Description
Original Delphi BSM B2 engine fuse and relay box (BSM B2) designed for selected Citroën and Peugeot models. This engine bay power distribution module controls and protects circuits such as ignition, fuel pump, cooling fans, wipers, lights and injection. Frequently sought by professionals and DIYers using OE references 9650664180 or 6500.Y1, this unit restores reliable electrical supply when the original BSM fails.
Compatibility
Fits selected PSA models including Citroën C2, C3, C5, C8, Berlingo, Xsara, Xsara Picasso and Peugeot 206, 307, 406, Partner. Always compare the BSM variant (B2) and OE numbers on your original unit, since fuse and relay layouts can vary by engine type and year of manufacture.
Common Symptoms And Causes
Typical signs of a failing BSM include intermittent engine shutdown or failure to start, non‑working fuel pump or cooling fans, loss of lights or wipers, and signs of overheating or corrosion in the box. Failures are most often caused by thermal stress, moisture ingress and subsequent oxidation of contacts. These issues disrupt power distribution to critical engine and body circuits.
Replacement And Installation
Before any work, disconnect the battery (negative terminal). Compare the unit label (Delphi, BSM B2, OE numbers) and connector layout with the part currently fitted in the vehicle. Swap the unit and make sure fuse and relay positions match the original configuration. In most cases the BSM B2 is a plug‑and‑play replacement and does not require immobiliser or central unit coding — it is a power/distribution module rather than an immobiliser unit. Note: this particular unit may have one or more damaged plastic mounting tabs; this typically does not affect electrical function but adjust mounting accordingly.
Technical Information
- Manufacturer: Delphi
- Model: BSM B2 (Boîtier de Servitude Moteur)
- Product Codes: 9650664180; 6500.Y1; 6500 Y1
- Additional Numbers: BSM B2
Advantages of choosing this original Delphi B2 unit include correct OE fitment, direct compatibility with many PSA vehicles and straightforward replacement for quick restoration of full electrical functionality. Always verify OE numbers and connector arrangement before purchase to ensure perfect fit for your Citroën or Peugeot.
