According to a recent report from Car Complaints, the federal agency said that although the investigation is now closed, it “reserves the right to take additional action if warranted by future circumstances.”
The investigation was first opened in October of 2020 after reports that units of the Chevy Bolt EV and Chevy Bolt EUV had caught fire while charging or when the vehicles were towards the end of the battery charging cycle. General Motors initially issued a recall in November of 2020 that included software to address the issue, as well as installation of a replacement battery, if needed.
Later, an investigation from battery supplier LG Energy Solution revealed further fires had occurred with vehicles that had received the initial fix, resulting in further recalls from GM. It was eventually determined that the fires were the result of two individual manufacturing defects in the batteries themselves, specifically a torn anode tab and also a folded separator.
In response, General Motors expanded the existing recalls to include all units of the 2017 through 2022 Chevy Bolt EV and Chevy Bolt EUV to replace the vehicle battery packs. It’s estimated that the recall will cost upwards of $2 billion, with battery provider LG Energy Solution covering the majority of the recall costs.
The new replacement batteries will be covered by an 8-year / 100,000-mile warranty in the U.S., as well as an 8-year / 160,000-km warranty in Canada. Additionally, the repair includes new software that will monitor the new batteries for potential problems.
Chevy Bolt EV and Chevy Bolt EUV owners that have received a replacement battery will also be given a Chevrolet Certified Battery Update window cling to prove that their vehicle has received the fix, as GM Authority covered previously.