Started car and proceeded to drive to work. 1 mile from home, heard a "pop" noise and the car displayed "Check Electric Vehicle System" warning and went into a "turtle" mode that limited speed. Luckily I was on a side street and had not yet made the turn onto the main highway or it may have obstructed traffic or resulted in a crash. I was able to return home and have the car towed back to a Hyundai dealer for diagnosis and repair. The dealer identified the issue as the ICCU fuse and ICCU itself that needed replacing. All previous recalls and software updates were completed, including the latest ICCU recall (272?) which was completed on December 3. There have now been multiple software updates and recalls targeting this part, but it still resulted in the vehicle losing power and being inoperable.

- Milwaukee, WI, USA

Our 8-mo old 9800 mile Ioniq 5 failed to maintain its 12v battery while parked for a week. It was dead when we came back to it. Jump started successfully. I replaced the OEM battery with an AGM battery, which the car failed to maintain charge on after 2 weeks. At that time, while driving, the car displayed "Stop vehicle and check power supply" and "check vehicle electrical system." I had a battery monitor installed which showed the car only had 44% charge left in a new 12v battery. By the time we made it to the dealer 15 minutes away, the car was barely above 20% on its battery, and was about to stop on the road. The car has been diagnosed with an ICCU failure and replacement parts are 2+ months backordered. This car appears to brick itself without much warning to the driver -- and clearly Hyundai's software-only recalls are not fixing the root cause of this dangerous safety issue.

- Sunnyvale, CA, USA

Auto lost all power. No instruments visible. Propulsion system would not charge. Thankfully vehicle at a stop when occurred. Unable to drive. Car as dead as a home in a power outage. Everything dark. Nothing electrical worked. Had to use emergency manual key to enter vehicle. Tow truck driver said this was the 4th Hyundai Ioniq 5 he towed that week. All dead. Car at dealer awaiting diagnostics, which because of backlog, could take 3 or 4 weeks.

- Morganton, GA, USA

1. Uncertain which part failed. 2. safety was put at risk due to car not able to accelerate. Car would not go over 20 miles an hour on the interstate access road where traffic was going by at 50 -?"60 mph - four-way flashers were on and had to pull off at the first available turn but it was scary 3. Contacted local Hyundai; they are investigating a possible loaner, but haven-??t said what they will do. 4. No inspections yet. 5. No warning or unusual events prior to lack of power/lack of acceleration. 6. Internet search showed that this problem has occurred to others.

- San Antonio, TX, USA