Description
SIEMENS BSI E03-00 control unit for Citroën and Peugeot vehicles. Fits models Citroën Xsara, Xsara Picasso, Berlingo, Peugeot 307, Partner, 206.
This Siemens BSI E03-00 comfort control unit is a central electrical module used on a range of Citroën and Peugeot models. It manages multiple body and comfort functions such as central locking, interior lighting, wipers, indicators, immobilizer interface and communication with other control units. Ideal for professional workshops and DIY mechanics who search by part numbers (BSI E03-00, 9657999880, 6580FQ), this listing provides compatible codes and practical installation guidance to simplify replacement and commissioning.
Technical Information
- Manufacturer: Siemens
- Model: Citroën Xsara; Citroën Xsara Picasso; Citroën Berlingo; Peugeot 307; Peugeot Partner; Peugeot 206
- Product Codes: 9657999880, S118085120, F 1650882680
- Other Numbers: 6580FQ, 6580EZ, 6580EY, 6580EJ, 1650882480
How The Unit Is Replaced
Typical replacement steps (may vary slightly by model): remove the glovebox or access panel on the passenger side to reach the BSI module; disconnect the vehicle battery; carefully unplug all wiring harness connectors from the BSI; unbolt the unit from its mounting bracket; install the replacement BSI, reconnect all connectors and secure the unit. After mechanical installation, the unit usually requires cloning or coding to integrate with the vehicle immobilizer and keys (see Installation And Coding – Important).
Installation Recommendations
- Always disconnect the vehicle battery before starting work and wait a few minutes to allow systems to power down.
- Label connectors and take photos before removal to ensure correct reconnection.
- Inspect connector pins and wiring for corrosion or damage; repair any issues before fitting the new unit.
- Use recommended tools and moderate torque on fasteners to avoid damage to the housing.
- Commissioning (cloning or coding) should be performed with appropriate diagnostic equipment when required.
Installation And Coding – Important
- The Unit Is Used And Is “Paired” With The Original Vehicle (VIN/PIN/Keys).
- Options To Commission:
- Cloning Data From The Old Unit (EEPROM/Flash) – After Clone The Unit Is Plug And Play.
- Virginization And Subsequent Initialization/Telecoding Via DiagBox (Or Online) + Key Programming.
- Recommended To Be Performed By A Specialist With PSA Service Equipment (DiagBox/Lexia/PP2000).
- Always Disconnect The Battery Before Removal/Installation And Follow Manufacturer Procedures To Avoid Damaging The Unit.
Why The Part Most Commonly Fails
Common failure causes include moisture ingress and corrosion (BSI modules are often mounted in areas exposed to damp conditions), electrical surges from jump-starting or poor battery connections, broken or bent connector pins, and age-related component degradation. Faults frequently present as intermittent electrical faults, malfunctioning central locking, immobilizer errors, or loss of several comfort functions simultaneously.
Practical Tips For Diagnostics
- Check fuses and battery voltage before concluding the BSI is faulty.
- Inspect for water traces and corrosion on the module and harness connectors.
- If symptoms appeared after battery replacement or jump-starting, suspect coding or immobilizer mismatches or a potential surge event.
- When possible, clone EEPROM/Flash from the original unit to avoid immobilizer and key issues.
Supplied Part Numbers And References Listed Above Are Useful For Fast Online Searches And For Matching With Workshop Parts Catalogs. Replacement Should Be Performed By Technicians Familiar With PSA Coding Procedures Or By Experienced DIY Mechanics With Access To Proper Diagnostic Tools.
