Description
Product Overview
Delphi BSM B2 (Boîtier de Servitude Moteur) fuse and relay box for PSA Citroën and Peugeot vehicles. Original used unit with guaranteed functionality. Minor damage to some mounting tabs may be present; this cosmetic wear does not affect the electrical performance or operation of the module.
Function And Application
The BSM is the engine-bay fuse and relay box that distributes power to major vehicle systems such as cooling fans, fuel pump, lighting, wipers and other accessories. It combines fuses and integrated relays to protect circuits and manage power distribution. The correct BSM variant (B2) is essential for reliable vehicle operation on compatible Citroën and Peugeot models.
Common Faults And Causes
- Intermittent electrical accessories or sudden failures of fans, pumps or lights.
- Repeatedly blown fuses affecting protected circuits.
- Typical root causes include moisture ingress, connector oxidation/corrosion and thermal stress on terminals or internal components.
Replacement And Installation
Recommended installation steps for mechanics and experienced DIYers:
- Disconnect the negative battery terminal before starting to prevent short circuits.
- Release and label any fuses or connectors if necessary, then carefully unplug connectors from the existing BSM.
- Remove the original unit from its mounting and fit the replacement into the same location. Secure all fastenings and snap-in clips.
- Reconnect all connectors, ensuring they are fully seated and locks engage. Reconnect the battery and verify the operation of all systems protected by the BSM.
When the replacement matches the same BSM B2 variant and product codes, the swap is typically plug-and-play and does not require ECU programming. Always verify connector layout and pin-out before installation.
Compatibility Check
To confirm fitment, compare the type designation (B2), the product code on your existing unit and the connector arrangement. This unit is referenced with codes 9643538180 and 6500 Y1 (also shown as 6500Y1). Exact code and connector match is the fastest route to a trouble-free replacement.
Condition And Shipping
Used original Delphi BSM B2 supplied with a guarantee of functionality. The unit may show normal signs of use, including light scuffs or small cracks on peripheral mounting tabs; such cosmetic issues do not affect electrical performance. Items are carefully packed for safe shipment.
Technical Information
Manufacturer: Delphi
Model: BSM B2 (PSA Engine Bay Fuse/Relay Box)
Product Codes: 9643538180
Other Numbers: 6500 Y1, 6500Y1
If you are unsure about compatibility, please compare the numbers on your existing unit to the codes listed above. Matching codes and connector layout ensure the most reliable and quickest installation.
