There are 4 owner-reported brakes complaints for the 2021 Hyundai Santa Fein NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
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.
The automatic emergency braking has engaged 6 times while backing up and there has never been anything behind the vehicle.
The contact owns a 2021 Hyundai Santa Fe. The contact stated that while his wife was driving at various speeds, she had to depress the brake pedal to the floorboard to stop the vehicle. The contact stated no warning light was illuminated. The contact called the local dealer and made them aware of the failure. The vehicle was not diagnosed or repaired. Upon investigation, the contact associated the failure with TSB: 21-01-181H. The manufacturer had been informed of the failure. The failure mileage was approximately 58,800.
While driving the car in cruse control the speedometer would jump up and down rapidly making the car accelerate and break. The warning lights come on saying the forward, side back sensors are off. At times stepping on the breaks a plastic bottle crunch sound will occur but the breaks were fine. I scheduled a repair but was still driving the car. Then I approached an intersection and the light was turning green to yellow so I stepped on the breaks only to have the pedal go to the floor without resistance and no breaks at all. I had to drive through a red light endangering myself and others at that intersection. I pulled into a parking lot and the breaks were working again. Car has been towed to the West Herr Hyundai Dealer on Transit Rd Williamsville, NY for repairs.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 25, 2026