general problems of the 2018 Hyundai Sonata

16 problems related to service brakes have been reported for the 2018 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 Hyundai Sonata based on all problems reported for the 2018 Sonata.

1 Service Brakes problem

Failure Date: 03/15/2025

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.

2 Service Brakes problem

Failure Date: 06/18/2024

The contact owned a 2018 Hyundai Sonata. The contact stated that while driving at 35 mph, a pedestrian alerted him that the vehicle was on fire.   the contact noticed that the rear portion and driver side of the vehicle was on fire.   while traveling around a curve the brakes became inoperable the contact jumped out of the vehicle. He contact sustained injuries to his left shoulder and leg and medical attention was provided.   there were no warning lights illuminated. The vehicle continued to roll as it was burning.   the vehicle crashed into a dirt mound at the end of a hill. The fire department was on the scene to extinguish the fire. There were four gallons of fuel on the ground. The vehicle was towed to tow lot. There was no police report fire or air bag deployment. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The insurance company deemed the vehicle a total lost. The failure mileage was approximately 105, 000.

3 Service Brakes problem

Failure Date: 02/09/2024

Vehicle 1 operating normally in traffic on rt 10/202 in westfield MA. Operator 1 notices alert on dashboard. As operator 1 looks down briefly and returns eyes immediately to the road, she sees vehicle 2 braking to slow or stop. Operator 1 depresses brakes, but vehicle does not slow as it usually does, nor does automatic emergency braking engage as it always has in the past. Front of vehicle 1 makes contact with rear of vehicle 2. Dashcam footage appears like brakes did not activate at all, either manually or automatically. Vehicle 1 airbags deploy. Westfield police respond, as well as westfield fire, who cut the battery cable. Vehicle towed to interstate towing, inc. Yard 5, 20 clifton st, westfield, MA 01085. (413) 593-1900 interstatetowing. Com. Owner 1 viewed vehicle at tow yard, and noted that the battery was completely melted, with only portions of the plastic casing along with internal plates visible. Much of the plastic and rubber components immediately adjacent to battery location were melted and deformed. As a layperson, it almost appears as though the battery was in the process of shorting out just prior to the collision, possibly rendering many of the safety systems inoperable.

4 Service Brakes problem

Failure Date: 02/24/2023

The contact owns a 2018 Hyundai Sonata. The contact stated that while driving at various speeds, the brake pedal would depress to the floorboard as a maintenance warning message would appear on the instrument panel. The vehicle was taken to a dealer; however, the dealer was unable to diagnose a failure. One day while driving the vehicle, an abnormal, tapping noise began to emit from the brake pedal upon depression. As the failure persisted, the pedal failed as the contact ran through both a concrete post and a fence, which were both damaged. The airbags deployed upon impact. The contact did not seek medical attention at the scene although she stated that she suffered bruising all over her body. A police report was filed. The vehicle was driven back to her house by a neighbor. The dealer and the manufacturer were notified of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 30,000.

5 Service Brakes problem

Failure Date: 02/02/2023

About a year and half ago, a lot of my engine trouble lights turned on while driving. It was sleeting at that time when the lights turned on and they're still on today. I paid to have the Hyundai dealer to check it out soon after the trouble lights first turned on. They diagnosed the problem as a faulty hecu. I would have had them replace this, but they estimated it would cost about $3800 to fix. This hecu malfunction is causing the following issues: abs does not work, traction control does not work, forward collision prevention does not work, brake auto hold does not work, cruise control does not work probably because it can't auto brake any more. I've had some scary times driving and trying to stop when the roads have been wet or snowy.

6 Service Brakes problem

Failure Date: 07/22/2022

As soon as I start to press on my brakes the vehicle starts violently pulsating and locks up. Took the dealership they said my rotors and brakes were fine and we're unable to give any reason for this. Without brakes I cannot stop my vehicle and it seems like a faulty abs but no light on dashboard. The engine consumes nearly 5. 2 qts of oil in 1000 miles. Being this is not normal I have no idea I was running out of oil as soon as I was changing it which could have led to my entire engine stalling out and causing me to wreck. It's putting my life as well as other people's on the roads and danger.

7 Service Brakes problem

Failure Date: 08/13/2021

1. Accelerator malfunctioned as I removed my foot to hit the brakes. The speed increased. When attempted to hit brakes, would not brake. The brake hardened up and car went through bank glass door and window. 2. It malfunctioned. 3. Vehicle is in the body shop. Will take to dealer when done 4. Police and insurance 5. No warnings.

8 Service Brakes problem

Failure Date: 02/12/2020

Rough vibration slowly coming up steering when braking to stop. Could be rotors or tires. Started a few months ago.

9 Service Brakes problem

Failure Date: 04/14/2019

I own this 2019 Sonata since 1/16/19. Was runing good at the first. But couple times start showing the engine light for seconds. But on April Sunday 14 2019 my car shows the engine light and the tire control stabilizer at the same time then the car start shaking lossing speed,the brakes getting hard and power steering. . Lucky I went at 10mph to 15mph. The vehicle will be placed in a temporary engine protection mode with reduced power and acceleration. No speed no acceleration then I park in a parking lot for towing at the nearest Hyundai dealership. Technitia found code( p0638 ) active code and (p211935002a00 throttle body carbon cleaning- adjustment and found rubber grommet stuck in the throttle body roved grommet. This cause trouble with the intake and injectors making the car limp and state in protection mode. I have lucky I wasn't in the freeway at 55,60 to 65 mph. O can be a different risk and dangerous for me and others drivers. Please take this note seriously before something worse can happen to others drivers . Thank you so much.

10 Service Brakes problem

Failure Date: 01/31/2019

Tl the contact owned a 2018 Hyundai Sonata. While driving approximately 5 mph, the vehicle independently accelerated. The contact depressed the brake pedal, but it failed to slow down or stop the vehicle. The vehicle crashed into a palm tree. An incident report was filed, but not a police report due to the fact that there was no immediate injury. The contact suffered a sore neck and a possible whiplash, but did not seek medical attention. The vehicle was towed to an independent facility. Kearney mesa Hyundai (4797 convoy st, san diego, CA 92111, (858) 278-7100) was contacted and a voice message was left. The manufacturer was not contacted. The cause of the failure was not determined. The approximate failure mileage was 500.

11 Service Brakes problem

Failure Date: 09/11/2018

2018 Hyundai Sonata. Consumer writes in regards to rusty brakes. The consumer stated the vehicle had issues start during cold weather. It would take about 15 minutes or longer for the vehicle to turn on. The battery needed to be replaced prematurely.

12 Service Brakes problem

Failure Date: 09/05/2018

Since day of delivery two years ago, the aeb system has malfunctioned in that while driving vehicle on any road type, the brakes come on with no warning or reason, have almost been rear ended three times. Dealer has never found anything wrong and insists the system functions as designed. The radar or camera systems have to have a defect. Toyota and Honda have had this issue but made efforts to correct either by recalls or service bulletins. Pedestrian detection has also never worked on this vehicle. .

13 Service Brakes problem

Failure Date: 07/30/2018

Tl-the contact owns a 2018 Hyundai Sonata. The contact stated that while driving approximately 35 mph, the accelerator pedal became stuck in the drive position. The contact stated specifically that the accelerator pedal became stuck at 35 mph and the vehicle was involved in a crash. The contact could not stop the vehicle, due to the stiffness of the brake pedal, which caused the driver of the vehicle to crash into the passenger side front door of another oncoming vehicle. All of the air bags deployed. A police report was filed. Both drivers involved sustained injuries. The contact suffered whiplash, cuts and bruises over the entire body. Medical attention was required. The vehicle was towed to an independent mechanic to be assessed for damages. The mechanic deemed the vehicle to be destroyed. A dealer was not made aware of the crash. The manufacturer was not made aware of the crash. The failure mileage was approximately 10,000. Ad.

14 Service Brakes problem

Failure Date: 06/14/2018

I had stopped my vehicle, putting emergency brake on, but still in drive. I stepped out of the car and it began to move forward on its own and I was not able to get back into the vehicle. It traveled quite a distance before running into some inanimate that caused it to stop. It was in a driveway behinds buildings and did eventually cross over a side street before stopping. I don't see why the emergency brake did not hold, even though not in park?.

15 Service Brakes problem

Failure Date: 05/01/2018

Tl- the contact owns 2018 Hyundai Sonata. The contact stated that while operating the vehicle the aeb(automatic emergency braking) system had malfunctioned. The contact indicated that on several occasions the vehicle failure to automatically stop when a second vehicle was present. The failure had occurred while driving in both reverse and while driving at highway speeds with the cruise control feature activated. The vehicle was taken back to dealer natleton Hyundai located at 1620 waukegan rd. , glenview,. Il. Of glen view ill. Who indicated that no problem was found and the vehicle was operating as normal. The manufacturer was notified of the failure but no assistance was offered. The failure mileage was 400. Jft.

16 Service Brakes problem

Failure Date: 02/02/2018

The contact owns a 2018 Hyundai Sonata. The contact stated while their vehicle was parked, the contact started the vehicle and attempted to make 3 point turn exiting out of their driveway the vehicle accelerated on it's own and went over their curb into their neighbor yard. The contact stated they depressed on the brake pedal to stop the vehicle, however the vehicle still accelerated in a slow speed before finally stopping. The contact was able to reverse and exit out of their neighbor yard and continue to drive to their destination, however the failure intermittently occurred several times after. The contact took the vehicle to a local dealer who inspected the vehicle but could not diagnosed the caused of the failure. The contact went to another local dealership (cars unlimited of suffolk llc 2096 NY-112, medford, new york 11763 phone: (631) 758-2200) but the dealer was not able to duplicate the failure. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 8,896 miles.


Other Service Brakes related problems of the 2018 Hyundai Sonata

Service Brakes problems
16
Brake Sensor problems
1
Abs Brake Fail problems
1

Sonata Service Bulletins
Sonata Safety Recalls
Sonata Defect Investigations