General Motors has issued a second recall on Chevrolet Bolt electric vehicles due to fire risks with its lithium-ion batteries.
A number of the vehicles were built between 2017-2019 using high voltage cells produced at LG Chem’s Ochang, Korea, facility that may pose a risk of fire when charged to full, or close to full, capacity.
GM is notifying owners that it has developed a remedy to complete the previously announced global safety recall last November of 68,667 Bolt vehicles after a series of fires.
As part of the fix Bolt dealers will use GM-developed diagnostic tools to identify potential battery anomalies and replace battery module assemblies as necessary.
The fix also includes the installation of diagnostic software into the vehicles that can detect issues related to changes in battery module performance before problems develop.
When the vehicle is updated with the new software, the 90% state of charge limitation— imposed by the US National Highway Traffic Safety Administration—will be removed so the battery is returned to its previous maximum charging capacity.
Customers of 2019 model year Chevrolet Bolt EVs were able to have this fix performed from 29 April, and customers who own 2017 and 2018 model year Bolt EVs were eligible to have the fix performed from 26 May.
GM said it would also make advanced diagnostic software available to all other Bolt EV owners in the coming months.
Additionally, they will be making this diagnostic software standard in the 2022 Bolt EV and EUV, as well as future GM electric vehicles.