The official notice
Defect
On certain vehicles, a bracket that secures the engine block heater wiring harness in the engine compartment may be missing. As a result, the wiring could be damaged by contact with the engine drive belt. If this happens, the wiring could overheat or melt when the block heater is plugged in.
Safety Risk
Engine block heater wiring that overheats or melts could create the risk of a fire.
Remedy
Nissan will notify owners by mail and instruct you to take your vehicle to a dealership to inspect, and if necessary, install the missing bracket for the block heater wiring. The dealer will also inspect the engine drive belt and surrounding area for any damage. Nissan recommends that you should not use the engine block heater until the recall inspection and repairs have been completed.