Which parts fail
Components named in complaints (automatic emergency braking, adaptive cruise, lane keeping, backup camera).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2021 Hyundai Palisade owners, lightly cleaned up (personal details are redacted by NHTSA).
While driving the vehicle ahead brake suddenly. When I applied the brake pedal, it felt abnormally stiff/stuck and did not provide Norma breaking response. Th vehicle did not decelerate as expected despite immediate pedal input. At the same time, the Forward Collision Avoidance Assist system did not activate or provide any braking assistance. Due to the lack of effective braking, I was unable to stop in time and a collision occurred. The primary concern is a potential failure or malfunction in the braking system occurring prior to impact combined with the apparent failure of the automatic emergency braking system to engage. This created a situation where the vehicle could not be stopped under emergency conditions posing a serious safety risk
The contact's friend owns a 2021 Hyundai Palisade. The contact stated that while driving 70 MPH, the emergency automatic braking inadvertently engaged. The emergency braking system warning light was illuminated. The driver had to manually release the parking brake. Additionally, while driving a stone struck the front windshield causing a crack. The vehicle was taken to the local dealer and the contact was informed that the vehicle was working as designed. The contact was also informed that the windshield was on backorder. The vehicle was not repaired. The manufacture was notified of the failure however, no further assistance was provided. The approximate failure mileage was 10,000.
From driver: "While traveling westbound on John Lynch St, I approached the left turn lane heading southbound on Valley St. I engaged the brakes and began navigating the left turn at approx. 30 MPH. While turning, the vehicle's "Lane Assist" engaged preventing me from completing the turn. Halfway into the turn, the vehicle continued westbound, hopped the curb, and collided with a stationary road sign that was not in use. I continued through the intersection and pulled off the roadway." Follow-on questions: 1) How fast was the customer traveling when they were actively turning? A. 30 MPH, which I am assuming was the approach speed. To the best of the vehicle operator's recollection, the approach speed was appropriately 40-45 MPH, with an active turn speed of 30 MPH. 2) What was the recent usage of the vehicle before the incident? Was it used that day? …
On [redacted], after leaving an appointment at an office building, I returned to my vehicle and noticed that the driver's seat recline function was not working properly. The seat was already pushed forward to its highest position and would not recline further. I was still able to enter and operate the vehicle somewhat but remained parked. I reviewed Hyundai resources to see whether there was an update or known issue related to the seat concern. When I could not resolve the issue through available resources, I contacted the Hyundai dealership in Henderson. I provided my information and explained that the driver's seat recline function was not working. I was transferred to Hyundai Customer Service. …
Component/system, available for inspection? Rear visibility system - AVN head unit's processing of the rear camera image. On shift to reverse, screen flickers, shows blinking green, or no rear image. Vehicle available for inspection. Original camera was replaced Jan 2026 and retained by the dealer, not returned. Safety risk? Daily driver used for school pickup. Failure is warm-restart dependent - engine running, repeated shifts into reverse - which is exactly the pickup-line condition. Rear visibility is lost while children move behind the vehicle. System works reliably only after 25+ minutes shut off. Reproduced/confirmed by a dealer? Yes. Crain Hyundai of Bentonville, RO H3CS1330630, 1/13/26. Camera replaced; failure persisted. Same RO then states the head unit "IS GETTING TOO HOT" and needs replacement. No further diagnosis performed. Inspected by manufacturer, police, insurance? …
Hyundai claims that this is a "Start-Up" safety feature (meaning that it is designed to re-activate itself every time you start the car, even if you had deactivated the feature), and that there is nothing that they can do about overriding this since it is a manufacturing issue. While I appreciate the notion of Hyundai trying to promote safety, I continue to be very upset by this because the system is way too sensitive and has already on 2 separate occasions, caused the brakes to virtually lock-up involuntarily at freeway speeds on the freeways, even though I was otherwise completely in control of the vehicle and certainly not on the brink of any type of accident prior. I continue to contend that this feature is dangerous and that it certainly could cause an accident. …
Environment: Passing a single car on a two lane deserted highway. Daytime, sunny, no rain. Issue: The vehicle's emergency braking system activated (brakes were automatically activated along with the emergency braking cue in the instrument cluster) when the vehicle was returning into the right lane, almost causing a collision between the two vehicles at 85 mph. This occurred a second time 15 minutes later under the same conditions. The car was taken to the dealership for inspection and repair. The dealership test drove the vehicle and could not replicate the issue. Hyundai Engineering noted that since they were not able to replicate the issue and there were no active codes there is nothing wrong with the vehicle. If the radar is functioning properly, there must be an issue with the software of the vehicle.
On April 22nd my camera worked on my car but did not prompt warnings - I was in a parking lot and was backing up and tapped the car behind me. It is then that I noticed no beeping on getting close to the car. No damage to either car fortunately as they stated I was going ever so slow. On April 23rd got it in to the Hyndai dealership service department and there was another vehicle in there for the same issue I was told by them. WELL..... was told there is no recall. They replaced a harness I was told and final bill was $1126.30. NOt under warranty because my car has 113,000 miles. I would be glad to provide the final billing. I am reporting as there seems to ba an issue with this and I would hope that it gets addressed and if so would like my bill of $1126.30 reimbursed.
Windshield cracks with the slightest impact. After 2 replacement windshields and camera calibration performed four times, the vehicle still strays into oncoming traffic lane and over the fog line with lane keep assist and lane following assist activated. camera has been calibrated three times at Safelite and one time at Hyundai dealer. The LKA & LFA systems were PRECISE IN THEIR OPERATION WHEN I PURCHASED THE VEHICLE. Now the vehicle self steers into oncoming traffic with no warning until the vehicle is over the center line. Scary as hell. Apparently Hyundai has defective and weak windshields across the board according to many internet sources. Also, apparently the recalibration procedure is not working, causing a major safety issue in these vehicles.
I was driving in the highway in fairly heavy rain. My lane departure system went offline first. Next my forward collision went offline. Shortly after that my check engine light came on and the vehicle started shaking. I stopped under a bridge and waited for the rain to slow. I turned the car off and on, but the issues remained. I was forced to drive 10 miles, at 30 mph, on the highway, with hazards on, to a hotel. This caused an unnecessary unsafe situation. The next day, I took to the dealer. The car ran fine. They reset the codes and said it was likely water getting into the cylinders causing 4 and 6 to fail. I really dont feel a car should do this from driving in the rain. This also caused me an unnecessary hotel stay.
Collision Avoidance complaints in other Palisade years
Frequently asked questions
How common are collision avoidance problems on the 2021 Hyundai Palisade?
NHTSA has 26 complaints about the driver assistance of the 2021 Hyundai Palisade, 6% of the model year's 446 complaints. The component named most often is warnings (11 mentions).
Is there a recall for 2021 Hyundai Palisade collision avoidance problems?
No. NHTSA lists no driver assistance recall for the 2021 Hyundai Palisade, though it has 6 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2021 Hyundai Palisade collision avoidance problems start?
Half of the complaints with a recorded mileage happened before about 2,000 miles, and 100% before 25,000 miles.
Is it dangerous?
Owners linked 3 crashes, 0 fires and 6 injuries to driver assistance problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.