Electrical System Problems of Hyundai Tucson - part 2

Subject: ongoing electrical and safety issues with 2025 Hyundai Tucson limited complaint description: I am reporting a recurring and serious safety issue with my 2025 Hyundai Tucson limited. I am the original owner and purchased the vehicle brand new, directly off the truck. It has now been to the dealership four separate times for the same persistent “check user authentication” electrical issue. Most recently, the driver display screen went completely blank while driving and flashed a green “no signal” warning. This made it impossible to see speed, warning indicators, fuel level, or other critical driving information. Losing all visibility of this data while in motion is extremely dangerous and creates a serious safety risk. The dealership first said it was caused by loose coax cables from the factory, but the problem continues. I also experienced a sudden, complete electrical failure while driving. The instrument cluster and infotainment shut off, speakers went dead, and all charging ports lost power. The head-up display (hud) also failed during this same event. Restarting the car temporarily restored function, but the failure happened randomly and without explanation. The air conditioning system now loses power and restarts while driving. The dealership has had the vehicle for over a month with no resolution. Hyundai corporate is involved with multiple case numbers, but no permanent fix has been found. The most alarming event was when every major dash warning light came on at once: abs, power steering, traction control, stability control, afs, epb, and battery. These lights stayed on even after shutting off the vehicle and fully drained the battery. These repeated failures pose a serious threat to driver and passenger safety. I request that NHTSA investigate these issues, as they may affect more 2025 Tucson models.

Safety issue having to replace multiple horns on the vehicle. Known issue from Hyundai America. Would like an investigation, maybe a recall.

See all problems of the 2022 Hyundai Tucson 🔎.

1 forward collision unexpectedly slammed on the brakes when I was trying to go forward to make a left turn. There was no one in front of me nor each side of me. I had 2x4’s in my car that were thrusted forward damaging my dashboard and display. I was told to take it to the dealership on Monday 2 I was fine just hooked up, but the driver was pissed off at me thinking I was stopping short on him 3 randomly the rear sensor would go off telling me they are too close when I’m at a complete stop. It has randomly stopped short on me but I thought it might have just been an over sensitive sensor. I have previously owned an ioniq 5 and the sensor would never stop going off even if I was 2 car lengths away. 4 the car is going back to the dealership on Monday so it has not been expected yet 5 exactly 6 days after purchasing the car the airbag indicator showed up on my dashboard while I was driving. I was used to the ioniq 5 sensors always going on when I was stopped waiting for a green light that I just thought it was the same way. It had abruptly stopped on me three other times between the 6th and today the 21st. I have only had it for 3 weeks. I have never gotten any warnings before the car just slams the breaks on. After looking online about this issue I decided to make a report before I take it to the dealership so you have it on file. I am very disappointed with this vehicle and was so excited when I bought it. I have been a loyal customer of Hyundai since 2017 when I bought my first ioniq and I have purchased 6 other cars for my family members since then. I still purchased the Tucson after having to take a 15,000 loss because the ioniq 5 never held its value. Now I’m wondering if I should switch manufacturers.

My 2023 Hyundai Tucson has had the horn replaced twice. The technician indicated this is a common problem due to the location of the horn its susceptible to water damage rendering it useless. The horn is something rarely used and we were not aware it did not work until we tried to use it to alert a car entering our lane of traffic!.

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I purchased a new 2025 Tucson limited hybrid model. I owned it for five days when the dash display went blank, leaving me without any speedometer, warning indicators, or safety features, such as lane departure warnings. There is a manufacturers bulletin on this defect. Took it back to the dealer, and they tried to sort it out. They kept the car for a week and indicated that it was fixed. I picked up the car, and in 2 blocks it did the same thing. Car is now back at the dealer. I believe this is a significant safety concern, as all safety features should be visible, especially the speedometer.

Battery management system failed safety-could not drive on interstate. Very unsafe. Dealer inspected problem afterwards. Warning lights appeared at time of problem. No warnings before. No signs of problem before it happened. Synopsis: after driving through a torrential thunderstorm on the interstate (06-13-25) and as we were getting ready to slow down for our exit on the interstate, we hit the brakes and our SUV gave us a warning. The warning said, "battery management system discharge". The SUV is a hybrid. At this point the SUV locked into e v mode. Our SUV would only go 10 mph which was very dangerous. It should be able to go up to 35 mph in e v mode and then past that, switch into gas mode. As stated, we could only go about 10 mph. We made it to our exit and found a spot to pull off the ramp. We let the SUV sit for a few moments and turned it off. We let it sit for a minute and then turned the car back on. The SUV when we turned it back on gave us a check engine light and still would not go over 10 mph. Luckily we were stopping for dinner. We were able to proceed to our destination. After dinner around an hour or so, when turned the vehicle back on, the SUV still gave us a check engine light. But was able to drive normally and switch between e v and gas modes. We made it home safely at the end of the weekend on 06-15-25. On 6-16-25 we took the SUV to be looked at by the dealer we purchased it from. Our phone app showed code dtc p0aa600. We gave the code to the staff. The staff inspected the SUV. The report stated, "customer states stopped driving and there code p0aa600 battery warning light npf could not duplicate problem. Tech scanned for codes code p0aa600 was found as a history code. Tech checked live data and everything came back within spec. Followed the flow chart procedure for the code. Check for bms isolation faults none found. Check 12volt battery. Battery is good". We drove it home and filed this report.

The contact owns a 2024 Hyundai Tucson. The contact stated that while the vehicle was parked, while attempting to enter the vehicle, the key fob failed to function as intended. The contact was unable to unlock the doors to the vehicle. The contact noticed that the battery was completely drained. The vehicle was taken to the dealer; however, the failure was not duplicated. The contact was informed that the vehicle needed to be started daily to prevent the battery from draining. The contact stated that the failure was persistent. The contact stated that because of the persistent failure, the contact was afraid to drive the vehicle. The vehicle was taken back to the dealer; however, the failure was not duplicated. The manufacturer was made aware of the failure. The failure mileage was approximately 900.

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Horn does not work. On going issue with this model per Hyundai Tucson forum.

Our Tucson was stolen in charlotte, nc on [xxx]. The pax rear window was broken and the thieves broke open the steering column to start the car. It appears they used the well-known "tik-tok" method. I have record that our Tucson had the "software update" installed, at a local dealership, a year ago. This update (which should've been a recall) was supposed to address this issue. Despite this update, the car was stolen in less than 2 minutes (I have ring camera pictures with timestamps). I have doubts now that the dealership actually did the update. Part of the update includes a specific window sticker that is to be applied to the driver's door window. That decal is missing. There is no evidence that it was ever there (I have pictures). The car was recovered but cannot be driven. It must be towed due to the damage. Another concern is the engine and drive train. Criminals were out joy riding in our stolen car on an almost full tank of gas. Because the car cannot be driven, I don't know if there is any damage to any part(s) of the drive train. We are now waiting for our insurance company to arrange to have the car repaired. I am very concerned now about the long term viability and reliability of this car. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2019 Hyundai Tucson 🔎.

Car cuts off when driving the speed drops down automatically stops the dash lights go out and can’t start it right away.

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The heads up display and dashboard turns off and on, sometimes going black for 20 min at a time. This results in not having a speedometer or gas gauge, which makes it an unsafe vehicle to drive. Dealer has not been able to fix, despite multiple repair attempts. There are many Hyundai Tucson hybrid limited owners reporting identical issues online. Identification of affected vehicles, determination of an effective repair, and recalls are needed to ensure safety.

While driving, my entire dash will go black. At times, all warning lights will also light up. There is no way to know how fast I am going since the display shuts down. Heads up display also goes out with warnings as well. With all warning lights coming on, there is no way to know if there is truly an issue with the car. The car was taken to the dealership and the cluster was replaced. This did not fix the problem. The car is now back at a dealership with no answers. I do have a case opened with Hyundai as well. Case # 41048985. I am a part of a facebook group were an additional 19 people have also said they have experienced the same issues. There seems to be no real concern from Hyundai. Safety risk - speed visibility, warning lights, overall safe operation problem as been confirmed by the dealership no issues with the vehicle prior to this.

While driving, my entire dashboard lit up with every warning sound and symbol for the car. It would cycle through collision, airbags, braking, all of it. Luckily I was able to drive to a safe place. I let the car sit overnight and the alarms stopped. Took it to service and they could not recreate it and no codes showed up. Second time it happened, the warning sounds and lights didn’t stop. The car would jerk when I tried to put it in drive, so I had it towed to dealership. They have video and photos of it. After 2 weeks, they said it was fixed-a pin in a connector was bent. Had car for 3 days and it happened again. Had it towed again. They have had their ‘senior’ techs looking at it, and none can figure it out. There are reddit posts with this same issue, as well as Hyundai group sites.

My catalytic converter caught on fire a couple months back then I hit a code for the knock sensor replaced it and it started to act up again I can’t go over 49 burning oil took it to Hyundai now they are saying my engine is going out and I’m still panting carmart got the car.

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The contact owns a 2023 Hyundai Tucson. The contact stated while driving approximately 45 mph, the accelerator pedal was depressed while merging onto a highway, but the vehicle lost forward momentum. The contact stated that the message "limited to 20 mph" was displayed on the instrument cluster. The contact depressed the accelerator pedal, and the vehicle failed to respond as needed. The contact stated that the engine was not revving. The contact pulled off the highway and into a parking lot. The contact turned the vehicle off and on, and normal driving was resumed. The contact stated that the failure was intermittent and was occurring while accelerating. Additionally, the contact stated that upon starting the vehicle in the morning, the vehicle would jump forward while still in park (p). Additionally, the contact stated that the horn had stopped functioning after the last loss of forward momentum but had returned to normal function a few days later. The vehicle was taken to a local dealer, however, the dealer was unable to duplicate the failure. The vehicle was not diagnosed or repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 26,500.

After an impact with a large buck (deer) on a main highway while traveling 70 miles per hour, the airbags failed to deploy.

See all problems of the 2018 Hyundai Tucson 🔎.

Was driving at night and my lights went off and the radio turned off and right back on a second later. It’s like the system rebooted. Drove fine.

The driver attention warning is a dangerous feature that can't be turned off. It is constantly going off requiring that I take my eyes off the road to see why it chimed. I am a disabled veteran with an eye condition that requires me to wear very dark glasses in bright sunlight. The car is not drivable with my glasses on as the camera can't see my eyes. I was almost involved in a serious accident on i459. As I drove between an 18 wheeler and another SUV a red light on the dash and a message flashed that stated "regain control of the car". The system slammed on the brakes which caused the car behind me to almost hit me at 70mph. This occurred in heavy traffic at approximately 8:30 am. I almost lost control of my SUV.

The contact owns a 2024 Hyundai Tucson. The contact stated while driving approximately 60 mph, the vehicle stalled. The contact stated that before the vehicle stalled, there were several unknown warning lights illuminated before the instrument cluster went black. The contact pulled over and shifted to park(p) and was able to restart the vehicle after several attempts. The contact stated that the failure had occurred intermittently and at various speeds. The vehicle also occurred while stopped at a traffic signal. The contact had taken the vehicle to a local dealer who was unable to duplicate the failure. The vehicle was not repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 18,000.

What component or system failed or malfunctioned, and is it available for inspection upon request? > while driving, the following systems fail and become inoperable sporadically: blind-spot safety system, tire pressure monitoring system, Smart cruise control system, lane following assist system, speed limit warning system, shifter system malfunction, infotainment system, hvac controls and turn signals. How was your safety or the safety of others put at risk? > I lose access to all safety systems and am unable to see anything on my dashboard while every single light flashes on the dash. Being unable to utilize my turn signals is dangerous because I must restart the vehicle for the issue to be resolved. Has the problem been reproduced or confirmed by a dealer or independent service center? > the problems were confirmed - but not reproduced by the Hyundai certified service center. They stated that they can see logs of the issues and were unable to diagnose the specific failures without the warning lights being actively present. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? > yes. It was sold to me as a certified pre-owned vehicle directly from a Hyundai dealership. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? > the warnings and failures appeared at 64,752 miles, which is less than 5,000 miles after the warranty coverage ended. I purchased the vehicle with 64,300 miles. The issues began less than 500 miles after purchase.

Approximately 2-3 months ago, the horn had failed. This was reported to the dealer and covered under warranty. During the service the dealer advised that this issue was due to a faulty electrical contact and was a “known issue with the supplier of the horn”. Because of this, Hyundai extended the warranty period on the horn. Now, the horn had failed a second time and was discovered during a safety hazard in which I needed to alert another driver. This had the potential to cause serious injury but was avoided.

1. Sometimes vehicle does not start. Only starts if battery reset button pushed. 2. Sometimes vehicle while moving has delayed braking after juddering. Only stops when car stopped and restarted. 3. Sometimes vehicle while moving suddenly revs, rpms spike until car stopped and restarted. Engine revs but does not shoot forward. 4. Spookiest of all, while moving car suddenly stops accelerating. Pedal on the floor and it is coasting to a stop. When car stopped, and turned off, then it will work. Had we been on the interstate we would have died, these incidents were sporadic and occurred on and off during the month of April and may. Each of the above occurred numerous times to different drivers. Service at two locations were unable to id. We sold the moving death trap to one of the Hyundai dealers who could find no mechanical problems with the vehicle. The vehicle was terrifying to drive. There are other reports on this vehicle of these issues . . . Which appear to be electronic. Hyundai has good engineers. They know what is causing this and simply do not want to replace a very expensive but obviously failing electronic control module.

I leased a brand new 2025 Hyundai Tucson on March 15, 2025, with fewer than 10 miles on the odometer. Shortly after driving an additional 10 miles, the vehicle’s screen malfunctioned, displaying burn-in and becoming non-functional. This issue significantly affects safety, as it renders the backup camera unusable during operation. The vehicle was first brought in for service on March 17, 2025, but the issue was not resolved. Subsequent service attempts were made on March 20, April 9, and most recently on April 11, 2025. As of today, the problem remains unresolved. The vehicle has been in the service center for approximately 15 days since the date of purchase. In addition to the defective screen, the vehicle failed to start on one occasion, leaving me stranded alone in a parking lot, stuck in accessory mode with the brake locked. The car has also exhibited alignment issues, consistently pulling to the left while driving, which has required two alignments since the purchase date.

Power windows will go down by driver buttons but driver buttons will not work to make windows go back up. Engine is stalling, can smell exhaust, manifold is said to be needed to be replaced. Burns oil badly.

The car turned off while I was driving. Everything went black. I was able to coast to the side of the road.

Had the oil changed at the 36k mark. Since then some weird electrical issues are happening. Bluetooth nor android auto will play a song more than 2 minutes before starting again. The screen is harder to "touch" for anything. If I turn my blinker on or use any control on steering wheel as well as roll down the window, the electrical will "flash" and again song starts all over. My husband went out to garage last night and opened the garage door to go to his truck and did not have the key to my Tucson on him. He opened the garage door and the hatch to the Hyundai started opening as well. Taking into the dealer on Tuesday, they state no recalls on any electrical issues, though I see it throughout multiple platforms online.

The ac system on my vehicle stopped working with less than 55,000 miles on it. When replacing the compressor, condenser, all ac switches, and lines (the entire ac system besides the ecm), the ac is still not working. The compressor is not kicking on. I have an ecm on order, but myself, and all mechanics (including Hyundai certified mechanics) are all unsure why this would have happened on such a low mileage vehicle. I am extremely disappointed and frustrated with the experience and not having ac after spending thousands of dollars and time getting it fixed. Please advise ASAP. Attached is the original invoice stating that all that needed to be replaced was the condenser/compressor. I have more files from all of the other replacements provided if needed.

See all problems of the 2021 Hyundai Tucson 🔎.

Vehicle has 36,300 miles. Engine stalled twice when shifting into reverse, mid displayed "bcw on, check system. " continued driving home, vehicle experiences power loss (rpms drop to ~500) and electrical system sputters and sparking noises can be heard in the cabin momentarily when turning left or steering left for curves at speeds over ~20mph. Checked bcw sensor location in rear bumper for obstructions - vehicle is clean.

1. After driving the car and turning it off, I get a loud bang coming from a gas tank. 2. Sometimes when making a hard right or left turn steering wheel vibrates, and the warning light for all wheel drive system comes on. When I turn the car off and restart it, it goes away. 3. After software installs due to recalls, when I accelerate my radio occasionally shuts off on its own, and then we’ll come back on on its own. 4. After turning the car off when I restart it occasionally the clock in calendar revert to 00:00 for the time and the date resets to 1/1/20.

The driver attention warning continues to go off shutting the cruise control off. This happens continuously and is a safety issue when driving in traffic and the vehicle suddenly decelerates. This causes traffic behind you to almost reared you because the vehicle decelerates so quickly. Hyundai suggests to move seat, not to wear glasses and other options that in themselves are additional safety concerns as seat positioning and glasses are needed for driving. So far my car has had the sensor located on top of the steering column shimmed up, and wiring harness replaced all to no satisfactory conclusion. Hyundai is aware of the issue, but has no solution to the issue. I’ve been in a loaner for almost 2 months while they string me along looking for a solution. Something needs to be done to fix this safety concern.

Hyundai has a service bulletin for their 12v battery but isn’t notifying owners. Today my vehicle stopped working and lost all acceleration on a busy 3 lane street that is 55mph. I was able to limp it to a left turn lane where I had to research the issue and found many others had instances like mine. The battery stops working and subsequently stops the vehicle from accelerating and tells you to ‘stop safely’ with no warning or indication that you’re about to stop moving on a road.

The front passenger window regulator failed in Jan 2025. Before the complete fail, the power window was becoming sluggish when lowered/raised. I just paid $1,000 to have the dealer repair. I have seen dozens of online items regarding the identical issue. I consider it a safety issue because of easy entry to the vehicle interior and contents, including inclement weather that can damage interior electrical components.

The front passenger and rear window regulators failed within 1 month of each other without any warning or symptoms. After inspection, it was identified that the plastic window regulator was completely shattered within the door. There was no damage to my vehicle that could have caused this. With the window regulator not working, my windows were not able to be opened or closed. The front window regulator actually got stuck in a down position. After some additional research online, I found several others who have had the same issues with the window regulators on their 2016 Hyundai Tucsons. This is a safety hazard because if I were ever be in an accident or a place where I need to exit through my windows and they are unable to go up and down for a safe exit. I have spent over $1600 in repairs to fix an issue that is clearly a defective part in the windows.

Automatic headlight system causes the vehicle headlights to turn on and off during daylight conditions. The lcd display in the dashboard also dims to the point that the information presented cannot be read. This typically happens on bright, sunny days with a clear sky. Vehicle has been to the dealership in excess of seven times where they've made multiple attempts to repair it. The light sensor behind the windshield has been replaced. The body control module has been replaced. The technician also tried to make modifications to the light sensor, but the problem persists. There are a number of other instances of this exact issue involving Hyundai Tucsons, santa fe. And santa cruz vehicles shown on the NHTSA site, and also when searching other sites online. Dealer technician has repeatedly documented that the problem exists. Dealer tech reported that the tech at the Hyundai helpline suggested that the auto headlight feature not be used as a resolution. While not a solution under any conditions, even with auto headlight feature turned to off, the dashboard displays continue to dim during the day. The flashing headlights represent a serious safety issue as when following another vehicle, that driver may misinterpret the flashing headlight problem as an aggressive gesture and trigger a road rage type response. The call taker I spoke with at Hyundai when I opened a customer service case said that he personally had that very issue with another driver due to flashing headlights.

Rear passenger door won’t open from inside or outside. Safety concern.