The official notice
Defect
On certain vehicles, the bolt for the ground terminal on the auxiliary heater may not have been properly tightened. As a result, the ground terminal and nearby parts could overheat and melt.
Safety Risk
Wiring that overheats and melts could create the risk of a fire.
Remedy
Subaru will notify owners by mail and instruct you to take your vehicle to a dealership to replace the PTC (positive temperature coefficient) heater ground bolt. The ground wire and the connector holder will be replaced, if necessary. Subaru advises not remote start your vehicle using Subaru Starlink Connected Services (if equipped) or an aftermarket remote starter (if installed). Subaru also advises not leave the vehicle running while unattended, and that you should park it outdoors and away from other vehicles or structures until the recall repairs have been completed.