This BSM B2 Siemens body/electrical control module is a direct-fit used replacement for a range of Citroën and Peugeot models. The unit handles distribution of fuses and relays and coordinates multiple body electrical functions, making it a common failure point when vehicles suffer from age-related wear, moisture exposure or wiring issues. Supplied as a tested, functioning used part, it is a practical and cost-effective option for professional workshops and DIY enthusiasts performing repairs on PSA group cars.

Compatibility And Typical Applications

Fits Common Models:

• Citroën Berlingo
• Citroën C2
• Citroën C3
• Citroën Xsara
• Citroën Xsara Picasso
• Peugeot 206
• Peugeot Partner

Matches Several Manufacturer Numbers Commonly Queried By Mechanics And Owners, Increasing The Chance Of Quick Discovery Via Search Engines When Searched By Part Number.

How The Part Functions

The BSM Is The Central Module For Several Body Electrical Systems. It Distributes Power To Fuses And Relays And Oversees Circuits Such As Interior Lighting, Indicator Signals, Central Locking, Wiper Control Inputs, And Other Comfort/Body Functions. A Faulty BSM Can Cause Multiple Symptoms Ranging From Non-Working Lights And Central Locking To Intermittent Electrical Faults.

Replacement Procedure (Overview)

• Prepare: Park On A Level Surface, Switch Off Ignition And Remove Key.
• Safety First: Disconnect The Negative Battery Terminal Before Any Work On The Module.
• Access: Remove Any Trim Or Covers To Reach The BSM—Location Varies By Model (Engine Bay Or Passenger Compartment). Follow The Vehicle Manufacturer’s Removal Steps.
• Disconnect: Unplug Electrical Connectors Carefully And Remove Mounting Fasteners.
• Install: Fit The Replacement Unit, Secure Fasteners, Reconnect Plugs And Reattach Trim.
• Restore Power: Reconnect Battery And Verify Basic Functionality. Some Vehicles May Require Diagnostic Initialization Or Coding For Full Functionality.

Installation Recommendations

• Always Disconnect The Battery Before Starting Work To Avoid Short Circuits Or Damage To The Module.
• Inspect Wiring Harnesses And Connector Pins For Corrosion Or Damage; Clean Or Repair As Required.
• Use Correct Torque On Fasteners And Ensure Brackets Secure The Module To Avoid Stress On Connectors.
• After Installation, Check All Affected Functions (Lights, Locking, Wipers, Indicators) And Clear Any Stored Fault Codes With Appropriate Diagnostic Equipment.
• When Coding Or Initialization Is Required, Use Service-Grade PSA Diagnostic Tools For Reliable Results.

Reason Why The Part Fails Most Often

Failures Are Usually Related To Ageing, Moisture Ingress, Corrosion At Connector Pins, Thermal Stress And Intermittent Electrical Contacts. External Damage To Mounting Brackets Does Not Necessarily Affect Electrical Function, But Water Entry Or A Damaged Connector Will Often Lead To Malfunctions. Harsh Operating Environments And Repeated Electrical Overloads Can Also Shorten The Module’s Service Life.

Technical Information

• Manufacturer: Siemens
• Model: BSM B2
• Product Codes: 9650618580, 9650618580-00, 964349898
• Additional Numbers: U11847002 J, 6500Y1, 6500Y3, t11847002

If You Are A Professional Mechanic Or An Experienced DIY Enthusiast, This BSM B2 Is A Practical Replacement Option For Repairing Electrical Faults On Compatible Citroën And Peugeot Vehicles. Follow The Above Safety And Installation Recommendations To Ensure Reliable Operation After Fitting.

Original Siemens BSM B2 (Boîtier de Servitude Moteur) fuse and relay box for Citroen and Peugeot vehicles. This is a used part supplied with a functional guarantee. The unit may show cosmetic wear or a damaged plastic mounting clip; such damage does not affect the electrical performance when installed correctly.

Function And Common Failures

The BSM distributes power and switches key vehicle circuits including the fuel pump, cooling fan, wipers, lights and ignition. Typical symptoms of a failing BSM are intermittent starting, fuel pump dropouts, non-functioning wipers or fan and sporadic electrical faults. Failures commonly result from moisture ingress, corrosion of connector pins or overheating of internal relays.

Fitment And Compatibility

Compatibility includes, but is not limited to, Citroen Berlingo, C2, C3, Xsara, Xsara Picasso and Peugeot 206 and Partner. Always compare the BSM variant (B2), the part number 9643498980 and the connector layout with your original unit before ordering. When part numbers and connectors match, replacement is generally plug-and-play without additional coding.

Replacement Procedure

Before any work, disconnect the vehicle battery. The BSM is located in the engine bay near the battery. Release the fuse/connector locks and carefully remove the unit. Transfer fuses and relays to the replacement unit in the original configuration if required. After installation, verify fuse ratings against the vehicle wiring diagram. A correctly matched BSM operates without further programming.

Why Choose This Original Used Part

Factory Siemens quality and exact electrical compatibility with PSA wiring offer better reliability than generic universal modules. This used BSM provides an economical original-spec replacement with a functional guarantee and is often sought under the catalog numbers listed below.

Technical Information

• Manufacturer: Siemens
• Model: BSM B2 (Engine Fuse And Relay Box, under-hood)
• Product Codes: 9643498980, 9643498980-00
• Additional Numbers: 6500.Y1, 6500.Y3, T11847002

Before ordering, compare the BSM marking (B2), part number 9643498980 and the connector shape with your original unit to ensure a fast, trouble-free installation and full functionality of all powered circuits.