This Hyundai Ioniq 5 Has Over 400,000 Miles. Here’s What Broke

It's an impressive feat for any car, but with one big catch.

High-mileage Hyundai Ioniq 5

Photo by: 수와호수스와호수 (YouTube)

Iulian Dnistran

By: Iulian Dnistran

Mar 28, 2025 at 12:00pm ET

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This is possibly the highest-mileage Hyundai Ioniq 5, with over 400,000 miles on the odometer.
The car hasn't had a ton of issues, but it did need a new battery pack at 360,000 miles.
Unsurprisingly, the Integrated Charging Control Unit (ICCU) also failed.

The Hyundai Ioniq 5 electric crossover has been quite successful, and it’s easy to see why. It’s a comfortable, stylish and capable EV, albeit one that can’t quite match the Tesla Model Y when it comes to driving range.

Nevertheless, Hyundai has sold hundreds of thousands of Ioniq 5s all over the world since its debut a few years ago. Despite fears of getting stranded in the middle of the road because of a dead 12-volt battery (something that is being handled through an active recall campaign), all the EVs based on the Hyundai’s E-GMP platform have proven to be mostly trouble-free.

And if the video embedded below (in Korean) isn’t proof that the Ioniq 5 is a robust car, I don’t know what is. Remember, I said “robust” and steered clear from describing it as “reliable.” That’s despite its owner (or at least we think that’s the owner speaking) saying that if he ever wins the lottery, he would buy another Ioniq 5 in a heartbeat.

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What you have here is most likely the highest-mileage Hyundai Ioniq 5 in existence, with no fewer than 413,992 miles (666,255 kilometers) on the clock. That’s an impressive distance, especially considering the car is a little over three years old. In fact, the car was driven 378 miles on average every day, which is not for the faint of heart.

So, what went wrong? A lot and not very much at the same time. The differential oil and brake fluid have been regularly changed, and the car cannot currently charge from an AC source because the Integrated Charging Control Unit (ICCU) is malfunctioning and needs changing. The car went into limp mode once.

The big one, however, is that the high-voltage battery was changed for free at around 360,000 miles at Hyundai Motor’s Namyang R&D Center. That’s unusual because Hyundai’s battery warranty is mileage-dependent, but it could be that the company wanted to run some sort of analysis on the dead pack. It may have also wanted the good PR that comes with a car hitting 400,000 miles. When it died, the old battery still had an 87% state of health, according to an English translation of the video. The owner also said that he regularly uses DC fast chargers and charges to 100%.

That’s quite impressive, except for the high-voltage battery replacement. In the United States, the Ioniq 5’s warranty covers the pack for ten years or 100,000 miles. If it fails outside these limits, an owner would be looking at a hefty repair bill in the tens of thousands of dollars.

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Granted, this particular case is extremely rare. Most Americans drive about 13,500 miles per year on average, according to the U.S. Department of Transportation's Federal Highway Administration (FHWA), which means it would take the average Joe 30 years to reach 413,000 miles.

We reached out to Hyundai to find out more about this high-mileage Ioniq 5 and will update this article when we hear back.

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