506625 Westfalia Uni CAN Control BMW Trailer Towbar Module – OEM Used & Tested

Description

This Westfalia Uni CAN trailer towbar module is a genuine OEM towing electronics component for BMW vehicles fitted with a Westfalia tow hitch. Primary OEM number 506625. It is designed to manage the trailer socket wiring, switch the trailer lighting circuits and communicate over the CAN bus with the vehicle electrical system, so that a towed caravan, trailer or bike carrier is lit and monitored correctly during use.

Its job is to detect that a trailer is connected, supply power to the trailer tail lights, turn indicators and brake lamps, and pass the trailer status to the car so that bulb monitoring and related driver assistance functions respond properly. A properly working towbar module supports correct trailer lighting, dependable bulb failure detection and correct operation of the towing system under every load and weather condition.

Common signs of a faulty unit include trailer lights that do not work or flicker, a trailer warning message in the instrument cluster, indicators that flash too fast or not at all, blown fuses on the towing circuit and a trailer that is not recognized when plugged in. When the module fails, the trailer lighting may stop working completely, which is both a safety risk and a legal problem when towing on public roads.

This is a used original part, removed from a vehicle and tested before sale. Match the exact OEM number 506625 before ordering. Professional installation is recommended, and coding or registration of the trailer module with the vehicle control units is advised where applicable.