Hyundai Ioniq 5 Battery Health, Range & Degradation

The Hyundai Ioniq 5 was the first car on Hyundai's dedicated 800V E-GMP platform, and it reset expectations for a mainstream EV: 18-minute rapid charging, a flat floor and genuine long-distance ability. On the used market it is now one of the most common family EVs in the UK and Ireland. But two Ioniq 5s of the same age can be very different cars underneath, depending on battery version, charging history and whether outstanding recall work was completed. Here is what to check before you buy.

Real-world range by version

The Ioniq 5 has been sold with several different battery sizes since 2021, and the facelift in 2024 changed them again. All figures below are WLTP unless noted, and real-world range will be lower in cold weather and at motorway speeds. See why EVs deliver less range than advertised for the reasons.

Version (years)	Battery	WLTP range	Notes
58kWh RWD (2021 to 2024)	58kWh	Up to 238 miles	Entry pack, single motor
72.6kWh / 77.4kWh RWD (2021 to 2024)	up to 77.4kWh	Up to around 315 miles	Longest-range pre-facelift
77.4kWh AWD (2021 to 2024)	77.4kWh	Up to around 298 miles	Dual motor uses more energy
63kWh RWD (2024 on)	63kWh	Up to 273 miles	Facelift entry pack
84kWh RWD (2024 on)	84kWh	Up to 354 miles	Facelift long-range

Sources: Honest John and DrivingElectric UK listings. Larger 20-inch wheels and the range-topping Ultimate trim cut the official figures by around five percent, per DrivingElectric. Naming can be confusing on used forecourts, so confirm the actual battery size against the specific VIN rather than the badge.

Battery design and cooling

The Ioniq 5 pack uses high-nickel NCM (nickel-cobalt-manganese, roughly 8:1:1) pouch cells supplied by SK On, the battery arm of SK Innovation, according to InsideEVs teardown coverage. The pack sits on Hyundai's 800V architecture, which is what allows very high charging speeds without excessive heat.

Crucially for a used buyer, the pack is liquid-cooled with active thermal management and a battery management system that limits how hard it is pushed. Heat is the single biggest driver of long-term degradation, so a properly cooled pack like this ages more gracefully than an air-cooled design, which is one reason the Ioniq 5 has held up well in high-mileage testing.

How the battery ages

Independent real-world data is reassuring for this car. Recurrent and Recharged, both of which aggregate owner and fleet data, report that most Ioniq 5 packs lose only a few percent of usable capacity in the first three to four years. Typical patterns show around 3 to 6 percent loss in the first year or two, then roughly 1 to 2 percent per year in normal mixed use.

The extreme cases are telling. Recharged cites an ultra-high-mileage Ioniq 5 at around 360,000 miles still showing only about 12 to 13 percent loss, and Hyundai Motor Group's own brand journal documents a taxi that covered 580,000 km in 33 months and retained 87.7 percent State of Health. These are single vehicles, not fleet averages, but they point the same way: the chemistry and cooling are durable.

What still varies is how an individual car was treated. Recharged notes that heavy DC fast charging in hot conditions, combined with routinely charging to 100 percent and leaving it there, can push loss higher over eight to ten years. That is exactly why the badge and the age tell you so little, and why you should check the true battery health of a used EV rather than trust the dashboard. Our guide to what counts as a good battery health percentage helps you judge the number you get.

Known issues and recalls

The most significant issue on the Ioniq 5 concerns the Integrated Charging Control Unit, or ICCU. If it fails, it can stop the 12-volt battery from charging, which in rare cases leads to a loss of drive power and a warning to check the electric vehicle system.

In the United States, Hyundai issued recall 24V204 in March 2024 and expanded it to 24V868 in November 2024, covering 2022 to 2024 Ioniq 5 cars (source: NHTSA campaign numbers reported by Cars.com and Recharged). Remedies typically involve a software update, inspection of the ICCU and its fuse, and replacement of failed parts. In April 2026 Hyundai extended ICCU cover in the US to 15 years or 180,000 miles.

Two points matter for UK and Ireland buyers. First, those are US campaign numbers, and recall scope and reference numbers differ by market, so a US action is not automatically a UK recall. Always check the exact car by registration against the DVSA and SMMT recall check for the UK. Second, a recall record only tells you a campaign exists, not whether the work was actually completed on that vehicle. The Ioniq 5's E-GMP sibling, the Kia EV6, shares the same ICCU concern, so the same check applies there.

It is also worth separating this from older Hyundai battery-fire recalls, which affected the earlier Ioniq Electric and Kona Electric using LG cells. The Ioniq 5 uses SK On cells and was not part of that campaign.

An independent battery and system inspection is the cleanest way to confirm whether a specific Ioniq 5 has had its ICCU work done and whether the high-voltage pack is healthy. Watch for the warning signs of a failing EV battery too.

Battery warranty

Hyundai UK warrants the high-voltage battery for 8 years or 100,000 miles, whichever comes first (source: Hyundai Motor UK). The pack is deemed to have failed if maximum capacity falls below 70 percent of its original figure within that period, in which case Hyundai repairs or replaces it.

Cover normally transfers to subsequent owners until it expires, which is good news on the used market. However, if the car was ever used as a taxi, private hire or driving school vehicle, battery cover reduces to 5 years and 100,000 miles. Given how many Ioniq 5s have been used commercially, this is worth confirming.

A manufacturer warranty only pays out below 70 percent, which is a low bar. A car at 82 percent has lost real range and value but is nowhere near a warranty claim, so knowing the exact figure protects your money. That is what an independent, TÜV Certified test gives you, and it is why the resulting battery certificate is becoming a normal part of used EV deals.

Frequently asked questions

What is a good battery health percentage for a used Hyundai Ioniq 5?

Real-world data from Recurrent and Recharged suggests most Ioniq 5 packs lose only a few percent in the first three to four years, so a car up to around four years old should still show a State of Health in the low-to-mid 90s. Anything much below that for the age and mileage is worth investigating with an independent test.

How much real-world range does a used Hyundai Ioniq 5 have?

It depends on the battery version. Early 58kWh cars are rated up to 238 miles WLTP, the larger 77.4kWh rear-drive version up to around 315 miles WLTP, and the facelifted 84kWh up to 354 miles WLTP. In cold weather and at motorway speeds expect meaningfully less than the WLTP figure, as with any EV.

Is the Hyundai Ioniq 5 affected by the ICCU recall?

Some are. Hyundai issued US recalls 24V204 and 24V868 covering 2022 to 2024 Ioniq 5 cars for an Integrated Charging Control Unit fault. UK owners should check the vehicle against the DVSA and SMMT recall database by registration, because scope differs by market. An independent inspection also confirms whether the work was carried out on that specific car.

How long is the Hyundai Ioniq 5 battery warranty?

Hyundai UK covers the high-voltage battery for 8 years or 100,000 miles, whichever comes first, and treats it as failed if capacity drops below 70 percent within that period. Cover normally transfers to the next owner, but drops to 5 years and 100,000 miles if the car was ever used as a taxi, private hire or driving school vehicle.

Does rapid charging damage the Ioniq 5 battery?

The 800V E-GMP platform is liquid-cooled with active thermal management, which helps protect the pack during frequent fast charging. Recurrent and Recharged data shows heavy DC fast charging in heat combined with constant 100 percent charges can push degradation higher over many years, but normal mixed use tends to show modest loss.

Should I get an independent battery test before buying a used Ioniq 5?

Yes. The dashboard range estimate and a seller's word do not tell you the pack's true State of Health or whether outstanding recall work was completed. A TÜV Certified independent test reads the battery directly and gives you a certificate for this specific car, for £100.