8353099 BMW E36 RM IV Rear Window Relay Module – OEM Used & Tested

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This BMW RM IV rear window relay module is a genuine OEM electronic component for BMW E36 models. Primary OEM number 8353099. It is designed to act as relay module IV, switching the electrical loads of the rear window functions, such as the rear window heating, on and off under the control of the vehicle electronics and the driver switches. It sits between the control circuits and the heavy current consumers of the vehicle.

Its job is to receive the switching signals, close the matching relay contacts and supply the high current needed by the connected circuits, so that smaller control lines are protected from heavy loads. A properly working rear window relay module supports reliable switching, correct operation of the connected circuits and a stable supply for the rear window functions.

Common signs of a faulty unit include a rear window heater that does not work or works only intermittently, clicking sounds without any result, relays that stay on and drain the battery, blown fuses in the connected circuit, or functions that stop after the vehicle has warmed up. Faults may appear after cold starts or when several consumers are switched on together. When the module fails, the rear window functions may stop working and the circuit may overheat or lose its protection.

This is a used original part, removed from a vehicle and tested before sale. Match the exact OEM number 8353099 before ordering. Professional installation is recommended, and a check of the fuses, connectors and wiring is advised where applicable.