Description
BSI Siemens E01-00 for Citroën Xsara Picasso and Berlingo, and Peugeot 206 and Partner.
This Siemens BSI E01-00 body control unit (Comfort Module) is designed for selected Citroën and Peugeot models and is commonly referenced by OEM codes such as 9657999680 and S118085320 F. The unit centrally manages vehicle comfort and body functions including lighting, wipers, central locking, interior lights, alarm and immobilizer interface, and acts as a CAN gateway between subsystems. This description is written for professional mechanics and experienced DIYers who perform electrical and control-unit replacements on PSA vehicles. Keywords: BSI, Siemens BSI, E01-00, 9657999680, S118085320 F, Citroën Berlingo, Citroën Xsara Picasso, Peugeot 206, Peugeot Partner.
Replacement of the BSI typically involves removing interior trim to access the module (commonly found behind the glovebox or lower dashboard on the passenger side), unplugging multi-pin connectors and screws, and either cloning or reinitializing the unit to the vehicle. Because the BSI stores vehicle-specific immobilizer and configuration data, correct commissioning is essential for full functionality. Handling requires ESD precautions and care with connectors to avoid damage.
Technical Information
- Manufacturer: Siemens
- Model: BSI E01-00 — Applicable Models: Citroën Xsara Picasso; Citroën Berlingo; Peugeot 206; Peugeot Partner
- Product Codes: 9657999680; S118085320 F; 1650882480
- Additional Numbers: 650883080; 6580T5; 6580EZ; 6580EY; 6580GY; 1650882680
Installation Recommendations
- Disconnect the negative battery terminal before any work to avoid short circuits and to protect the unit.
- Locate the BSI (typically behind the glovebox or lower dashboard passenger side), remove trim panels and fasteners, then carefully unplug connectors using proper tools.
- Avoid pulling on wiring harnesses; release locking tabs on connectors to prevent damage.
- If reusing the vehicle’s immobilizer/key data, perform EEPROM/Flash cloning to restore plug-and-play operation. If cloning is not possible, the unit must be virginized and coded to the vehicle.
- After installation, verify all comfort and body functions (central locking, lights, wipers, instrument cluster messages) with diagnostic equipment.
Installation and Coding – Important
- The Unit Is Used And Is “Paired” With The Original Vehicle (VIN/PIN/Keys).
- Options For Commissioning:
- Cloning Data From The Old Unit (EEPROM/Flash) – After Cloning The Unit Is Plug And Play.
- Virginization And Subsequent Initialization/Telecoding Via DiagBox (Or Online) + Key Adaptation.
- Recommended To Be Performed By A Specialist With PSA Service Equipment (DiagBox/Lexia/PP2000).
- Before Disassembly/Assembly Always Disconnect The Battery And Follow Manufacturer Procedure To Avoid Damaging The Unit.
Why This Part Most Often Fails
Common failure causes include water ingress or high humidity reaching the connector area, corrosion of pins, solder joint fatigue on the PCB, damage from jump-starts or voltage spikes, and long-term degradation of electronic components. Failures may also stem from poor connector contacts or broken wires in the harness. Symptoms typically include intermittent or complete loss of central locking, lighting anomalies, immobilizer faults, erratic instrument messages, or communication errors on the CAN network.
Practical Notes For Mechanics
- When replacing a BSI, plan for time to clone or program the unit; simple swap without proper commissioning frequently results in immobilizer or convenience faults.
- Inspect connector seals and harness routing for signs of water damage and address any corrosion before reinstalling the new unit.
- Keep replacement screws and trim organized; reusing damaged fasteners can cause poor grounding or vibration-related faults.
This product listing targets professionals and experienced DIYers familiar with PSA vehicle electronics. Ensure the procedural steps and commissioning method match workshop capabilities before starting the job.
