2015 Hyundai Sonata Brakes Problems

I have the 2015 Hyundai sonata with the 2.5 GDI engine that eventually will seize due to internal damaged caused by manufacture design flaws. My Hyundai threw a P0010 code which causes my car to idle high and causing low vacuum affecting my brakes. I had a diagnostic test done at a Hyundai dealership that told me it was a cvvt cam sprocket issue and that it was the beginning of the end of the engine, They quoted me 3700.00 but the engine was to far gone and this repair would only accelerate the engine to seize. They said since the engine isn't seize Hyundai will not cover the cost to repair or exchange the engine, I contacted the Hyundai customer service who stated since the repair that is needed wasn't the root cause of the problems associated with the engine swap warranty they were not going to help me even though I explained to them that the cars high accelerating and the braking system been jeopardized and been told the engine is beyond repairs I feel Hyundai should reconsider their decision and help a loyal customer. I have purchased 12 Brand New Hyundaj since 2001. The customer Representative was Extremely un Professional even suggesting I scrap my car, Also I contacted My Hyundai service Technician who said Hyundai customer service never contacted them about my car, When they said they spoke with the technician. Also I received an Extended warranty on the 2.4 GDI engine from Hyundai who many Hyundai customers are or have dealt with.I also purchased an Extended warranty Which I believe should have been extended as well Thank You

NHTSA ID

11735056

Incident

Apr 17, 2026

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

NHTSA ID

11720509

Incident

Feb 16, 2026

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

NHTSA ID

11711848

Incident

Jan 2, 2024

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.

NHTSA ID

11688660

Incident

Sep 18, 2025

The turning signal gives the opposite signals sometimes.

NHTSA ID

11672900

Incident

Jan 4, 2025

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

NHTSA ID

11668087

Incident

May 5, 2023

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.

NHTSA ID

11660512

Incident

May 4, 2025

Location: [XXX] Description of Incident: On a rainy morning, while driving to work, I encountered a sudden lane cut-off by a speeding truck as I exited a school zone. I applied the brakes to avoid a forward collision, but the brake system failed entirely. This resulted in the loss of vehicle traction, causing the car to spin out uncontrollably. The vehicle collided with an island, bounced into oncoming traffic, and sustained severe damage, including: •Tires ripped off the rims •Front axle damage Injuries: I sustained a lightly sprained neck as a result of the incident. Vehicle History: The vehicle had been in the custody of the Hyundai dealership just days prior to this incident for an engine/powertrain recall and replacement. The dealership held the car for over a week to address the issue. However, shortly after retrieving the vehicle, the brake failure occurred. Observations and Concerns: •The brake failure occurred after recent service by the manufacturer dealership. •Hyundai vehicles are known to have documented brake system issues, which may have contributed to this incident. •This failure nearly resulted in a life-threatening accident. Action Requested: I am requesting an investigation into the service performed during the recall and the brake system failure. It is imperative to determine accountability and address any potential defects to prevent future occurrences. [XXX] [XXX] - Victim and incident reporter. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11636029

Incident

Dec 18, 2024

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

NHTSA ID

11618616

Incident

Oct 5, 2024

The contact owns a 2015 Hyundai Sonata. The contact stated that the ABS and traction control warning lights were illuminated. The vehicle was taken to the local dealer, where it was diagnosed that the ABS module needed to be replaced. The vehicle was repaired, but the failure recurred. The manufacturer was contacted, who opened a case, but no assistance was provided. The failure mileage was approximately 84,107.

NHTSA ID

11616128

Incident

Jan 1, 2024

Mileage

84,107 mi

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.

NHTSA ID

11615825

Incident

Jul 8, 2023

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.

NHTSA ID

11604420

Incident

Jun 25, 2024

Mileage

70,000 mi

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

NHTSA ID

11598813

Incident

Jul 3, 2024

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 [XXX], 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 ID: 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. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11595199

Incident

May 22, 2024

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.

NHTSA ID

11591538

Incident

Sep 22, 2023

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.

NHTSA ID

11588550

Incident

Apr 29, 2024

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.

NHTSA ID

11571014

Incident

Feb 3, 2024

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 the 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.

NHTSA ID

11570979

Incident

Feb 1, 2022

Mileage

60,000 mi

My break went out while trying to make a stop.

NHTSA ID

11561739

Incident

Nov 14, 2023

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.

NHTSA ID

11555151

Incident

Nov 3, 2023

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 .

NHTSA ID

11547288

Incident

Sep 4, 2023

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.

NHTSA ID

11543021

Incident

May 23, 2023

Mileage

144,225 mi

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.

NHTSA ID

11540349

Incident

Jul 5, 2023

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

NHTSA ID

11536873

Incident

Jul 27, 2023

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

NHTSA ID

11523748

Incident

Feb 24, 2023