Hyundai Ioniq 5

"12v battery has failed several times requiring jumpstarting. Currently at dealership for 4th time to diagnose why the 12v battery keeps discharging. Battery replaced on previous visit."

"Four times since May 2024 the 12 volt battery died. In May 2025 the battery was replaced and about 6 weeks later the 12 volt battery died once again Brought it back a fourth time and left it with the dealer for 15 days and was told they were unable to find anything wrong."

""12v battery failure, car died and had to be towed to dealer. ICCU fuse failure. Still awaiting final repairs to be completed.""

"12v battery has died 5 times and had to be replaced twice. Apparently there were problems with the system that is supposed to charge it. In two instances the battery would no longer hold a charge. All repairs were under warranty but required waiting for a jump and then time at the dealership."

""It died at about 13,000 miles and had to be replaced. (It was NOT drained by user error, such as leaving lights on).""

"Part of the on going ICCU problem with all Hyundai electric vehicles. Don't feel Hyundai is handling the problem correctly."

"The 12v Battery died without warning. due to a fuse and ICCU. took a month to get replacement parts."

"We have heard from other Ionic owners that sometimes there are problems when the 12v battery doesn't charge enough and there are systems in the car that then won't work. Perhaps that was the problem when our car lost acceleration multiple times."

"Passenger door lock/unlock touch sensor did not work from day one. It took dealership six attempts to determine it was a faulty wiring harness."

"rear defroster not strong enough to clear the frost"

""There is a rattle from the rear trunk lid when going over bumbs. This seems to be a known problem. The dealer said it had been fixed when the car was serviced at its one year anniversary, but it persists. I have scheduled another appointment to fix the problem.""

"After about 5000 miles the trunk started to rattle. Still not fixed, but have not taken to dealer yet. A real shame because the car was completely quiet before this started."

""Weve not had the car serviced, but on rough roads there seems to be a loud rattle coming from the luggage area, and well ask them about it when we go in for the 8000 mile checkup in a couple of weeks.""

"Trunk/liftgate noise when driving. Known problem. Recall helped."

"Rear hatch would rattle most of the time even over small bumps. Dealer fixed it. Much better but still rattles over larger irregular road surfaces"

""Creak in tailgate, remedied by dealer after 2 trips. Hyundai has a service bulletin for this item.""

"Passenger front door rattles and again no idea how to fix. Like they dont really care"

"Took car to dealer on 2/5/2024 due to charging warning light. Battery charging malfunction. Still do not have use of the car three and a half months later due to Hyundais inability to replace battery. Hyundai has offered to buy back vehicle under NC s Lemon Law"

"The car battery still had about 100 miles left on its charge. The car suddenly slowed to 15 mpr. while on city streets. Then after about a minute, the car resumed normal driving. This happened 4 times while driving home--about 15 miles. It scared us and infuriated drivers behind us. The dealer was closed at the time. We charged the car and then called the dealer the next time they opened. We took the car in but they could not replicate the problem. We were told to immediately bring the car in if it happened again. It has not happened again. Thank good, what if it happens on the freeway?!"

"ICCU failed and needed to be replaced."

"The car severely lost electrical power to the motor such that it could at most travel at 20 mph. Parts were placed in the electrical system to correct the issue."