Which parts fail
Components named in complaints (battery, alternator, wiring, ignition, instrument cluster, infotainment).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2017 Hyundai Sonata owners, lightly cleaned up (personal details are redacted by NHTSA).
Power relay has been replaced several times, air bags did not deploy with either wreck and loss control of steering causing a crash which bent the frame. Hyundai never once contacted me regarding this defective car they replaced motor in because of knock sensor and im lucky to be alive. On one of the accidents in February there was an error message that popped up right before I had the wreck and it was an error message wrong with the cars transmission system or something like that I had the dealership who said there was no codes on that car and I had my own personal mechanic who had codes pop up on that car that the dealership hid
I was involved in a severe motor vehicle collision in a 2017 Hyundai Sonata. The airbags failed to deploy during the crash. I sustained serious injuries and was transported from the scene by EMS. This vehicle has known safety recalls, and I believe the airbag non-deployment may indicate a safety defect.
The check engine light started flashing Check hybrid system turn off engine massage appeared The gas pedal doesnt work and the car jumps The problem happened 4 times so far with me The same problem happened about 5 times with my uncle that drives 2016 sonata hybrid
The vehicle is available upon requested inspection. Since I bought the car in 2019 it has made a rattling sound like the engine is knocking. Not a severe knocking, however, it does make a clicking/rattling sound in idle, occurs more rapidly while accelerating, then sounds like a muffled diesel while the engine's torque is dropping when shifted into neutral coasting on the road. Oil has been changed in its due time. Between 3k - 7k as scheduled. Independent service provider didn't think it was normal and recommend I check for recalls. I asked Hyundai dealership representative and said it's a normal sound. Other vehicles I've driven don't sound like this. Even an older '96 Buick sounded smoother running. Nothing has failed, caused an injury or accident. Engine light has recently come on. …
Hybrid system failed, lost power while driving on freeway going 65 m/h during rush hours, RPM gage went down to 0, most instrument light weee lit on dashboard. Speed went all the way down to 40 m/h pressing the gas all the way down. Hybrid system warning light was flashing. Could have been hit by other vehicles on freeway I had to put my hazard flashing signal and wait for the right moment to pull my car off the road and to emergency lane to stop. The first time car was towed to dealer. And dealer was able to confirm the Problem. The spent 2 weeks at dealer until the claimed they had to contact the manufacture and ended up replacing a wire harness they thought water got into it, paid over $600 for this fix. Few months later same problem they ended replacing some sensors due to a recall. A week later happened again all 3 time on the freeway. …
As I am driving, at random times, typically at cruising speeds of about 40 mph or less, the STEERING wheel will lock up and I will be unable to STEER the vehicle until I turn the car off and back on again. There are typically some warning lights (i'll try to attach the picture) that pop up and go away once the car is turned off and back on again. No dealership that I have taken it to has been able to diagnose the problem since it does not, to my disdain, occur under their watch (it is not reproduced). This issue puts both my life and EVERYONE in my proximity's life at risk as I have NO CONTROL of the vehicle once it locks up. At this point it has occurred for over 2 years that I have had this car. There are some warning signs right before it occurs. First, there is typically a sudden change in the resistance of the steering wheel. …
HEV lights came on stalled car and stated to turn engine off, barely made to a parking lot. Car was towed, in shop Dec 29, 2022 to Jan 10, 2023. knock sensor replaced, rusty spark plugs slots cleaned out, no communication with power train, case #20817405 June 16, case# 21597503 part A: Hev lights again chugging and stalling. Car towed in shop 22 days, returned 7-5-22.actuator 2nd time failure, knock sensor issue, clogged, emissions were cleaned: part b: Aug 14, to Oct 4 2023HEV system lights again, car stalled and died then towed : combustion cleaning 2nd time, spark plug corrosion replaced 2 time issue, 4 injectors replaced, recommend replace manifold (which I cannot pay for) dealer tech test drove 2 days and put 211 miles on car, more than we do in normal week driving to work and shopping In shop this time 52 days. This car has been taken in for all recall campaigns. …
driving on the side of the interstate, the hybrid battery indicator continuously dipped low. Minutes after continuing driving on the interstate around 50 to 60 mph, every light on the dash came on the vehicle stopped accelerating, and the warning light check HEV system shut engine off started flashing. The vehicle would no longer start again after this. the dealership said that the fuse was being oversupplied, which is what caused the system to fail. This exact situation is listed in a recall for 2013 to 2015 Hyundai Sonata hybrids. After reading the recall notice., my vehicle had this failure due to the exact reasons listed in the recall notice. due to the damage that was caused by this fuse that could not hold enough electricity my wiring harness also has to be replaced. …
Here is your updated review with that included: I am very disappointed with Hyundai Motor America and the service I received at Hyundai of Renton. I own a 2017 Hyundai Sonata and received a letter about a required software update and ignition cylinder protector due to known theft issues. I went to the Renton dealer for the recall service. They performed the software update and were supposed to install the ignition cylinder protector. Unfortunately, my car was later stolen because of this exact issue. The ignition was damaged during the theft, and I had to replace it myself just so I could drive the car. When I returned to the dealer, they refused to install the ignition cylinder protector, saying the ignition was broken. It was broken because of the theft - which happened due to Hyundai's known defect. After the recall software update, my key fob also stopped working properly. …
The power steering system appears to be failing. There is no indication of the failure prior to failing. When making turns the power steering would randomly stop working, all emergency lights would turn on, and the steering would become extremely difficult to control. This becomes an extreme safety issue when I'm driving around other vehicles. I took my vehicle to a mechanic and they explained that the power steering is electronic, therefore power steering fluid will not fix the problem. Also, there's an electrical issue with the windows as well. The passenger window can no longer can be controlled by the driver. Lastly, the AC has failed as well. It blows out only hot air. I've taken my car to the manufacture dealership and they assessed my vehicle for the AC problem, but they stated that it's working fine. …
Related recalls
Electrical system › Software
Hyundai Motor America (Hyundai) is recalling certain 2015-2017 Sonata, 2016-2017 Sonata Hybrid, and Sonata Plug-In Hybrid vehicles. The Smart Junction Box (SJB) software logic may not properly interpret the signals received from the multifunction switch, which could cause the turn signal to activate in the opposite direction of…
Remedy: Dealers will update the SJB software, free of charge. Owner notification letters were mailed November 19, 2021. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 210.
Electrical complaints in other Sonata years
Frequently asked questions
How common are electrical problems on the 2017 Hyundai Sonata?
NHTSA has 65 complaints about the electrical system of the 2017 Hyundai Sonata, 8% of the model year's 766 complaints. The component named most often is ignition › coil › spark plugs (1 mentions).
Is there a recall for 2017 Hyundai Sonata electrical problems?
Yes — NHTSA recall 21V-749 (software, Sep 24, 2021). Recall repairs are free at authorized dealers.
At what mileage do 2017 Hyundai Sonata electrical problems start?
Half of the complaints with a recorded mileage happened before about 25,000 miles, and 53% before 25,000 miles.
Is it dangerous?
Owners linked 4 crashes, 0 fires and 2 injuries to electrical system 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.