2025 Hyundai Santa Fe electrical system problems

“2025 Hyundai Santa Fe - The sound for the blinkers, rear-view camera alerts, and radio sounds has gone out 2 times, once in XXX and then on XXX. This is a safety issue. I have had issues with an electrical battery drain with the key fob antenna being one of issues draining the battery and replaced in XXX. After the sound went out on XXX, I did not drive the vehicle for 1 day, then went to get into the vehicle on Wednesday, XXX and the vehicle was dead. No lights were on, it would not unlock. I missed the scheduled service appointment I had on the XXX due to the dead battery. The car had sat unused for less than 24 hours. I had to call Hyundai roadside assistance for them to jump the car off and tow it to the dealership yesterday afternoon. The battery drain started happening at 700 miles on the car, where I jumped it off myself, and continued to happen every month or two. I kept jumping it off and taking it to the dealership to let them know what was going on. Sometimes, they would investigate it, and sometimes nothing would get done about it. I have had to jump this vehicle off myself at least 6 times since XXX. Yesterday, I just called roadside assistance.…”

“with not warming the vehicle would not start using the standard FOB. It would not be recognized. Fortunately, we had an alternative Digital Card (which is NOT standard equipment) that allowed us to start and drive the vehicle. Upon calling Hyundai support we were instructed to take the vehicle to the nearest Hyundai dealership for diagnosis. The diagnosis was a failed BDC (Body Domain Controller). This part took a week to arrive at the dealership and subsequent repairs were made. The dealership indicated that they had seen this problem before, but no service advisories from Hyundai were available for this issue. I have asked Hyundai for an explanation and nothing has been forthcoming. My primary issue with this problem is that if I had not acquired a digital card, at an additional cost of approximately $200, we would have been stranded, with no manner in which to start or drive the vehicle. There were no indications of a problem, no alerts in car, and no alerts via the My Hyundai web site via the internal diagnostics. The BDC just failed, with no explanation. Without any type of explanation or diagnostic information, who knows if or when this could occur again, and where.”

“ON 3 separate occasions the vehicle has suddenly quit going.twice going through an intersection after taking off. the third time going up hill near my house. the car would only go 10 mph. A message would come up on the dash that reads " transmission system error, Check transmission oil immediately. That was not the problem. The Hyundai dealership performed a recall update on the computer the first time.but that didn't solve the problem as a week later the same thing happened .Again the car was towed to the dealership. this time another transmission service was performed according to a tech line information. after retrieving my car from the dealership I drove it for less than a week and the same thing happened. The car was towed back to the dealership again.Now the dealership says they can't do any repairs as the computer will not store any malfunction codes so they will know what to repair. I have been in contact with Hyundai Motor America and a case file has been established. " 43176412 ". Hyundai will not accept any responsibility for placing a computer in a car that will not retain a MIL code. Hyundai now tells me they have done all they can and for me to…”

“Hyundai Sante Fe Hybrid 2025 has a bad factory seal on the high voltage harness - hybrid battery connector that causes water to intrude the connector under normal conditions which can short the battery and pose a major safety issue. Hyundai is refusing warranty coverage of my shorted hybrid battery on my brand new 2025 Hyundai Sante Fe Hybrid stating “Flood” with no evidence of flood damage. My car experienced multiple P engine hybrid system faults on XXX and would not drive. I had it towed the Van Hyundai Carrollton on that date. They did not look at the car for over a week and it sat on their lot the entire time. On XXX they finally inspected it and claimed the car had been “flooded” and shorted the hybrid battery. The only evidence they provided was moisture in the high voltage harness. There were no water/silt lines, any other damage to any other components, and no evidence of any water anywhere else on the vehicle. The video they showed of the undercarriage only showed normal splash marks from driving. The car was never flooded/submerged. Any water/moisture found in the harness would have been due to a faulty/defective factory seal that should be…”

“What component or system failed or malfunctioned, and is it available for inspection upon request? The vehicle suffers from an intermittent, total engine stalling and propulsion failure. Without warning, the engine completely shuts down while driving and automatically drops the vehicle into "Accessory (ACC) Mode". The vehicle is fully intact, operational when it restarts, and is available for immediate inspection upon request How was your safety or the safety of others put at risk? This issue has occurred five total times in live traffic, severely risking the safety of the vehicle's occupants and surrounding drivers. The most recent and dangerous incident occurred on the freeway in heavy, stop-and-go traffic. A sudden, complete loss of power on a high-speed freeway leaves the vehicle entirely vulnerable to rear-end collisions, as it leaves no room or momentum to safely coast to the shoulder. Has the problem been reproduced or confirmed by a dealer or independent service center? No. The vehicle has been brought to an authorized Hyundai dealership five separate times specifically to diagnose this exact stalling issue. Because the failure is intermittent,…”

“While driving on the on ramp to [XXX] the car completely stopped and all systems shut off. There were two dash lights that flashed quickly with one being the check engine light but I did not see the other long enough to identify it. The dealership could not reproduce the issue but has the car now and is doing a more thorough evaluation. What component or system failed or malfunctioned, and is it available for inspection upon request? The engine stopped. Yes it is available How was your safety or the safety of others put at risk? Extremely dangerous as it came to a stop in the middle of the road. It was late at night so at that moment no one was behind me. Has the problem been reproduced or confirmed by a dealer or independent service center? no Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? no Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? no, the warning lights flashed on as the car died but disappeared once off.”