2023 Hyundai Ioniq 5 — Known Issues & Recalls

Your dashboard displayed a "Check Vehicle Electrical System" warning, and your car's Integrated Charging Control Unit (ICCU) failed, leaving you unable to drive. Your car completely died and had to be towed in freezing temperatures. Even though Hyundai previously recalled your vehicle for this same issue and performed the recall service, the problem has returned.

Your car's Integrated Charge Control Unit (ICCU) failed and caused the vehicle to lose power while you were driving, which could have caused an accident. The problem occurred after all recall work was completed. Hyundai replaced the part under warranty and the issue is now resolved.

Your car's integrated charging control unit (ICCU) has failed, preventing the vehicle from charging. You may see error messages like "charging unsuccessful" or "check electrical vehicle system" when you try to plug in, and the ICCU failure may also damage external charging stations you connect to. The dealer has confirmed the fault and will need to replace the ICCU unit, which typically takes less than a week for parts availability.

12 volt battery keeps dying for normal reason. It was replaced last year. I have to jump it a few times a day.

Your car's all-wheel drive system stopped working and required replacement of the traction motor. This is an electrical system issue that affects your car's ability to deliver power to all four wheels.

Your car's Integrated Charging Control Unit (ICCU) has failed, which controls the charging system. This could prevent your vehicle from charging properly or cause charging to stop unexpectedly. The repair will likely require replacing the faulty ICCU module.

Your 2023 Ioniq 5's Integrated Cluster Control Unit (ICCU) was replaced in 2025, but it failed again in late January 2026. The car has been sitting at the dealership waiting for a replacement part. This is an electrical system issue that's preventing normal vehicle operation.

Your car's Integrated Cluster Control Unit (ICCU) failed while you were driving, causing a loss of function. You were fortunate to reach home before the failure became more serious, but if this happens on a highway, you could be stranded. The repair will require replacing the faulty ICCU unit.

Your car's Integrated Charging Control Unit (ICCU) has failed for the second time, leaving you without the vehicle for about 2 months while waiting for repairs. The dealer replaced it with the same part, which means the underlying issue may not be fully resolved and the new part could fail again.

Your car's Integrated Charging Control Unit (ICCU) may have failed while you were trying to charge the battery when it was at 16%. You heard a popping sound from underneath the vehicle, and the dashboard displayed a warning message to check the electrical system. The issue will likely require diagnosis and replacement of the charging control unit.

Your car's Integrated Charging Control Unit (ICCU) failed completely, leaving you unable to drive. This component controls charging functions in your electric vehicle, and you report this is a known issue affecting multiple Ioniq 5 owners without a permanent fix from Hyundai yet. A replacement of the ICCU unit will be necessary to restore your vehicle's charging and driving capability.

My 2023 Hyundai Ioniq 5 suddenly malfunctioned on Sunday, March 1, 2026. The vehicle abruptly lost power, would not accelerate beyond 25 miles per hour, and then completely died within minutes. This left me stranded on the roadside off the highway, and the car had to be towed to the dealership.

I started the car and put down all 4 windows simultaneously. I heard a pop and a dash warning "Check electrical system". I knew this is symptomatic of an ICCU failure and the car will not be driveable for very far.

I received a "Stop vehicle and check power supply" alarm on my dash after starting the car and leaving a parking garage. Then a "12V battery voltage low" message along with the "turtle mode" icon which limits the car to under 20 MPH. I pulled over to a side street as I did not want the car to die on a main road and impede traffic or get hit.

Your car's battery drained much faster than normal and the vehicle entered limp mode (reduced power) while driving on the highway, forcing you to pull over multiple times to reach a charging station. Even after charging to 80%, the range dropped to only 100 miles instead of the normal distance. The dealership diagnosed that your main battery pack needed complete replacement, and the ICCU (Integrated Charging Control Unit) had previously been replaced as well. Fixing this issue will require replacing the entire high-voltage battery pack, which may take several months for parts availability.

On Sunday, March 1, 2026, my vehicle suddenly malfunctioned while I was driving. The car abruptly lost power, would not accelerate beyond 25 miles per hour, and then completely shut down within minutes. This left me stranded on the roadside off the highway, which was both dangerous and extremely distressing.

Your Integrated Charging Control Unit (ICCU) failed, leaving you stranded and requiring a tow truck. This component controls the charging system in your electric vehicle. Repair will likely involve replacing the ICCU module.

Your car's ICCU (Integrated Charging Control Unit) failed about a year after receiving a software update that was meant to fix the problem. You're concerned that Hyundai hasn't fully resolved the underlying issue, and you worry the replacement part may fail again for the same reason. The repair will likely involve replacing the ICCU component and potentially applying updated software.

On [XXX], I received a warning on my 2023 IONIQ 5 that said “stop vehicle and check braking system” and the car went into “turtle mode”. I took it into the dealer for repairs and they said the issue was related to the 12V battery and returned the car to me as repaired. Then, on [XXX], I was driving the car and I got the same error message but this time the car’s brakes didn’t work.

Entered car on very cold day. Put heater and defroster on high, drove about a mile and then the window cracked.