Description
BSM R03 DELPHI Unit for Citroën and Peugeot vehicles. Some of the mounting brackets may be damaged — this does not affect functionality. This is a used part supplied with a functional warranty.
The BSM R03 Delphi (part number 9675878080) is a commonly fitted body control module in a range of Stellantis passenger cars and light commercial vehicles. This unit handles power distribution, fuses and relays for multiple vehicle systems and is often searched for by its product code 9675878080. Designed for professional workshops and competent DIY mechanics, the module offers a practical replacement option when the original unit shows electrical faults or intermittent behaviour.
Technical Information
- Manufacturer: Delphi
- Model: BSM R03
- Product Codes: 9675878080
- Other Numbers: No additional OEM numbers provided
Fitment
Typical applications include Citroën Berlingo B9, Citroën C8, Peugeot 807 and Peugeot Partner Tepee. Always verify that the part number matches your vehicle requirements before installation.
Function
The BSM (Body System Module) acts as a power distribution and relay/fuse centre for numerous body and auxiliary circuits. Common responsibilities include supplying and switching power to lighting, wiper systems, central locking, interior electronics and other engine auxiliary components. The unit integrates relays, fuse holders and electronic switching to coordinate these systems.
Replacement Procedure
Basic replacement steps for experienced technicians or skilled DIYers:
- Disconnect the negative battery terminal and ensure all ignition circuits are off.
- Locate the BSM (usually positioned in the engine bay/fuse box area on the inner wing or near the battery, depending on model).
- Remove any protective covers and unfasten the retaining bolts or clips securing the unit.
- Carefully unplug all electrical connectors, noting their positions and locking tabs.
- Install the replacement unit, reconnect connectors and secure mounting hardware.
- Reconnect the battery and verify proper operation of affected systems; run a diagnostic scan if available.
Mounting Recommendation
Before installation, inspect connector pins and housings for corrosion or damage. Clean mating surfaces and apply a thin layer of dielectric grease to protect against moisture where appropriate. Ensure the unit is mounted securely to the chassis using original-style fasteners; loose mounting can cause vibration-related faults. Follow manufacturer safety procedures when working on the electrical system and always disconnect the battery prior to removal or installation.
Why This Part Fails Most Often
Common causes of BSM failure include water ingress and connector corrosion, electrical overloads or short circuits, thermal stress and aging of internal components. Mechanical damage to mounting brackets is frequently observed (as noted above), but such damage typically does not impair the electronic functionality. Failures are more likely on higher-mileage vehicles or those exposed to moisture and road salt.
Notes for Mechanics and DIYers
This is a used unit offered with a functional warranty. Some cosmetic damage to mounting points may be present without affecting operation. If the vehicle exhibits persistent electrical faults after replacement, a full diagnostic check is recommended to rule out wiring faults, short circuits or other related component failures.
