general problems of the 2015 Hyundai Sonata - part 1

I was turning into a parking spot and the car accelerated unexpectedly. I slammed into a snow bank and my front bumper was damaged.

The rubber stopper for the brake light switch on the brake pedal deteriorated and fell apart. This resulted in the brake lights remaining on constantly, cruise control being disabled, and low battery voltage.

We pulled up at hillgreen circle cockysville MD to drop my boyfriend off at his apartment. I went to pull in the parking spot. I went to put the car into park and it had no brakes. I was slamming them and pumping them. It excellerated and took off. Jumped the curb,went down the hill and into the apartment building. A red light had came on the dash, right before it took off. Seemed like it was changing to gas or the electric mode,or the other way around. The airbag on the passenger side came out deflated,and filled with smoke going into the car. He was the belted front passenger and his elbow went in to the front window. You can tell by looking at it,the hole and spidered around it. He broke his right elbow. It is available anytime at the moment. It's at Hyundaii in glen burnie. I need to get it to state farms lot,to get the kelly blue book value. We look forward to hearing from you.

My 2015 Hyundai Sonata has demonstrated multiple instances of unintended acceleration and braking failure: April 20, 2024 – while idling in a drive-thru line, the vehicle suddenly lurched forward without any attempt to accelerate and crashed into the vehicle in front of me. I was unable to stop it. This resulted in the other car being totaled. I took it to a Hyundai dealership afterward, but they found no definitive cause. April 4, 2025 – my daughter was driving and attempted to stop at a red light. Despite applying the brakes, the car did not stop and continued through the intersection, striking the door of another vehicle. May 12, 2025 – today, while using cruise control set to 55 mph, the car began accelerating beyond the set speed without input. It appears the cruise control system is malfunctioning and not disengaging as expected. The vehicle currently shows no open recalls, but I found that similar issues were previously investigated under NHTSA action dp21003 for this model year. These incidents occurred months apart, but the behavior is consistent and extremely dangerous. I am requesting a formal investigation. The safety of my family and others on the road is at risk.

The turning signal gives the opposite signals sometimes.

I was driving down the street I went to show down by hitting my brakes they wouldn't slow down the vehicle then the car caught fire.

At 40,000 miles the transmission is already jerking, shifting hard into gear and downshifting hard .

The contact owns a 2015 Hyundai Sonata. The contact stated while depressing the brake pedal, the vehicle veered to the right. The vehicle was taken to the local dealer and the brake rotors were modified, and the failure was corrected. Additionally, while driving at speeds over 65 mph, the front driver’s side of the vehicle was shaking and vibrating abnormally. The cause of the failure was not yet determined, and the vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 70,000.

In April 2023, I purchased a 2015 Hyundai Sonata eco from carvana with 56,000 miles. By may 2023, the mileage was around 72,000. While driving from south houston to north houston on may 22nd, 2023, the car loudly popped as I exited the highway around 5:00 pm cst. I noticed smoke coming from the rear and parked in a construction zone near a convenience store. Upon inspection, the vehicle stopped working, and I saw a significant fluid leak underneath. A bystander alerted me to flames from the bottom and under the hood. I called 911, and the fire department arrived to extinguish the fire. Fortunately, there were no injuries or property damage. I later discovered that specific 2011–2015 Hyundai models had been recalled due to fire risk (NHTSA 23v-651000), but this did not include the Hyundai Sonata eco. The recall was due to the anti-lock brake system (abs) module leaking brake fluid internally, potentially causing an electrical short and leading to a fire. I have photos and videos documenting the incident. Following the incident, I filed a claim with travelers insurance, and on may 28th, 2023, the vehicle was declared a total loss. While I appreciate their offer of ~$13,000, it is insufficient to cover the remaining loan balance of approximately $17,300. I am worried about the financial impact and potential danger I face due to this malfunction. The lack of information highlights the need for better consumer education. I am now looking into options to cover the remaining loan balance, acquire a new vehicle, and, most importantly, advocate for improved driver education regarding this defect.

Intake camshaft, camshaft position actuator circuit and brake booster are the system that failed all in the same week. My safety is being put at risk because of the bad brake booster I almost rear end someone else. My car doesn’t accelerate has it should initially which could cause a wreck. Problems has been confirmed by independent service center. My car has been inspected by mechanics. My engine light is on and when diagnosed the codes p0011-00 & p0010-00 pop up.

Car was going approximately 50 miles an hour on a side street when warning lights went on, brakes stopped working, and the engine smoked and appeared to catch on fire. Car was steered into a parking lot and abruptly placed in park. Occupant grabbed valuables and quickly exited the vehicle. At that point, the front of the vehicle, under the hood went up in flames.

My 2015 Sonata will stall out dropping speeds to 12-24 when I slightly merge, when I turn ect. Then it won’t accelerate for what seems like 10 minutes realistically 2 minutes maybe 3 then will slowly regain speed. I’ve almost wrecked twice share care with daughter and she’s been victim to it way way more. This is scary and Hyundai won’t stay behind their product local dealership won’t fix recalls so we have to go over 120 miles for repairs. The recall isn’t even for transmission engine.

My break went out while trying to make a stop.

My hydraulic brake booster went out, very dangerous I almost had an accident, the car doesn’t stop, there are no brakes the car would not stop I’f the hydraulic brake booster goes out you have no brakes and if you’re over 50 miles an hour the e break barely does anything it just sounds like you grinding into the ground. Very scary and I had a child in the car. Towed car to Hyundai.

Recall notifications for Hyundai campaign 251 but no remedy available since early 2023. Finally learned a remedy was available, made online appointment with my dealership (future Hyundai of concord, concord, CA) but when I arrived for my appointment, they said they did not have the part. That was April 29, 2024. I was told to follow up in a week, which I did. Part still not available. Followed up several more times to which I have not received any response. I am driving a potentially very dangerous car now awaiting this recall remedy. Last year I waited 5 months for a new hybrid battery with similar lack of communication and delays.

The contact owns a 2015 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, the car stalled and struggled to stay on. The contact stated two days later the vehicle was parked and he was connecting his RV to the hitch and the vehicle independently moved and collided with a dolly. The contact stated that the dolly is used to load the RV to the hitch. The vehicle was towed to the dealer. The vehicle is being repaired. The dealer informed the contact that they can not diagnose the vehicle until it is repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 60,000.

Trying to break after being hit to prevent hitting another driver . Ended up hitting the driver still and my car ended up catching on fire .

While turning in an intersection on a highway, car displayed check hybrid system and shut down. Power steering could not engage so braking and turning was almost impossible. Car had to be towed, was not able to be restored.

I took the car for 4 recalls it had 2 of which were physical and the other two were software according to them. Took the car back to drop someone off, turned it off and then on; it began losing and breaking on its own at slow rpm’s slamming on the breaks. A minute later after having turned the corner I turned on my hazards and it had continued to randomly happen to the car. It is not consistent it is completely random and I have had a mechanic only inspect it while it happened once because I’ve only been able to have it happen while being inspected out of luck . I’ve gotten several error codes to the car since from p04 misfires. Evap leaks etc. The car was in pitch perfect condition and after that day it has since stopped working properly . I have photos of the mechanics that day even leaving food in the back of my car as if they just relaxed and didn’t do their job as professional as it could’ve have been . They denied anything is wrong with the car and have offered me discounted inspections after claiming nothing was wrong they gave me one free inspection and I haven’t gone back . My engine or censors are messed up. It puts my health and others at safety because it slams on the breaks unknowingly and randomly at low rpms. The manufacturer has inspected my car and claimed it was okay although they unprofessionally left food and ate breakfast and left trash in the back. (with photo proof) . Last there was no issues whatsoever with my car until that day. Never had a misfire . Never had a engine light . Never had a popped tire . It all began they day I got my car back not even an hour later. I could not return that day because it was near closing time of the dealership and the day after I went they denied it has been tampered. This happened around the beginning of July 1-8th 2023.

I would like to write about my experience with new port richey Hyundai. I have owned a Hyundai Sonata hybrid limited since 2015. I take immaculate care of my car and it only has 65,000 miles. All maintenance has been done regularly and on time. For the last six months I have had a warning light and alarm going off for a few seconds once in a while, which shuts off my cruise control. I took the car in, in the spring of 2023 to have the codes read and no problems were found. Finally, in July of 2023, while my wife was in traffic it started again and totally shut off the car. Unfortunately, the brakes did not work as well. She was going up a slight incline and was able to come to a stop. The brake pedal went completely to the floor. The warning was about a hybrid system failure. It was very upsetting to her that her brakes failed when the hybrid system had a problem. This should never happen! once the car was towed to new port richey Hyundai in florida, we were told that the car would be look after. The car was returned in the middle of July 2023 with a new electric motor installed. Everything was working fine until today, August 23, 2023. The same warning light that I brought the car in for in may 2023 is going off again. It only stays on for a second or two, so I don’t have time to read it. I really hope this car does not shut off again with no brakes when traveling on the interstate. As mentioned before the car has low miles and is well cared for. This should not be happening.

The car has had multiple issues with the hybrid system. I’ve taken it to the dealership about 4-5 times. They “fix” the issue but a little while later I’m having more hybrid warming issues. This last time I took it to a different dealership, paid for a diagnostic test, and was told my hybrid system was bad but because it was repaired too many times instead of replacing it, it’s no longer covered under warranty. The issue from the last diagnostic test showed the master brake cylinder was faulty, I replaced it but I’m still having the same issue. The mechanic I took it to did their own diagnostic test and it showed there is an issue with the hydraulic booster, high pressure accumulator short term charge. When I searched the issue, I’ve found that many people are having the same issue with the same car/year as mine. I contacted the manufacturer and they are still not willing to fix it even though it is a possible defect in the car.

The car has had an electrical issue ever since taking to to get a recall around may of 2023. It will randomly brake and shift the transmission badly while downshifting. I feel as if my make and model falls under the theta ii campaign they had to replace certain engines for having a knocking rod be fault and release shaving into the engine causing it to misfire. Not only that but the electrical issue is completely random it happens atleast once or twice a week. It had began ever since I took it for a recall, and when I took it back they found no issue and left food in the back of my car and the chairs leaned back. This was the fontana Hyundai dealership.

The contact owns a 2015 Hyundai Sonata hybrid. The contact stated while driving 45 mph, the vehicle started overheating, and he smelled an abnormal electrical burning odor inside the cabin. Several unknown warning lights were illuminated. The contact veered to the side of the road, turned off the vehicle and inspected under the hood. The contact stated that the vehicle failed to restart and was towed to the residence. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic), which he related to the failure. The dealer was notified of the failure. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

When I am driving car starts shaking a little I stop at a light and when I want to accelerate all of a sudden I step on gas and it wont drive I in middle of intersection it started shaking like it was going to turn off but didn't the check engine light came on but it never turned off I slowly accelerated and it kept driving I got to work turned it off when I turned back on the check engine light was no longer on . I have no idea what happened or why . And my brakes always make noise I had my breaks done in November they don't need replaced yet.

My power steering light came on last night when I arrived from work on Saturday night. Was hoping to take it in to be looked at but the dealership I bought it from is closed till Monday at 10. Woke up Sunday for work decided to see if the light was still on but it was off but about 7 minutes into the the light came back on along with the abs light, engine light, and oil light. I believe a couple more lights came on but not sure which ones but the car stopped working and starting completely.

Sensors lights would indicate an issue and would disappear sometimes without any reason (mainly check engine and tire pressure sensors). Indicators would trigger the opposite direction (indicate right and the left indicator would turn on). Burning more fuel than expected. Primary fuel pump stopped working resulting in car stopping in the middle of the road.

When driving my 2015 Hyundai Sonata hybrid, it will randomly start flashing and beeping at me with the saying "check brakes" also my abs brake light comes on. This function only happens at random causing me to shut off my car completely and restart. It has really become a problem after I reached 112000 miles on the vehicle. I bought the vehicle with 80,000 miles. Anyone driving in my car is put at risk due to brakes not working accurately and are spongy feeling when pressed down. If I were to have to slam on brakes, I would ultimately run into another vehicle or object since the braking system during this issue does not work correctly. I have called the dealership to ask about the recall. No recall on this issue but online, similar issues have been documented.

This is a follow-up to former complaint #11450586 (05-Feb-2022) and confirms that both my local Hyundai dealer -and- Hyundai corporation (USA) are aware of this diagnosable- and fixable problem—but they fail to issue a recall. In fact, a service advisor at my dealer expressly vocalized that 1) he himself [excluding his colleagues] has seen at least -2- of the same incident recently; and that 2) Hyundai corporation (USA) issued a “(service) bulletin” about the problem. Problem: the vehicle: 1) has a high idle; 2) shows a solid-illuminated cel/emissions light; 3) severely resists braking—my vehicle would even slide through stop signs; 4) fails to “pick up” normally; and 5) drives unsteadily. This is at minimum and is my experience from both last week and from the original report on 05-Feb-2022. As explained to me today (28-Mar-2022) by my service advisor, there is a known fault with a component within the engine (powertrain). Specifically, there is a tube that is—as I understand—meant to be free of fluids. However, and per the bulletin, the tube becomes full or over-filled with oil from the engine (powertrain). Further, the advisor suspects that changes in temperatures (e. G. , such as the teens *f back in Feb 2022) causes that oil/fluid to expand and contract, causing (further) damage. This issue must be remedied by Hyundai corporation (USA) immediately because it is a *safety risk. * my dealership emphasized severely how unsafe it would be to drive the vehicle off their premises without a repair. I’m fortunate because I’m the original owner and thus am covered by the 10 yr/100,000 mi powertrain warranty. Please save lives from these ‘flying’, uncontrollable cars by mandating a recall. **I will provide dealer’s documentation once vehicle is repaired. I was advised to wait 2-8 wks for parts and repair. **.

The check engine light intermittently comes on, when on the car will stall when trying to accelerate, often accelerate when not intended, and runs rough. A second issue seems to be with the abs system. On several occasions the abs systems seems to engage and will not allow you to use the breaks (almost leading to several rear end collisions).

The contact owns a 2015 Hyundai Sonata. The contact stated that the engine was consuming an excessive amount of engine oil. There was no warning light illuminated. The contact was frequently topping off the engine oil between scheduled oil change service. The vehicle was taken to a dealer and a 3,000-mile oil consumption test was performed. The test concluded that the vehicle was consuming an excessive amount of engine oil. The contact rejected the results. In addition, the contact stated that the brake pads were frequently replaced due to the vehicle shuddering upon depression of the brake pedal. The manufacturer had been notified of the failure. The vehicle was not repaired. The failure mileage was approximately 60,000.

Vehichle goes into limp mode on highway causing a drastic reduction in speed. Dash says hybrid alert do not drive. Loss of speed put me in danger due to loss of power and vehicle control. Dealer claims it is a bad brake booster that caused car to go into limp mode… want to charge me 3k to fix.

My brakes locked on the highway and I could not utilize the brakes to slow down the vehicles. I went off the meridian and finally came to a stop. I pumped the brakes and then they started to work again. I was able to cautiously get back on the road and make it to my house but they locked again a few miles later by my exit. I was able to get them to start working again and made it home. There were no warning lamps or messages nor any warning that led me to this. I could’ve easily been in a serious if not fatal crash.

The contact owns a 2015 Hyundai Sonata. The contact stated that while driving at 45 mph, the vehicle stopped suddenly on its own and was rear ended by another vehicle. The contact was able to drive the vehicle away from the scene of the collision. There was no medical attention received. A police report was filed. The dealer was made aware of the failure and informed the contact that there was no recall associated with the VIN. The vehicle was not repaired. The manufacturer was made aware of the failure and opened a case. The failure mileage was approximately 37,000.

The day I bought the vehicle from carmax, it was brough to my attention that theses been a recall request on the vehicle's parking break system. I'd like to get that checked out. Also, it seems as tho my left rear tire runs out of pressure quite frequently, as I've had to fill it up twice in the last two days (it got down to 24 for a day. ) these are immediate risks that I need taken care of ASAP. Thank you fr your time.

I own a 2015 Hyundai Sonata and I own it since beginning. All of a sudden the key features such as blind spot detection (bsd), along with anti-lock braking system (abs) and car skidding prevention system stopped to work in my car. I contacted Hyundai dealership (with my car clocking about 62,650 miles) and I was told that such important safety features are not covered under warranty. When I contacted Hyundai USA corporate office, I was told that such key safety feature can go wrong any time which was such a shocking news for me and my family. My car does not detect any vehicle which is coming/passing through at high speed, and the real worst thing is that it's anti-lock braking system (abs) and skidding warning system are not at all functioning which compromise the safety of my family. I am really concerned for the safety of my family and other people traveling in different car at the same time. My family's safety means nothing for dealership or tp Hyundai corporation but they are just concerned to bill me and my family hundreds of dollars for their faulty parts/safety system at this pandemic time.