- US-delivered Kia EV6 models have shipped with subpar lead-acid 12-volt batteries.
- As of late 2024, Kia is believed to have been fitting better AGM batteries to its EVs.
- The owner of this 2024 EV6 Wind RWD has initiated a lemon law claim for the faults.
One of the benefits of owning an electric vehicles is reduced maintenance compared to ICE-powered cars. That’s the theory, at least. In practice, one owner has found his Kia EV6 to be less of a technological marvel and more of a recurring electrical problem. His 2024 model has chewed through multiple 12-volt batteries in just a year, prompting him to file a lemon law claim.
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While the EV6 has been broadly praised as being an excellent EV, it’s not without fault. Over the years, there are have been several reports of battery failures. We’re not talking about the expensive high-voltage battery pack that powers the motors, but rather the 12-volt battery. According to one Facebook group user, he has gone through three of four of these batteries and says he’s initiated a lemon law claim.
Read: First Look At 2025 Kia EV6 GT With Ioniq 5 N Power And Simulated Gearbox
Most Kia EV6s delivered in the United States come standard with traditional lead-acid 12-volt batteries, rather than AGM (Absorbed Glass Mat) batteries, which are generally considered to be far more superior. AGM batteries use a fiberglass mat to hold the electrolyte, offering better cycling performance and longer lifespan.
The most recent battery installed in this particular EV6 appears to have been one of the lower-grade OEM lead-acid units, and it clearly failed well ahead of schedule.
A photo he shared on the EV6 owner’s Facebook page shows acid leaking from the failed battery and corroding the tray beneath it. According to the owner, his EV6 Wind RWD has only about 4,500 miles on the odometer after one year of ownership and yet it’s already gone through multiple 12-volt batteries.
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The general consensus among other EV6 owners appears to be that the original 12-volt batteries from Kia aren’t up to par, and it’s better to just install an AGM and move on. What’s puzzling is that the dealership handling this particular case hasn’t done so, especially since, according to users on the Kia EV Forums, the Korean carmaker began equipping EV6s with AGM batteries from the factory as of late 2024.
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