Product overview

This Delphi BSM R05-00 is a replacement body/fuse/control module used on various Citroën and Peugeot models. It integrates fused power distribution, relays and control electronics for several engine bay and body circuits. Common search terms and part numbers: 9664706280, 9807028880, 6500HH, 6500FT, 6500KQ, R05-00.

Compatibility

Typical compatible models include Citroën Berlingo (B9), Citroën C4, Peugeot 308 and Peugeot Partner Tepee. Always check the listed product codes against the part number used on the vehicle when searching (9664706280 / 9807028880 / 6500HH / 6500FT / 6500KQ / R05-00).

Function and role

The BSM (Boîtier de Servitude Moteur) houses fuses and relays and contains control electronics that manage power distribution and certain body/engine-related functions. It provides protected power to circuits such as lights, fuel pump relay, ignition relays and sensors, and exchanges information with other vehicle control units. Failure or intermittent faults in the BSM can cause loss of several electrical functions at once.

Replacement procedure

General replacement steps for experienced mechanics or DIYers familiar with PSA vehicles:

• Isolate the vehicle electrically by disconnecting the negative battery terminal before any work.
• Locate and remove any engine bay covers or brackets that block access to the BSM.
• Release the multi-pin connectors carefully using the connector locks or release tabs; avoid pulling on wiring.
• Remove the mounting bolts securing the BSM and withdraw the unit from its housing.
• Install the replacement unit, secure with bolts and reconnect all connectors firmly.
• Reconnect the battery and perform functional checks: lights, starter, fuel pump and other affected circuits.
• If fault codes remain or some features are not restored, perform diagnostics and coding with PSA-compatible diagnostic equipment.

Installation recommendations

• Work in a dry, clean environment to avoid contamination of connectors.
• Inspect connector pins and wiring for corrosion or heat damage; clean or replace damaged terminals before fitting the new unit.
• Ensure the unit is mounted securely; a cracked or damaged mounting tab on the housing is cosmetic if the unit is fixed and connectors are intact.
• After installation, clear fault codes and run a full system check with diagnostic tool to confirm proper operation.
• When in doubt about coding or complex faults, use a technician with PSA diagnostic tools (DiagBox/Lexia/PP2000) for reliable commissioning.

Why this part most often fails

• Water ingress and corrosion in connectors leading to intermittent contacts or short circuits.
• Thermal cycling and vibration causing solder joint or relay wear inside the unit.
• Overloaded circuits or repeated short circuits that stress internal components.
• Physical damage to the housing or connectors from impacts or improper handling during previous repairs.

Technical information

• Manufacturer: Delphi
• Model: BSM R05-00
• Product codes: 9664706280, 9807028880, 6500HH, 6500FT, 6500KQ, R05-00
• Other numbers: R05, 9664706280/9807028880 (used as cross-reference)

Important notes for BSM units

Some BSM units are vehicle-specific and may require diagnostics and coding after replacement to remove stored faults and restore full functionality. If you are not familiar with PSA electrical commissioning procedures, have the unit inspected and configured by a professional workshop with appropriate diagnostic equipment.

Key Features

Delphi BSM R05-00 front fuse/relay control unit designed for a range of Citroën and Peugeot models. Ideal for professional mechanics and experienced DIYers looking for a direct replacement for electrical distribution and control in the engine bay. Commonly searched by product codes 9666700480, 9807028780 and 9807028880 — include these numbers when searching to find the exact match quickly.

Technical Information

• Manufacturer: Delphi
• Model: Citroën Berlingo B9; Peugeot 308; Peugeot Partner Tepee
• Product Codes: 9666700480; 9807028780; 9807028880
• Other Numbers: R05-00; R05; R05/R05-00
• Function: Engine bay fuse and relay module (BSM) controlling multiple power distribution circuits and relays for lighting, wipers, starter/ignition feeds and other vehicle systems.
• Condition Note: Housing may show a cracked mounting bracket that does not affect electrical function.

Installation Recommendations

Before replacement, disconnect the negative battery terminal to avoid short circuits and loss of vehicle data. Remove any securing screws or bolts and carefully unplug all wiring connectors — take note of connector orientation and lock tabs. Mount the unit using intact mounting points; if a bracket is cracked, secure with appropriate fasteners to prevent movement. After installation, verify all fuses and relays are correctly seated and perform a function check of lights, wipers and ignition circuits. On some vehicles, final checks or basic coding may be required to restore certain convenience functions — perform vehicle diagnostics with suitable tools if anything operates intermittently.

Most Common Cause Of Failure

BSM units typically fail due to environmental and mechanical stress. The most frequent issues are water ingress and corrosion of connector pins, thermal cycling leading to solder joint fatigue, and physical damage from vibration or impact. Symptoms include intermittent electrical faults, blown fuses, non-functional relays or complete loss of affected circuits. Preventive measures include ensuring good sealing of the engine bay, clean and dry connectors, and secure mounting to minimize vibration.

Why Choose This Unit

This Delphi BSM R05-00 offers a direct-fit solution for common Citroën and Peugeot applications, with original product codes listed for fast identification. The unit is suitable for workshops and competent home mechanics who need a reliable replacement that restores central power distribution and relay control in affected vehicles.