Automatic Emergency Braking problems of the 2021 Hyundai Santa Fe

Was coming off an exit on the interstate and started slowing down. My brakes act like they didn’t want to work. Grinding and the pedal was twitching under my foot. The car stopped thankfully, but then all linda of lights came on the my dash and will not go off. And 3 warning come up!.

On 1/1/26 while traveling on the highway with no traffic in front of or right of my vehicle the adas emergency brakes applied themselves and slowed the vehicle nearly causing my vehicle to be rear ended. Vehicle is available for inspection. Faulty assistance nearly caused a rear end collision along the highway. Not aware of adas being tested inspected although multi-point inspection was done 10/2025. No warnings prior to incident.

For a few month now the light of abs have been turning on. At the beginning there was no diagnosis specific, cause kept turning off. Two or three months ago again turn on and gave code of back caliper on the left and was changed. An now yesterday August 5, 2025 the diagnosis its need of change of the sbs module whole.

I hadn't been begging Hyundai to help remove a public safety risk for years ! today, the service lady witnessed my car have a severe safety defect. Although initially offering a rental car, ultimately denied due to my inability to provide insurance until the 1st. My insurance is valid until tomorrow. N they refused to provide the rental without the insurance being dated for 4 days from today. The man in the service office asked if I needed a ride home!? suggesting I drive the car home. Hyundai has witnessed this cars emergency parking failing, and are aware that this car has rolled out of gear two times, w my son in it !!?? until today, claiming unable to "duplicate" the defect. And unable to "substantiate " my claims due to not being able to duplicate the deflect. They duplicated the defect today. The car no longer has a safety system, that safely parks the car, when the door is open. The safety system fails, at more then half of the attempts,engage and the car will roll in either direction with the car door wide open the service department duplicated the defect today. They claim to have documented the defect . I would like to believe they will finally do what is right. . The realistic fact that they have chosen to disregard the safety of the community, and refuse to offer the rental car, is extremely dangerous to the community and neglectful to the laws of the safety act and my consumer rights. With now, two (not at fault) rollaway accidents , insurers are refusing n to provide coverage for the vehicle. Some only offer liabilit, or want 4 xs the quoted rate. Hyundai is aware that this car is defective. . Hyundai has a recent consent order, for over 54 millionth dollars, for untimely recalls and falsafying reports to the nhsta . They are now, as they then, are in violation of the safety act and the nhsta consent order with kia in the theta ii engines class action the purpose of the safety act, is to prevent serious injuries, from known defects before.

The automatic emergency braking system activated without there being any vehicle in front. This was on a highway at 60 mph. It lightly braked for a couple of seconds with the warning light flashing and beeping as well. There was no prior indication prior. I will be taking vehicle to dealer.

April 2022 my 2020 one, Honda Santa Fe started rolling backwards in rolling to a flagpole as I was walking away from the car. I tried to to catch up with the car. It had my family inside screaming. But I was unable to stop it from slimming into the fireplace. I let Hyundaiusa know. They recommended that I take the car to the dealer. They promised to reimburse me for rental car after the diagnostic came back. They found nothing wrong with the car and never paid for the reimbursement now September 2023. Same thing just happened again. I was in mcdonald's drive through and I drop my debit card so I got out to get my debit card. I got out of the car and had to close the door and as I bend down at sensed the car start starting to pull away. The car once again started running away for me. I was outside the vehicle, but I was able to jump in the car and apply the brake before it slammed into mcdonald's. I have made a police report. And I have a witness from mcdonald's that saw the incident. I had already reached out to the attorney general's office about the first time the car rolled away from me in April 2022. They claim that my Hyundai found nothing wrong with the diagnostics. There was no argument I can make except for being called a liar. The mechanic did a little demonstration showing us how the safety mechanism in the Santa Fe makes it impossible for the car to roll out of park if the doors open or. How it's impossible. Even if the door is open, it shifts back to park. If you hit the drive button with the doors open it automatically shifts to park. . . So there's supposed to be "no way. The car can shift out of park into drive or neutral. " it rolled away in 2022 April, and it did it again September 2023.

The automatic emergency braking has engaged 6 times while backing up and there has never been anything behind the vehicle.

There were 2 instances where my vehicle stopped. Once I was driving 15mph and it said “put car in park”. The 2nd, I was driving 45mph and the vehicle said “step on the brake to start car”. I have also had 2 instances where my odometer just keeps going up and down. He 2nd instance, the car was making a ticking noise and hazard along with other lights were flashing.

While driving the crash avoidance emergency braking came on out of nowhere, and the steering locked up. I was driving on a straight and level roadway with no vehicles in front of me when suddenly the whole dash lit up with warning lights and the car, a 2021 Hyundai Santa Fe, came to a emergency stop, the steering wheel was shaking and wouldn't turn. This was the second time this happened. The first time on 09/29/22 I called the car dealer and was told that "they knew of the problem and that there was no remedy". This is extremely dangerous, both times it happened while I was driving on a highway at a steady speed, thankfully the roadway was dry if it had been raining I would have probably crashed.

Emergency braking comes on with no vehicles in front for 1/4 mile. Passenger front seat belt is no working properly. Caution collision comes on sporadically. Clock does not show correct time. Stop-start system works sporadically. A/c fan blows out defrost sometimes. Remote start does not always work or shuts off too soon. Case manager does not return calls. Changed case manager but no better. Hyundai does not care.

While driving in the fast lane on the freeway at speed limit the car suddenly began to slow/stop, after which a warning flashed on the display that said danger, collision imminent, or something like that. There was no one close in front of me when that happened. This exact scenario has happened three times now in this car, in the same way! I felt my life was endangered every time by the sudden and unnecessary braking of my car.

The forward collision system is automatically being activated without any car or object near the front of the vehicle. It happened 3 times while on the freeway and highway. The system automatically slams on the brakes, the vehicle swerves a little to left and right due to the sudden application of the brakes, and a large red waring indicator appears on the dash. We were nearly rear ended while travelling about 65 miles/hr because of this. We turned off the system, but every time the car is started, it automatically turns this feature on!! so you always must remember to turn it off. We just bought the vehicle brand new. If this isnt fixed, we fear we will be rear ended on the freeway, or make tail gaters very angry.

Unnecessary emergency brake activation has occured 3 times. Vehicle lease new 3/31/2021. 1. First incident late April, early may at approximately 1,000 miles. Cruise control was not on and car abruptly stopped when there were no other vehicles in front of mine. Traveling at about 35 miles a hour on local two lane road. (activation setting on normal) 2. Brakes activated at highway speed of about 60 mph. Car was passing on right side. No threat in front of vehicle. Cruise control was off. (activation setting on normal) 3. Was following well behind the car in front of me at approximately 30-35 mph. Other vehicle turned right into parking lot and was completely off the road when brake warning appeared on dash. (activation setting on "late" warning) we are concerned we will be unnecessarily rear ended and causing a multi car accident. Vehicle was in for service 8/2-8/3/2021. Dealer did all they could including 62 mi test drive. Per Hyundai, no parts were replaced due to the inability to dupicate the problem.

Message: I own a 2021 Hyundai Santa Fe with the forward collision-avoidance assist feature installed and activated. The forward collision-avoidance assist did not function properly to stop my car to avoid a low speed impact. I applied the brakes to stop. I could not avoid impacting another vehicle. The damage was minor. Hyundai did inspect my vehicle braking system on June 8 at Hyundai of cool springs. I was not provided full report on findings/corrective action. Hyundai America was supposed to provide a follow up report. I was called today and the Hyundai representative had no details on the brake inspection to share with me. I am suspicious. I think Hyundai is hiding a safety issue. I am reporting this event so the ntsb can contact Hyundai to determine if this is a safety defect needing corrective action. The Hyundai forward collision-avoidance assist is designed to help detect and monitor the vehicle ahead or help detect a pedestrian or cyclist in the roadway and warn the driver that a collision is imminent with a warning message and an audible warning, and if necessary, apply emergency braking. Ref: Hyundai owner's manual, chapter 7, page 7-2 on page 7-6 the system operation is described: system operation basic function system warning and control the basic function for forward collision- avoidance assist is to help warn and control the vehicle depending on the collision level: ‘collision warning’, ‘emergency braking’ and ‘stopping vehicle and ending brake control’. Otm070143n collision warning • to warn the driver of a collision, the ‘collision warning’ warning message will appear on the cluster and an audible warning will sound. • if a vehicle is detected in front, the system will operate when your vehicle speed is between approximately 6~112 mph (10~180 km/h). • if a pedestrian or cyclist is detected in front, the system will operate when your vehicle speed is between approximately 6~53 mph (10~85 k.