What 364 owners told NHTSA about the 2022 Hyundai Tucson Fuel Cell

The following is an account of what happened when the SUV's brakes failed, which caused serious damage to the 2022 Hyundai Tucson (the "SUV") and also damaged two other vehicles. On February 15 in the afternoon, The SUV was traveling approximately 20-30 mph and was rolling up to a red light. There were about 6 car lengths between the SUV and the next vehicle as driver started pressing the brakes. Driver noticed the SUV wasn't slowing down so Driver started pumping the brakes and still nothing. Driver even looked down to make sure he/she was pressing the right pedal and he/she was. The SUV was getting closer and closer to the vehicle in front. Driver kept trying the brakes, pumping, flooring, everything. The SUV would not slow or stop. Driver tried to avoid the car ahead and did all driver could think of to slow and not hit the car ahead but the SUV would not slow down. The collision warning came on as the SUV struck the right of car in front of it. The emergency braking did not come on. Further, the SUV still did not stop until the tire hit the concrete barrier in the road. The airbag did not deploy. In total three vehicles were damaged as the SUV hit one which pushed it into another at the light. Hyundai corporate consumer assistance was contacted and a case opened. The case manager did the initial reach out after the complaint but has failed to return any phone messages or emails about the case for close to a month.They were told where the vehicle was and consent signed so they could inspect and it remains available for them to do so. The dealership was contacted but the person spoken to said its a corporate issue. The SUV is at a body shop and will be sent to Hyundai for mechanical issues and we are hoping they will look at least then for cause. There were no issues before the accident. No previous brake issue. The SUV is badly damaged. It is available to inspect upon request. The accident could have caused driver or others serious harm.

NHTSA ODI 11512243

The contact owns a 2022 Hyundai Tucson. The contact stated while driving approximately 70 MPH down a mountain, the brake pedal was depressed, and the vehicle started vibrating abnormally. There were no warning lights illuminated. The contact took the vehicle to the dealer who diagnosed that the front brake rotors hot spots. The rotors were turned. The manufacturer was not made aware of the failure. The approximate failure mileage was 76,000.

NHTSA ODI 11507662

On Tues Feb 7, 2023, I was traveling at approx 6:50 pm on a suburban street at the posted 35 mph limit. My car started to lose speed, slowing to 27, then about 22-24 mph. I felt as though the engine was misfiring for an unknown reason. Since I was approaching an intersection and needed to make a left-hand turn, I started to depress the brake pedal. With no oncoming traffic, I slowed not quite to a stop, made the turn, but then had extreme difficulty getting the car to accelerate, again with the engine sputtering, chugging like a misfire, and shaking. My vehicle did not seem to go beyond 15 mph, and slowed again as I turned into my destination, about 2-3 blocks from the intersection. I parked and locked the car and was in a store for approximately 10 minutes. When returning to my vehicle, it would not start-the brake pedal could not be depressed at all, it appeared extremely hard. After 1-2 minutes of gently tapping the brake pedal, it loosened and I started the car. I put the car in reverse and it stopped in the middle of the parking lot with cars almost hitting me. I saw Engine Warning lights, Battery Warning lights, and a quick message across the screen but was unable to capture the meaning. After several more attempts, the engine started but was shaking violently, but I could not go beyond 3 mph. The shaking was so strong, items on the passenger seat shifted on the floor. I chose to remain in the parking lot and call Hyundai Bluelink. Since it was dark, I remained in the vehicle with the engine running, but excessive smoke billowed from the rear of the car. It was towed to Gerald Hyundai in North Aurora. After 3 days the dealer could not find any issue, however, I refused to take the car back, as I could recall it misfiring in previous weeks but unfortunately dismissed it. I requested a Technical Case File be opened at the Dealer. I still do not have my car after 1 week. This is a very serious issue and I am aware other owners have experienced it as well.

NHTSA ODI 11507213

The car has been erratic in its performance since purchase. The car has a continuous issue with the suspension, electronic system, and brakes. I have reached out to Hyundai manufacturer on numerous occasion regarding the car and no one is addressing my concerns. The car drives so erratic and unpredictable that I am fearful that someone will be injured or worst. Attached is a photo of the entire system going offline, which occurs all the time, and because the whole care is computerized this poses a safety risk for me and others on the road. When the car goes offline, I no longer have control of the vehicle and all mechanical systems are down. Please help me to get this issue resolved before someone gets hurt. This is the second submission in regard to this car. 5nmjfcae4nh015882

NHTSA ODI 11499261

Purchased vehicle new at dealership with less than 20 miles on it. No aftermarket parts, no accidents or issues. Normal daily conditions, and constant logging on fueleconomy.gov. 08/17/2022 at 8:15 am: Driving 45-55 mph on major freeway with a low/moderate traffic. Roughly 5 miles from home, good road conditions and good weather. Suddenly, Automatic Emergency Braking System engaged (and related cluster lights/alarms displayed on dash). There was NOT a vehicle in front of me, and nearest vehicle in front was roughly 150 ft. away. Emergency brakes engaged so forcefully that I was unable to keep my vehicle moving forward, and vehicle came to a complete stop in the left lane of major freeway. My vehicle instantly turned off (or "died") with the radio still playing, but nothing else on. Had to place the vehicle in park, push the start button, and place the vehicle in drive, in order to continue. Obviously very unexpected. Vehicle behind me had to slam on their brakes (tires squealed) and narrowly avoided hitting my vehicle by about 36-48 inches. I'm unsure how they managed to avoid not hitting me. Unfortunately, the vehicle behind that car could NOT avoid the maneuver, and hit the vehicle that was directly behind me. I do not know if the other vehicle had injured individuals, as I was trying to get out of the left lanes of the 5-lane freeway, coming from a complete stop. Essentially, my vehicle caused someone to hit the vehicle that was directly behind me. I placed my hazard lights on, immediately pushed BlueLink button, but after two (2) times of inability to hear their voices because of breakup, I pushed SOS. Ultimately drove directly to Steele South Loop Hyundai and informed them of incident. Per dealership, they were unable to duplicate the problem, and found no error codes. I am not afraid to drive my car, with only 5,500 miles on it. Requested for dealership to report to you, but do not believe they took me seriously, so I am doing this. MAJOR SAFETY HAZARD

NHTSA ODI 11481029

I was in a turning lane & a driver swerved in front of me. My car is equipped with auto start stop and it was on. I slammed on my brakes and the engine turned off. When I tried to start restart the car there was a fluttering/grinding noise. Turned off the key and restarted the car. Dangerous in the intersection with a stalled car. At the dealer now but not optimistic. Annoying to have to turn off feature each time.

NHTSA ODI 11454849