Electric vehicles (EVs) are considered easier to maintain than internal combustion cars because they don’t require routine tasks like oil changes or timing belt replacements. These advantages have been a major selling point. However, recent reports of repeated 12V battery failures in Kia EV6 vehicles in the U.S. have raised questions about that perception.
The issue drew attention after a U.S. owner of an older EV6 RWD model reported replacing the 12V battery four times in a single year. The owner also alleged that lead leaked from the battery, causing corrosion in the undercarriage tray.
Owner Files Lemon Law Suit Amid Image Concerns
The issue escalated when the owner filed a Lemon Law lawsuit in California, seeking to return the vehicle. Despite having only 7,200 km (approximately 4,474 miles) on the odometer, the vehicle experienced repeated 12V battery failures and visible corrosion. The standard lead-acid battery used in the EV6 has raised concerns due to its limited reliability in EVs that rely heavily on electronic systems.
In contrast, AGM (Absorbent Glass Mat) batteries are known for their stability and long-lasting performance without leakage, as they absorb the electrolyte into a fiberglass mat. The EV6 in question uses a lead-acid battery, which fails even after replacements. EV6 community forums now recommend that others proactively upgrade to AGM batteries at their own cost. One U.S. driver reported three years of trouble-free use after installing a $250 AGM battery.
Kia has marketed the EV6 as a cornerstone of its electrification strategy, with the GT trim showcasing cutting-edge features like 585 horsepower, an electronic limited-slip differential, and cold-weather optimization. However, recurring issues with basic components could tarnish the brand’s overall quality perception.
Dealer Response Raises Additional Concerns
The problem is not limited to the battery itself. Some dealerships have continued installing the same type of lead-acid battery, and owners have reported inadequate cleanup of leaked acid and corrosion prevention. These issues are contributing to growing dissatisfaction with Kia’s customer service approach.
While Kia intends to transition to AGM batteries for the EV6 beginning in the second half of 2024, there are still cases where the older battery type is used, indicating that further improvement is needed. The 12V battery is essential for running the car’s electronic systems, locks, and communication features, making its reliability a key concern.
While early challenges are expected in an evolving EV industry, repeated failures and inconsistent service responses can erode consumer trust. Given the EV6’s importance to Kia’s future, the automaker must enhance its quality control measures and after-sales support. High performance and efficiency alone are not enough in today’s competitive EV market. Consumers expect safety and reliability in electric vehicles just as much as they value innovative features and design.
One Response
Hyundai/Kia is notorious for terrible customer service. Look at the Theta 2 engines that broke down due to inadequate oil circulation that were replaced with engines that had the identical defect.