2020 Hyundai Tucson Electrical System Problems

The contact owns a 2020 Hyundai Tucson. The contact stated that upon starting the vehicle, the Brake Auto Hold was engaged unintendedly and failed to disengage upon pressing the button, which required the contact to turn off, restart, and drive the vehicle for some time for the Brake Auto Hold to disengage. The contact stated that the failure had been recurring. The contact stated that the infotainment system was inoperable. Additionally, the passenger's side rear seat belt failed to buckle as intended, and the passenger's side rear door handle fractured while the contact was opening the door. The dealer and the manufacturer were not notified of the failure. The vehicle was not diagnosed or repaired. The failure mileage was approximately 102,000.

I have experienced 4 repeated issues within 4 months with my vehicle. Starting in September 2025 and the 4th and current issue today 1/12/26. Driving when all of a sudden all of my brake components lamps come on dash oard, forward collision alert, and check engine, my vehicle struggles to accelerate accurately. Blue Link diagnostic throws various codes such as ECM, Transmission Control System, even "multiple possible issues". Each time my vehicle has been at Hyundai dealership for repair. Each time they repair something different 1st- replace ABS module and hydraulic brake, 2nd - happened out of state at my mother funeral and replaced my ECM, 3rd couldn't figure it out and guessed it was my Forward collision camera and replaced it, 4th - is today and awaiting dealership diagnosis. This issue has left me stranded several times local and long distance, occured in middle of driving including on highway, and overall uncertain of the safety and reliability of the vehicle as each time it has been the same type of issue. I have been in communication with Hyundai Corporate since October and they stated that even tho I only have 24k miles on the vehicle that it is outside the state of IN lemon laws for a buyback. If I hadn't purchased an extended warranty I would be in even more debt or unable to put it in the shop even tho I don't feel like this should be my burden when I have kept this vehicle in great shape, low mileage, frequent oil changes, etc . however the safety of my vehicles goes unresolved. At this point I am uncertain that Hyundai is properly diagnosing my vehicle and not certain how these issues are impacting other components of my vehicle such as brakes, transmission, engine, sensors. I am the only owner of this vehicle bought brand new. I have checked repeatedly for any recalls that I have not addressed and at this time none are pending. I fear that this vehicle will continue to have more safety issues.

The contact owns a 2020 Hyundai Tucson. The contact stated that the vehicle unintendedly shut off while driving. The vehicle was restarted. There were no warning lights illuminated. The local dealer was contacted and scheduled an appointment. The vehicle was not yet diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 70,000.

Had for a year. 6 months ago, started sputtering, surging, slowing and dying on a regular basis. Have had it shop at Chapman used in Tucson, AZ and Lawley Hyundai in Sierra Vista Arizona 3 times. Chaan couldn't repair, so we went to Lawley. The mechanism there keep saying they cannot reproduce! The engine malfunctions 3-4 time during any drive we do. Has been going on for 6 months.

The vehicle is a 2020 Hyundai Tucson with AWD. Current mileage of the vehicle is 58,309. In the last 10K miles, there have had 4 separate instances of a sustained flashing check engine light that has put the car into limp mode. Since the first instance, a knock sensor, catalytic converter, and spark plug coil, among other things, have been replaced. However, the issues persist and have yet to be resolved. The engine continues to misfire, resulting in dangerous driving situations. Most recently (XXX) the car went into limp mode on an interstate highway where the vehicle was unable to accelerate and could not exceed 2000 RPMs. The code scanner read P1326 - Glow Relay Short Circuit. This was just a week after the vehicle was towed to McGovern Hyundai in Brockton, due to the car being in limp mode (XXX) and the vehicle was given a clean bill of health. I was told that there was no cause for concern and the code was cleared. I’m extremely concerned about this issue with the vehicle and don’t feel that it is safe to drive, especially when it loses power on the highway. The vehicle is insured, but has not been inspected by an insurer. Nor has the vehicle been inspected by police. The car has been inspected by the dealership, but that have not produced any findings. The car is certainly available for inspection upon request. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA should have a non-official recall warning for Hyundai vehicles that have this software based Safety Defect, which is some models don't have a Passive Engine Immobilizer, and the vehicles can be easily stolen by starting the engine with a USB cord. Thankfully Hyundai(recall) offered a free Anti Theft Software Update, and a steering wheel lock. I checked my VIN number with the Hyundai Dealership in Oregon, and they said my car already received the Anti Theft Software Update. The only reason I knew my 2020 Tucson had this issue, is because State Farm cancelled my insurance a month after I started paying for it. State Farm and Progressive currently deny new policies for vehicles without a Passive Engine Immobilizer. Also State Farm still denied my insurance after I got the software update. Affected Hyundai models from 2011 to 2021 that have standard “turn-key-to-start” ignition systems/without a Passive Engine Immobilizer, are the Accent, Elantra, Santa Fe, Sonata, Tucson, Genesis Coupe, Palisade, Kona, Venue.

Warning lights for Lane keeping, Blind Spot, ABS, Autohold, Foward collision systems came on and will not reset. Reports of this all over hyundai forums and owner fan pages (Facebook, etc). It can fool the driver into believing the car is about to be in an accident prompting panic response in drivers.

My vehicle was stolen due to not having an ignition immobilizer. There were no warning lights. Yes its a known issue

When parked and car is turned off , if i don’t get out right away (key in ignition still or not) a “battery discharge warning” shows up on my display.

While driving one evening, it was brought to my attention that my passenger brake light was remaining on, when I was not braking. A week later, both sides are on. This happens only if my headlights are on - automatically or if I manually turn my headlights on. The back center light will only come on when I high the brake pedals. Again, back brake lights on driver and passenger side remain on regardless of brake pedal is engaged.

In September 2021 I bought the reference unit and on 4 different occasions I could not use it because it had no power. I took it to the dealer and they didn't find any problem, I used it again and again it ran out of power. It has currently been at the dealer for 5 weeks and they have not found the problem. I had a conversation with the previous owner and she told me that she had returned the unit to the dealer for the same situation. So far the dealer has not received an answer as to what is wrong with the unit. Nor have they provided me with a vehicle. This situation has affected my family since daily we are complicated about how to get to our jobs and schools. The dealer is Hyundai from Cupey, Puerto Rico PR-8838, San Juan, 00926 On April 16, 2022 dealer told us that they had solved the problem after being at the dealer for 7 weeks, dealer concluded that the car problem was the alternator. After using it for 2 weeks again on May 9, the car did not start and again were left without a means of transportation Consumer called a tow truck which took the bus to the dealer. THE CONSUMER STATED THE DRIVER'S SIDE GLASS WAS INOPERABLE. THE TAILGATE COULD ONLY BE OPENED MANUALLY, IT WOULD NOT RESPOND TO THE AUTOMATIC BUTTON.

PER THE NHTSA RECALL 20V-543, THE TUCSON HAS A RECALL FOR POSSIBLE BRAKE FIRES SINCE SEPT 2020. AS OF MARCH 2021 NO DEALER IN THE AREA YET HAS PARTS TO PERFORM THE RECALL SERVICE. HYUNDAI IS TAKING AN EXCESSIVE AMOUNT OF TIME TO REMEDY THE FIRE HAZARD.

RECALL #195 FIRE HAZARD DEALER SAID TO CALL BACK IN 3 WKS. TO SEE IF PARTS ARE AVAILABLE. (PARK AWAY FROM HOUSE. CAN CATCH FIRE. IN THAT CASE ITS NOT SAFE TO DRIVE. (BRAND NEW NOT AS IS.} SHOULD BE ELIGIBLE FOR LONER CAR .AND COMPENSATED FOR TIME I CANT USE CAR.

MY 2020 HYUNDAI TUCSON WAS PURCHASED NEW THIS YEAR FROM WEST HERR HYUNDAI I'M WILLIAMSVILLE NY. I WAS NOTIFIED OF A VEHICLE SAFETY RECALL RELATED TO ABS ISSUES IN SEPTEMBER 2020. I HAVE CONTACTED THE DEALER EVERY WEEK SENSE THEN, AND THEY CLAIM THEY ARE UNABLE TO COMPETE THE RECALL DUE TO A LACK OF PARTS. I BELIEVE THE DEALER IS NEGLIGENT IN ADDRESSING THIS ISSUE AND I WOULD APPRECIATE HELP GETTING THIS SAFETY ISSUE REMEDIED.

IAM WAITING FOR DEALERS TO TAKE CARE ABOUT A "RECALL" FOR TUCSON MODEL YEARS 2019,2020 AND 2021FROM THE MONTH OF SEPTEMBER 2020 . IS SUPPOSE MY TUCSON2020 COULD BE INFIRE BECAUSE OF IT,BUT I DON'T SEE DEALERS ARE INTERESTED FIXING THE PROBLEM NOW I AM WAITING FOR KENDALL DEALER IN MIAMI BECAUSE DEFINITTLY HOMESTEAD DEALER DO NOT WANT TO DO IT.