Service Brakes Problems of Hyundai Sonata - part 1

The contact owns a 2013 Hyundai Sonata. The contact stated that while driving 45-50 mph and depressing the accelerator pedal, the vehicle failed to respond and hesitated. The brake and the hybrid system warning lights were illuminated. The contact was able to pull to the right side of the road and waited for her husband to arrive. The contact turned off the vehicle and restarted the vehicle, and the vehicle operated as intended. A dealer was contacted. The vehicle was taken to a dealer, where it was diagnosed, and determined that the hybrid ecu needed to be replaced. The contact stated that the dealer checked the error on the brake failure light that was illuminated, but had not yet gotten a response back from the manufacturer. The vehicle was taken to auto zone where it was diagnosed, and determined that the hybrid ecu needed to be replaced. The contact stated that the failure had occurred on several occasions for the past three years. The engine was replaced, and the vehicle was repaired. The manufacturer was not notified of the failure and informed the contact that they have not heard from the dealer. The approximate failure mileage was 128,000.

See all problems of the 2013 Hyundai Sonata 🔎.

The contact owns a 2017 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, the contact engaged the hybrid function on the vehicle and the vehicle unexpectedly stopped. The contact stated that the accelerator pedal was depressed; however, the vehicle took several minutes to respond. There were several unknown warning lights illuminated. The contact stated that when the vehicle accelerated, the vehicle jerked abnormally. The vehicle was taken to the dealer, where it was diagnosed and determined that the brake sensors had failed and needed to be replaced. The vehicle was repaired; however, the failure recurred. The manufacturer was made aware of the failure. The approximate failure mileage was 130,000.

See all problems of the 2017 Hyundai Sonata 🔎.

Good day, please note that most of my communication with Hyundai has been over the phone. I sent one an email shortly after the event, and after following up on the phone, I received this following string separately. I can forward you more along the way, but Hyundai is in possession of the call recordings. I was hoping they would cover my repairs, my engine had a lifetime warranty, but during this process I learned that there was a recall for this car that I was never aware of as the new owner. I needed a software update to get any repairs covered. Please reach out to me for more info!.

See all problems of the 2011 Hyundai Sonata 🔎.

Driving came to a stop ,light turned green made a u-turn to go to the gas station heard a pop noise smoke came from inside the car tried stopping it but the brake pedal sunk into the ground pressed my emergency brake it was seized wouldn’t go down (never had that issue my brakes always work ) I smelled brake fluid and seen the abs light on the dash then the power started to go out and my girlfriend almost got trapped in the car.

See all problems of the 2012 Hyundai Sonata 🔎.

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.

See all problems of the 2015 Hyundai Sonata 🔎.

The part of hand break assembly that’s inside the disk break (the drum assembly) fell off when the dealer ( patrick Hyundai, schaumburg, IL) tried to adjusted. I went to the dealer because the hand break stop to function. I suspect very bad design of the whole assembly disk and drum break. Also the dealer stated that all assembly was rusted.

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.

I have tried to have my Sonata 2013 gone over gor the previous ownership never gave me any ro in this bias was stared. This previous wherebpurchased and worked , was not on the the up and up. Vwhere ,steele Hyundaibwhen owned know keating group purchased. I'm asking ngo iver the safety I the setvice ussues t hat Hyundai is awarevand have all thr campsign numbers looked up I do not believe since ive oened the car ,sonata anythingbwas donen,agein nothing evervstated and knly oil changes done without any given paper wirk given on recalls except oil changes. Ssues and . So wanting, asking that no chargeb,go iver make sure for the situation posted and Hyundai posts in 6bareas yes , go over for the brake system is causing the hybird tobshit down and the car with squiggly line know comes on fuses and the the brake power booster sensor is the problem gor I had the Sonatanon computer that came up also shavings in the engine campaign 162,994 251 to go iver no charge to make sure it was done and whatever faulty be replaced no charge . Charge to Hyundai for the problems if safety and service are on line stating should be taken care if no charge to consumer. Nothing is happening, just the insanity definition, to resolve. I ask forba new case manager I'm entitled to, can't turn down ,but is and lies about contact. Once, returned call no return call. Hope in the next 24 hours this be resolved so I can have this situation at no charge,don't believe ever done,no paper work in my possession, never had oil changes. Never told ,never anything from Hyundai. Almost got reat ended will send bill any to Hyundai tontalje carebofbas well something know NHTSA isn't helping after many complaints as this. Hyundai admits no charge for t his situation ,insanity and no cooperation just arrogance and belligerence . Mileage has nothing to do with. Engine should be looked at for whatnot NHTSA rant about engine in my Sonata hybird and engine,problem still exists at.

This has been going on nothing resolved and no cooperation. Im going yo locate an attorney that really don't want to. Requesting this be ,the situation be loojedvatb,at no chargevand replace whatbwasvsuppisedly replaced by steele south loop Hyundai ,houston texas ,sold to keating groupbbased out if texas. What I'm asking isn't make sure itvwas done ,and whatever replaced ,inexpensive to do to. Repkace the parts , and computerbprograned to make current no chsrgebto ne for Hyundaibsta t ES in line and would not be getting emails from NHTSA as I do . Hope finally 24 hours resolve, cooperation and done finally.

The contact owns a 2012 Hyundai Sonata. The contact received notification of NHTSA campaign number: 18v934000 (engine, fuel system, gasoline). The contact stated that while driving 20 mph, the vehicle stalled. There was an abnormal knocking sound coming from the vehicle. While driving at an undisclosed speed, the vehicle stalled after five minutes. The engine and the abs warning lights were illuminated. The vehicle was towed to the residence. The contact called the local dealer and was informed that the maintenance records were needed. The contact was using an independent mechanic for maintenance and did not have the records. The vehicle was not diagnosed or repaired. The manufacturer was contacted and opened a case. The failure mileage was approximately 100,000.

I am driving and all of a sudden the brakevsystem lighthouse on bthe hybird system begins to fail and ge car loses power I almost got hit 4 times already, from this . The system starts to ding ,shut down and states to bring to a certified mechanic ir dealership. Hyundai has on line tgeybarevaware and this problem for this model and should be taken care if no charge for bis a problem for this year model and hybird model 3 diff we rent areas on lounge through Hyundai it states this a known issue. The part to replace and had a certified ase mechanic on computer look and went through the computer system and stated it is a power booster brake sensor. This is starednin 3 different areas bon Hyundai websitebfornthe model and year. Suppised the recall in the nowhere done oct 8 2024 but never had any letter of recall nor the dealership contact me anmboutbthis ,but had an oil change done at or about the supposed nrevapl been done. I have no documentation of this nor any given so inwantb,asking give me type kit needed, to take care nofbthis. . No documentation ofbanybkjnd given exceptb,no invoice given done, so I would like tge kit for fuses do go bad. Anything can be put in computer stating what is supposed done but not. Im not asking except to rake carebof this no charge for Hyundai it's free in 3 different areas should be done non published recall . For this year. All online. I asked for cooperation in this matterband the dealership that purchased has been sold to anormther and banner dealership stated in line ,not responsible for previous dealerships problems etc,take it up warmth them the steele group out if canada,that sold to ge jeating group that know owns this dealership . . I asked for a newbcasemmanager ,drniedband I have a rightbtocaskband should be changed for her arrogance, belligerence in nmattrr should not be. I purchasednthe brake booster sensorbforbwhat fred bactyally a little less with labor, beingshipped from Hyundai . Dot.

Sudden brake failure while driving at speeds around 40 mph, where both the accelerator and brakes became unresponsive, forcing me to coast before regaining limited braking ability after repeated pumping or having to "restart" the car completely. During these events, loud grinding or dragging noises and vibrations were present. Despite adequate brake fluid levels and pad condition, the brake pedal went to the floor. Could be a potential hydraulic or booster failure. It is available for inspection upon request. I was in the car with a significant other at the time of the incident, this happened around 9 times on a very busy highway during a rush. I have been able to reproduce the problem on my own but has now been inspected by a dealer or independent service center. Online resources indicate others with the same symptoms under same conditions have. The component has not been manufacturer, police, insurance representatives or others. But I have very recently (around 4 months ago) passed a vehicle inspection. There were no warnings or other symptoms prior to failure, it's very sudden and having no idea when and where it would happen makes the car inoperable.

With no warning my car left me sit on the side of the road and when started the engine made an awful knocking noise. Hyundai denied to replace the engine despite there being at least 2 engine recalls. When I asked why they said it was due to no maintenance records so I provided them with maintenance records like they requested and then they deny it again and say they aren’t replacing the engine because the problem with my engine had nothing to do with the 2 engine recalls my vehicle is affected by.

The electrical in the entire car is malfunctioning. Sometimes the brake lights don’t work due to wiring, other times the seats control don’t work and the cables to battery is not connected/firing correctly. Has an entire electrical issue.

See all problems of the 2014 Hyundai Sonata 🔎.

Braking system failed on my Hyundai Sonata hybrid 2013. I was driving on the highway and suddenly the vehicle started a constant beeping noise and the dashboard illuminated with a message that read "hybrid system warning! safely stop and do not drive" as I driving 70 mph on the highway, causing me to have to swerve onto the shoulder to avoid being rear-ended by vehicles traveling behind, this is a very dangerous issue, and Hyundai is placing safety of others on the lower rung of their priority list. I had the vehicle taken to the shop where I was initially told that the issue is contaminated braking fluid, the need to replace brakes and the brake master cylinder. Shortly after being notified of the issues that technician diagnosed I agreed to have these items replaced. However, when I went to pickup my car after being notified that services were "completed" the vehicle continued to have the same issues, the vehicle never made it off of the Hyundai car lot. The vehicle has been with Hyundai for over 2 months and suddenly I am being told that there is an abs issue and that it will cost over 5,000 dollars to complete repairs. I scoured the internet and noticed that there are many other complaints similar to mine.

I started the car, put it into gear and then the breaks wouldn’t work. The car dash said something like check breaks hybrid system failure do not drive. There is not recall on my car but the Hyundai service department doesn’t know how to fix it. This is the second time it’s happened. I’m scared to drive it. Please investigate!.

I drive a 2012 Hyundai Sonata limited. After a recent fill-up, I began experiencing delayed acceleration, engine hesitation, and what appears to be misfiring—especially at low throttle. Most notably, the brake lights stay illuminated even when the car is turned off, which drains the battery and poses a major safety hazard. I scanned the vehicle with an obd-ii scanner and received code p0504, which points to a brake light switch malfunction. I also noticed that pressing the start button with my foot off the brake still starts the engine instead of going into accessory mode—confirming abnormal brake signal behavior. I replaced the brake light switch, which temporarily fixed the issue, but the symptoms returned within a day. After researching, I found there was a recall (NHTSA 15v759000) for a nearly identical issue involving the brake light switch and stopper pad. However, my VIN is not listed, even though I am experiencing the same safety-critical symptoms. This issue poses a significant safety risk on the road, and I believe my vehicle should be included in the affected population of the recall or issued a technical service bulletin extension.

The issue has happened multiple times while driving, sitting in traffic, or parked idling. The brake light comes on and starts flashing, alarm chimes, brake pedal goes to the floor seems to not have any hydraulic pressure, the brakes grind like I have no brake pads, and essentially I have no brakes. If I turn the car off and on it goes back to normal. I took it to have it checked for a diagnostic code, there were none.

Brake calipers are getting stuck often damaging the rotors and pads. This happens even for new calipers and rotors that won't last more than one year after replacement. The parts were original from manufacturer. The rear and front brakes were randomly getting stuck on one wheel after a period of using brakes. This put the vehicle in danger of getting fire from overheating rotors or increasing the risk of a crash because of an unusable brake system. This incident has repeated over time from 2017 till 2025 inducing big spendings for fixing brakes.

See all problems of the 2009 Hyundai Sonata 🔎.

I recently purchased a 2025 Hyundai Sonata. I’m writing to raise a concern regarding the height of the brake pedal in this vehicle. Both my wife and I have observed that the brake pedal seems noticeably higher than the gas pedal. This positioning requires extra effort to lift the foot during normal driving, and we are concerned that it may delay reaction time when moving from the accelerator to the brake — especially in emergency situations. I contacted the service department at the dealership to inquire if this pedal height is standard and whether any adjustment is possible. However, I have not received a response. I would appreciate it if you could confirm: is the brake pedal height in the 2025 Hyundai Sonata within your design standards? if any manufacturer-recommended adjustments or modifications could improve pedal accessibility and response time. This is a significant safety concern for my family, and I would be grateful for your prompt attention and guidance.

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.

Unknown cought fire under the hood was engulfed within minutes.

The contact owns a 2018 Hyundai Sonata. The contact stated that upon starting the vehicle, the abs warning light illuminated. The vehicle was taken to an independent mechanic, where it was diagnosed and determined that the abs module had failed. The vehicle was not repaired. The dealer was notified of the failure. The manufacturer was not notified of the failure. The failure mileage was approximately 40,000.

See all problems of the 2018 Hyundai Sonata 🔎.

The car has abruptly applied braking while driving. I took the car to get checked after that and I was told that there was nothing wrong except that the pads will need to be change sooner than later. I mechanic did tell me that it could be a safety issue because it was an uncontrollable. I than took the car to the Hyundai dealer for them to diagnose the car. They proposed that I change everything, including the brake pedal, which to me, sounded very fishy. One week ago, while driving, the car suddenly jammed on the brakes again. This particular time, it was also emitting smoke, either from the front or the bottom.

The contact owns a 2014 Hyundai Sonata. The contact stated that while driving at an undisclosed speed, the hybrid braking system warning light illuminated. The vehicle was taken to two separate independent mechanics, where it was diagnosed with abs module failure. The contact was informed that the abs module needed to be replaced. The vehicle was not repaired. The vehicle was taken to the dealer, where it was diagnosed with abs module failure. The contact was informed that the abs module needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure, and a case was filed. The contact had received an unknown recall notification; however, the dealer and the manufacturer informed the contact that the VIN was not under recall. The failure mileage was approximately 90,000.

Was driving in reverse out of garage and abs brakes were applied like I hit a patch of ice stopping the car. Released when applied pressure to brake. Then while on highway going 60 miles an hour the emergency brake system went on for no reason applying pressure and red light came on the dash with a left facing arrow. System released within a few seconds but scared me and I still have to drive this car on highway.

See all problems of the 2021 Hyundai Sonata 🔎.

The turning signal gives the opposite signals sometimes.

In October of 2023, I was driving my 2012 Hyundai Sonata hybrid to the laundry mat about a quarter of a mile from my home. I stopped at a stop light and all of a sudden, a warning sound burst from my dasher board. The message stated, "hybrid warning-do not drive: check brakes". The brakes completely stopped working, the pedal was to the floor and the accelerator was stalling. After managing to get the vehicle back to my home, naturally I went to the dealership (langdale Hyundai of valdosta) and informed them of the issue. They informed me there was no issue, charged me for a diagnostic and sent me on my way. Once I provided proof of my car stopping mid-drive, they began to check wiring and such. What they told me the issue was is a hydraulic power unit. I had it replaced, still the same issue "check brakes". I only have 116k miles on this car, bought it with 72k in 2021, so I haven't driven it much. It spent 8 months in Hyundai dealership in holiday, FL for a brand-new hybrid battery in 2022. I have been looking online for anyone that knows more about this issue so I can get it resolved. It turns out there are thousands of people who are just like me. I believe this is indeed a recall issue. I believe this is an issue is an emergency issue, brakes giving out while driving is an issue that needs to be addressed. This has been happening for years, and Hyundai has not done one thing on it. It's happening with newer vehicles as well as older. Langdale Hyundai of valdosta was not much of a help at all, to be honest, I don't trust their workers at all. I believe they do nothing and charge customers for the max that they can.

After starting, got a warning stating check hybrid braking, do not drive. When going forward, brake pedal went to floor, heard heavy grinding noise and vehicle stopped accelerating. Had to use the emergency brakes to avoid an accident. Hyundai says they can’t find a problem. Now I can’t even drive it back to the dealer! did an internet search and many other hybrid owners have reported the same issue. I just want to have Hyundai buy the car back at this point. It only has a little over 50,000 miles on it.

The contact owns a 2016 Hyundai Sonata hybrid. The contact stated that while operating the vehicle, the parking brake light remained illuminated. The vehicle was taken to the local dealer to be diagnosed. The contact was informed that the abs control module was faulty and needed be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 149,000.

See all problems of the 2016 Hyundai Sonata 🔎.

I was driving and my car started beeping and the wheel jerked to the left and my car slowed down from 65mph to 20mph and almost caused me to have an accident. After I replaced the breaking module, my battery started shorting out and my car once again jerked off to the side and then slowed down abruptly from 65 mph to 20mph.

I was driving I seen smoke then full flames on my windshield and I tried to stop and put my car in park to get out but my brakes stopped working and I couldn’t get the gear in park so I opened the driver door and had to jump out of the car . I had an engine replacement a year before for it being recalled and police and firefighters were on scene after incident.

My engine block or engine has a hole in it. All of my oil came out and my vehicle shut off. My brakes as well is not hard when pressed on, so I would have to pump it till it hardened. My safety and others safety was at risk while I was driving because my vehicle was not coming to a complete stop which could have resulted in a serious or fatal accident. As well as my engine block blowing making all the oil in my vehicle leak all on the road while driving on a busy road. Yes the problem has been confirmed but I was told that my car does not fall under the cars listed with the same issue on the recall list. No it has not been inspected by the manufacturer or police or insurance rep because I am being told I have to pay out of pocket and I am not able to afford the prices being told to me for an issue that I have not caused. There were no warning lamps or anything prior to this incident. I have went to many different mechanics for a diagnostic for my vehicle but they all say my vehicle is fine or they do not know what I am talking about.

Active hydraulic booster failed while driving. 2012 with 114,000 miles on it. Brand new engine and transmission installed from prior recalls. Hyundai dealership said it was covered under anything and would cost $5k to get fixed.

On November 4, 2024 while coming to a stop in traffic, the brake pedal went to the floor without any warning. Just prior to using the brakes, there was no feeling of softness in the pedal, and no indication a low pedal situation, and there was no indicator of pending brake failure. The brake light indicator only lit when the brake pedal went to the floor. I was fortunate that I did not rear end the vehicle ahead, or more seriously had there been a jay walker, because I quickly pumped the brake pedal with what little braking I had while shifting the automatic transmission to second gear. I was able to slowly drive ten miles home in second gear while using the hand brakes. Eom.

See all problems of the 2008 Hyundai Sonata 🔎.