2024 Hyundai Ioniq 5 transmission & drivetrain problems

Related recalls

No recalls on file.

What owners say

1. Filed Aug 12, 2026CATransmission & Drivetrain

   Was driving to vegas, it was 103-107 degrees After fast DC charging drivetrain had issues that when pressing acceleration the car would have almost a loss in power that caused a stuttering movement. If forcefully driven, the error message drivetrain electrical system would pop up. Issue can be resolved but only after letting the car stay in park for 10-15 minutes after finished charging. Issue was repeatable but only if weather was hot enough. This shouldn't happen or at…

   NHTSA complaint #11756391 · source
2. Filed Apr 22, 2026CAElectrical SystemFuel, Hybrid & EV PropulsionTransmission & Drivetrain

   As I began a drive cycle, I heard a pop sound and received the “check electric vehicle system” warning associated with ICCU failure. With ICCU failure, if I had continued to drive the 12V battery would have run to zero and the car would have died completely. Vehicle goes to dealer tomorrow for confirmation.

   NHTSA complaint #11733152 · source
3. Filed Mar 20, 2026MDElectrical SystemTransmission & Drivetrain

   Received multiple "Check Vehicle Electric Systems" on a drive which went away and then got into the car, turned it on, shifted into drive, and heard a pop from bellow before moving at all and the car went into Turtle Mode and blasted warnings. The car completely died with zero power leaving it stranded in sub freezing temperatures and unable to lock the car or open the lift gate to access the trunk area. Eventually it was towed to the dealership and was diagnosed to have a…

   NHTSA complaint #11725845 · source
4. Filed Mar 18, 2026VAElectrical SystemEngineTransmission & Drivetrain

   While driving I received the infamous "Stop vehicle and check power supply" warning, and it was then inoperable, needed a tow to the dealer for ICCU replacement. I can't believe you terminated your initial investigation into this in 2023 because they did a recall (which my car received). That recall did not fix the issue. It is March 2026 and Ioniq 5 and other models with the same electric system are dying on the road at the same rate as before. There is a large percentage…

   NHTSA complaint #11725342 · source
5. Filed Mar 17, 2026MEEngineFuel, Hybrid & EV PropulsionTransmission & Drivetrain

   I was merging onto the highway. I got a warning that I needed to check my electrical system. I was able to back down the highway ramp and park on a side street. Within 20 minutes the car was fully dead and AAA needed to tow it to the dealer. The dealer confirmed that the ICCU needs a replacement. My family is lucky this happened in a place we could safely get to a side street. Had it happened 5 minutes later we would have been stranded on the highway with 2 small children.

   NHTSA complaint #11724910 · source
6. Filed Mar 4, 2026ILTransmission & Drivetrain

   According to Hyundai, all active recall campaigns have been addressed on this vehicle (NHTSA site says it wasn't, Hyundai claims it was on 9/22/2025). Last night (3/3/2026) while driving on an unlit, two-lane country road about 20 minutes from my house, I heard and felt a bang noise from underneath the rear cabin of the car accompanied by a message stating "Stop vehicle and check power supply" on the dash. The car immediately went into a limp mode, reducing speed to ~40mph.…

   NHTSA complaint #11722069 · source
7. Filed Feb 20, 2026CAElectrical SystemEngineTransmission & Drivetrain

   The car stalled while being driven by my son. It displaced an error code. The Car had to be towed to dealership. It was diagnosed with ICCU unit failure. Needs to wait over a months for parts.

   NHTSA complaint #11719483 · source
8. Filed Feb 20, 2026COFuel, Hybrid & EV PropulsionTransmission & Drivetrain

   Vehicle displayed "Power limited" and slowed to a crawl, was able to drive less than a quarter mile to a safe place before it displayed "Stop vehicle and check power supply" then completely shut down. Diagnosed as ICCU failure by the Hyundai Dealer service technician, with the parts on backorder and no ETA for the 15 or so other Hyundai Ioniq 5's with the same failed ICCU waiting at the same dealership, in front of me.

   NHTSA complaint #11719322 · source
9. Filed Feb 17, 2026MOElectrical SystemEngineTransmission & Drivetrain

   ICCU failure: confirmed by dealership, submitting for your records - while driving the morning of 2/11/26 in Evansville, IN a warning message appeared on the dashboard stating 'Check Electric Vehicle System' followed by a rapid deceleration. Luckily there was not a vehicle behind me as they would have rear ended me. This failure occurred without warning and presented a significant safety hazard, leaving the vehicle stranded in traffic until I was able to restart it. Vehicle…

   NHTSA complaint #11718559 · source
10. Filed Feb 17, 2026ORElectrical SystemTransmission & Drivetrain

    “Check electrical system” warning while driving. Sudden loss of power and speed. “Turtle mode” icon. Limped home 2 miles at <10mph. Vehicle bricked. Towed to dealership.

    NHTSA complaint #11718494 · source
11. Filed Feb 9, 2026WIElectrical SystemTransmission & Drivetrain

    On January 1st 2026 around 11am we were traveling in rural Wisconsin when we heard a loud pop from under the back seat . This we now know from Dahl Hyundai in LaCrosse was the ICCU failing . When this happened we were in blizzard conditions and the car forced us into limp mode and reduced us from 55 mph down to 25mph in bumper to bumper traffic on a rural hwy (this was not a smooth speed transition the car performed ) We drove the vehicle back to the nearest town going 25mph…

    NHTSA complaint #11716852 · source
12. Filed Feb 9, 2026MAElectrical SystemFuel, Hybrid & EV PropulsionTransmission & Drivetrain

    Multiple 12v batteries, the battery management system, and ICCU have all failed on my Ioniq 5. During my 13-month lease, this vehicle has been inoperable for more than 30 cumulative days due to the same recurring defect. The vehicle was taken to an authorized Hyundai dealership multiple times, but the defect was repeatedly misdiagnosed and not corrected, resulting in continued failures and extended loss of use. The defect causes sudden loss of power and complete vehicle…

    NHTSA complaint #11716838 · source

Source: U.S. National Highway Traffic Safety Administration (NHTSA) Office of Defects Investigation public data. Complaints are submitted by owners and are not verified by NHTSA or by us; a complaint does not prove a defect exists. View this vehicle on NHTSA.gov Methodology