2020 Hyundai Palisade Brakes Problems

I was recently involved in an accident with my 2020 Palisade that I believe may have been caused by a brake failure. I was simply moving the vehicle from one part of a driveway to another when, as I drove over a drainage ditch, the brakes did not respond and the car suddenly accelerated into a tree. I sustained facial injuries and was transported by ambulance to a nearby hospital. The vehicle is currently at Canby Motors in Bel Air and is available for inspection. The vehicle has only been inspected by Canby Motors to my knowledge at this time. There were no warning lamps, messages or other symptoms of the problem prior to the failure.

PASSENGER SIDE REAR BRAKE CALIPER FAILED CAUSING THE BRAKE TO SCRAPE INTO THE ROTOR. THE EMERGANCY BRAKE REMAINED IN THE LOCK POSTION WHEN THE CALIPER FAILED. LOCKING THE CALIPER IN THE UP POSITION AND RELEASING BRAKE FLUID. DRIVER SIDE BRAKES, CALIPER, AND ROTOR COMPLETLY INTACT AND DOES NOT NEED REPLACING.

When driving our brakes are spongy, downhill braking control gets disabled and tells us to control our speed even when going speed limit and below. Increased braking distance is needed, brakes are to the floor. When taken in for this concern we were met with, no issues noted on inspection. The brakes are getting worse and we feel as though this is a hazard for driving.

On 1/24/2023 I was driving down the road from my home to go to work when, as I was going down an incline, my brakes started pulsing and I lost all braking ability. I drove thru a stop sign, into the intersection and was able to steer the car down the road. It was down a hillside. I was able to eventually stop the vehicle approximately a mile and half from where the brakes failed. I was instructed by the dealership to have the car towed to them so they could evaluate what happened. I did this. The dealership is trying to assess what happened. After 1 week, they replaced all 4 tires, did an alignment and replaced a leaking rear shock. The vehicle had 36,201 miles as of 1/24/2023. The dealership claims that the wear on the tires and the vehicle being out of alignment caused the wheel speed sensor to misread the speed and triggered the ABS to unlock all brakes. When this happened, all the warning lights for the braking system came on: ABS, Auto Hold, Traction Control, Forward Colision Avoidance System, Downhill Descent Control. I had nothing to stop me. Thankfully, no other vehicles came thru the intersection when my vehicle lost control. The dealership has, after a week, supplied me with a loaner vehicle. They are trying to duplicate the loss of brakes and all the lights that were activated when I lost my brakes. I also mentioned to the Service Manager at the dealership that I have repeatedly been asking the technicians to check the tires and to rotate the tires at our last few service appointments and had been assured the tires were fine and the tire rotation would be done. We normally have the tire rotation done every 7,000 miles due to the fact that it is an AWD. If this had been done as we requested, how could this happen? Wouldn't someone have noticed uneven tire wear? Our major concern is that when the brakes fail, you have no backup braking system in place. Is there something wrong with the programming for the electronic braking system?