph, car flashes a warning, "Check Hybrid System", and then the car shuts off. No power steering and brakes are difficult. The warning is only 3-5 seconds before everything shuts down. This is definitely a hazard to myself and others. If in traffic at higher speeds, there would certainly be an accident with devastating results.
ENGINE09/21/2025
The engine shut off on the highway on two different days. Vehicle was going between 65 and 70 mph. The vehicle engine shut down and all the warning lights came on. Every one. The vehicle still moved but nothing inside worked, it ran on battery mode for the 17 miles to the dealership with a maximum speed of 60 mph. The risk was the immediate unresponsiveness of the vehicle and the sudden and immediate reduction in speed and power. It presented itself twice in about 2,000 miles. The dealership charged a 491$ diagnostic and found all the warnings and reset it, not reason for it happening and sent me on my way. Then it happened again. Brought back to the dealership and they tried to say they did another diagnostic and called the tech helpline. It took hours and they still don’t have a definitive answer, wanted to try almost 2k in repairs to see if it would fix the issue without any guarantees it would. Warning lights, all of them came on, cruise control, abs, engine light blinking, steering, literally everything and messages started running through the information center.
SERVICE BRAKES09/12/2025
Vehicle: 2017 Hyundai Sonata Hybrid – 131,700 miles – Maryland registered While driving, my vehicle displayed the warning “Check Hybrid System. Turn off engine.” The dealer diagnosed a failure of the Hydraulic Control Assembly (ABS/Brake Control Unit). This is a safety-critical braking system. The vehicle is unsafe to drive until repaired. Hyundai previously issued recalls for this same component on earlier Sonata Hybrid models (2011–2015), due to risk of brake failure and fire. My 2017 vehicle is experiencing the exact same failure, yet is not currently included in the recall. This defect should be investigated as it compromises safe braking performance and puts drivers and passengers at risk. I am requesting that NHTSA review this issue and consider expanding Hyundai’s recall coverage to include later model years like mine.
STRUCTURE08/25/2025
I was drying my car after washing it(I only use products approved for washing and drying vehicles) when a piece of paint on the hood just peeled off. It has not been wrecked or damaged in any way on the hood so I feel it must be a defective paint job from the factory.
ELECTRICAL SYSTEM06/16/2025
Odometer Fraud. The contact stated that while attempting to purchase a 2017 Hyundai Sonata Hybrid, it was later discovered that there was a mileage discrepancy. The vehicle was not yet purchased. The vehicle mileage was 87,000, but the contact later discovered that the mileage was 105,000.
ENGINE AND ENGINE COOLING06/10/2025
The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated while driving at various speeds, the contact noticed an abnormal ticking sound coming from the engine. There was no warning light illuminated. The vehicle was taken to the dealer, where it was diagnosed with engine failure due to the rod bearings failure. The dealer determined that the engine needed to be replaced and informed the contact that the repair was not covered under an unknown recall due to the mileage. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 183,000.
STEERING05/09/2025
Driving the vehicle, I was turning right on exit , the steering wheels turn extremely hard. It turn so hard have to pull over on side of the road. Steering light and traction turn on. Cycle the key and vehicle reset light nothing happen. Vehicle do not give fault code after key was cycle.
ENGINE03/19/2025
FAIL/MALFUNCTION 3/18/25: Internal engine failure diagnosed by local Avondale, AZ Hyundai dealership service - rod bearing failure suspected. Vehicle currently undergoing Bearing Clearance Test to affirm this or any connecting rod issues, with possible need for total engine replacement. When googling "Hyundai Sonata hybrid 2017 internal engine failure," masses of reports generate from consumers with this model, complaining of same defect, as do numerous recalls for such defects that have been mandated for the model with range of years including 2017.Yet when searching with my VIN, it says no recalls have been mandated, in spite of the undeniable, widespread identical defect. Available for inspection. SAFETY RISK: Driving on the freeway in city traffic at 70-75mph, the engine completely stopped and all dash lights lit up at once. Vehicle had to be coasted to shoulder to wait for roadside assistance. Extremely hazardous to us in vehicle and to all around us with sudden, dramatic speed change in moving, constant freeway traffic. First time: Our usual mechanics at Pep Boys did diagnostic but found nothing, the vehicle drove normally for them, yet they did our regular tune-up, oil change, etc. Two weeks later, the same event happened on freeway, identical to first time. We were very lucky that no crashes happened either time. Pep Boys advised that Hyundai investigate the issue. PRIOR SYMPTOMS: No warning lights or sounds presented until the events themselves, when the entire dash lit up. However, in the couple of months before, there were occasional, slight hesitation moments in the motion while driving at any speed. CONCERNS: 1) It seems Hyundai is on track to want to charge me for an entire engine replacement, or for whatever engine repairs they deem, e.g. connecting rods, for manufacturing defects that they are entirely responsible for, 2) no recall seems to be mandated YET for this VIN batch, and 3) too many consumers are in danger - physically and financially.
ENGINE02/03/2025
The contact's son owns a 2017 Hyundai Sonata Hybrid. The contact stated that while her son was driving at an undisclosed speed, he smelled a burning odor on the interior of the vehicle, after which he heard an abnormal sound coming from the engine compartment. The check engine warning light was illuminated. The vehicle was taken to the dealer to be diagnosed; however, the contact was not aware of the diagnostic report. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 21V727000 (Engine); the VIN was included, and parts were available. The contact also stated that the vehicle had a Salvage Title. The manufacturer was not notified of the failure. The failure mileage was 66,000.
ENGINE02/03/2025
The vehicle had a recall to replace the motor for bearing failure. They replaced my motor at 101,000 miles. The second motor than failed for the exact recall of bearing failure at 65,000 miles on the new motor. They told me that since I had already have done the recall and my car was now out of warranty that I would have to pay 10% of the repair bill for another motor. This second motor should have been included in that recall.
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