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Transmission and drivetrainPart report

2023 Hyundai Ioniq 5 Transmission and drivetrain Problems

Complaints
72about this part
Share
19%of 388 total for the year
Median mileage
—not reported
Trend
Too newThis model year is less than 4 years old, so a trend is not meaningful yet.

NHTSA recorded 72 complaints about the transmission and drivetrain of the 2023 Hyundai Ioniq 5, 19% of the 388 complaints for this model year. 2 of these say a crash was involved and 1 a fire, according to the filers. 1 recall campaign on record is filed under a similar system.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“While driving my 2023 Ioniq5 I got a warning on the dashboard about losing power and immedately the car slowed itself down to about 15 MPH, once I was able to get to a safe spot to pull over I stopped the car and it would not start again. I had it towed to the dealer and it has been a week and the ICCU is still on backorder. No idea when I will have the car back.”

NHTSA complaint #11713769, filed 2026-01

“The ICCU on my Ioniq 5 failed about a year after getting the software update that supposedly addressed the issue. I am very concerned about the reliability of my car going forward as it doesn't appear Hyundai has addressed the issue and I have no reason to think the replacement ICCU component won't fail as well.”

NHTSA complaint #11725456, filed 2026-03

“Code P1A9096 Iccu and fuse. The car is currently at a dealer in Barre, VT. While driving numerous warning lights appeared lowering my speed to 10 MPH immediately leaving me vulnerable to a collision in moving traffic. Warning lights include Check Vehicle Electric System , Power Limited . Issue confirmed at dealer.”

NHTSA complaint #11660750, filed 2025-05

“I drove on the freeway around 70 miles/H last July 14th, 2023 with my wife. But suddenly the speed dropped down after I dropped my car at NORM REEVES Hyundai dealer. They keep 4 days for the test. They said all test is OK. But I am afraid to drive on the freeway. I Leased Jun 17th, 2023 new IONIQ5. Is this OK? What should I do?”

NHTSA complaint #11534083, filed 2023-07

“Having the same ICCU Failure that all other Ioniq 5 owners have. On February 26th, I was heading to work when I heard a pop and car displayed warning lights saying check EV system and stop safely. Car was limped home and towed to dealer. Was told fix will take a month.”

NHTSA complaint #11721884, filed 2026-03

Related recalls

Related service bulletins

Transmission and drivetrain: other model years

YearComplaintsShare of year
20255719%
20243716%
20237219%
20228521%

Other parts of the 2023 Hyundai Ioniq 5

Electrical system
273 complaintsFuel system
67 complaintsOther or unknown
44 complaintsEngine
38 complaintsForward collision avoidance
26 complaintsBrakes
24 complaintsVehicle speed control
18 complaintsLane departure
9 complaintsExterior lighting
8 complaintsTires
6 complaintsSteering
4 complaintsBody and structure
4 complaints

← All problems reported for the 2023 Hyundai Ioniq 5

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 31, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology