Description
BSC B03-00 SIEMENS VDO CONTINENTAL for trailer connection for Citroen Peugeot cars
Original Siemens VDO / Continental trailer control unit (BSC) for PSA – Citroën and Peugeot cars. The unit ensures the correct connection and control of the trailer/towing equipment electrics, communicates with BSI via CAN and adapts the car’s functions when the trailer is engaged. Search codes: 9678751080, S180085005A, 9688EL.
This BSC unit is intended for vehicles with preparation for towing equipment. It provides power supply and control of trailer lights, monitoring of current consumption and signaling of defective bulbs, as well as integration with parking sensors (automatic temporary switching off of the rear PDCs when the trailer is connected) and, in selected equipment, also support for stabilization of the kit via ESP. Compared to universal modules, it maintains factory diagnostics and full compatibility with the car’s electronics.
Compatibility: selected versions of Citroën Berlingo III, Citroën C4 Picasso, Peugeot 3008 I, Peugeot 5008 I and Peugeot Partner III. Always compare the part number from the label of your original unit with the codes 9678751080 / S180085005A / 9688EL, or according to the VIN, check with the dealer or in diagnostics whether the BSC variant is suitable for your particular car.
Installation and replacement: usually installed in the rear of the car (boot) where the unit connects to the original towbar wiring. Recommended procedure: disconnect the battery, remove the necessary trim, replace the BSC unit, firmly secure it in the holder, connect the connectors and fuses. After assembly, coding/adaptation via PSA diagnostics (DiagBox/LEXIA) is usually necessary – activating the presence of the trailer module, or setting functions (PDC, checking bulbs). Then perform a trailer light test and check for any error codes.
Typical defects and causes: damage after a short circuit in the trailer socket, oxidation of the connectors due to moisture, overvoltage due to incorrect wiring. When replacing, always follow the code match and do not underestimate the trailer wiring check to avoid damaging the module again.
Technical information
- Manufacturer: Siemens VDO / Continental
- Model: BSC – trailer control unit (variant B04-00; in practice you can also meet the designation B03-00)
- Product codes: 9678751080; S180085005A; 9688EL
- Other numbers: BSC B04 00; BSC B03-00
Key Searches: Citroën/Peugeot Towbar Control Unit, PSA Trailer BSC Module, Siemens Continental S180085005A, 9678751080, 9688EL, Citroën Berlingo III, C4 Picasso, Peugeot 3008 I, 5008 I, Partner III.
