8352406 BMW E38 7 Series Trailer Towbar Module – OEM Used & Tested

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This BMW trailer towbar module is a genuine OEM electronic component for BMW E38 7 Series models. Primary OEM number 8352406. It is designed to manage the electrical trailer connection of the vehicle, switching the trailer lights and turn signals and monitoring the connected load when a trailer or carrier is attached to the towbar. It is built to the original BMW specification, so fit, connector layout and electronic behavior match the factory unit it replaces.

Its job is to receive the lighting requests from the vehicle, switch the matching outputs on the trailer socket and detect whether a trailer is connected. A properly working trailer towbar module supports correct trailer lighting, safe towing and correct operation of the towbar electrical system. Because the unit works together with other control modules on the vehicle, its hardware and software revision matter for correct communication.

Common signs of a faulty unit include trailer lights that do not work, turn signals that flash incorrectly, a trailer detection that does not respond, or related warning messages in the instrument cluster. When the module is defective or has lost communication, the trailer lighting may stop working entirely, and stored fault codes can point to the control unit or its circuit. Intermittent faults are also possible, appearing only when the vehicle is warm or after rain.

This is a used original part, removed from a vehicle and tested before sale. Match the exact OEM number 8352406 before ordering. Professional installation is recommended, and coding or programming to the vehicle may be required where applicable. Checking the part number printed on the label of your original unit is the safest way to confirm compatibility.