The official notice
Defect
On certain vehicles, the high-voltage battery could overheat. As a result, the battery could create smoke or heat, which can melt or damage the battery and nearby parts. Note: This recall only affects plug-in hybrid (PHEV) models. This recall replaces Transport Canada recall no. 2025-064. Vehicles that were repaired under that recall don't require this repair.
Safety Risk
A battery that overheats can create a fire risk.
Remedy
To reduce the safety risk, Audi advises not to charge your vehicle until the recall repairs have been completed. Audi will notify owners by mail and advise you to take your vehicle to a dealership to install an advanced diagnostic software that will monitor the high-voltage battery and warn you if it detects a problem. If you see this warning, you should contact a dealership to arrange replacement of the affected high-voltage battery module.