2021 Hyundai Santa Fe

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.

Smart Cruise Control relies on the inconsistent and consequently unreliable performance of the of the front-mounted radar. Otherwise-reasonable operation of the Cruise Control would abruptly terminate 1/3 to 1/2 of the intended use-time, illuminating the master warning light (the amber triangle with internal ‘!’) that was accompanied by either a ‘1’ or ‘2’ encircled by red and may or may not have included the Collision-Avoidance warning light. Subsequent examination of the rectangular shield in the center of the grill very rarely revealed more than 2 bug remnants. When the Smart Cruise Control was in operation it would abruptly apply the brakes when approaching or passing a truck in the lane to taffiche right. There appeared to be no similar conditions to the size or shape of the truck or trailer when these events would occur. None of these events applied to congested tr conditions, just otherwise open road. The ’21 Hyundai Santa Fe does not appear to accommodate any mechanism to revert to conventional cruise control, omitting the influence of the erratic front radar system. Trips to two dealerships have yielded no redress to this malfunction.

This vehicle is the first Santa Fe that only comes with adaptive cruise control and there is no way to disable it and set regular cruise control. Here are just a few examples of the safety risk. We were on State Highway 29 which is a rural 4 lane highway. There were 4 cars near us. Our cruise was set for 70mph. A vehicle came in front of us to pass which it did. There was no issue. However, our vehicle saw this as a threat and our vehicle slowed from 70mph to 50mph until the other vehicle was out of the set car length distance. Meanwhile the other cars around us had no indication or warning why we would have slowed down this much and we were nearly rear ended. There was screeching of tires and brakes suddenly applied by the other vehicles. All for nothing. I am on the highway with the cruise set at 75mph when again vehicles will come in front of me and my vehicle slows from 75 mph to 54mph, causing the surrounding vehicles to not know what is going on and I hope they are paying attention because there is nothing really going on other than normal driving. It is terrifying to have your vehicle control itself and you don’t know when it will start to accelerate again so for the most part, I am shutting the cruise control off and on constantly. At our most recent Hyundai service appointment for this problem, we were told by Hyundai Care Manager that this is exactly how it’s designed and there is no problem. And we’ve been told just simply don’t use the cruise control at all. That is not a solution. We feel like all these “safety” features are creating a sense of driver coma on our roads. Instead of the left lane being used for faster cars as a passing lane, the adaptive cruises are creating a chain of vehicles that are well under the speed limit

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

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.