Description
BSI E01-00 HG Siemens for Citroën and Peugeot vehicles.
Product Overview
This BSI E01-00 HG Siemens comfort/control unit is a central body computer used on a range of Citroën and Peugeot models. It manages vehicle comfort and convenience functions such as central locking, interior lighting, wipers, indicators, door mirrors, alarm, and various driver interfaces. The unit is commonly searched by part numbers (9649627780, S118085320A) and is a direct-fit replacement for vehicles equipped with the E01-00 hardware variant.
Key Benefits
- Comprehensive Control: Consolidates multiple body functions into a single module for easier diagnostics and repair.
- OE Cross-Reference: Supplied with familiar OEM codes used by technicians and parts lookups.
- Suitable For Professionals And Experienced DIYers: Clear fitment and coding options make it practical for workshop installation when proper tools are available.
Technical Information
- Manufacturer: Siemens
- Model: BSI E01-00 HG
- Product Codes: 9649627780, S118085320A
- Additional Numbers: 1650882380, 6580H2, 6580FP, 6580GT, NFP
- Common Applications: Citroën Berlingo, Citroën Xsara Picasso, Peugeot 206, Peugeot Partner
Function And What It Controls
The BSI (Body Systems Interface) acts as the gateway for comfort and body electronics. Typical functions include central locking and remote key recognition, interior and exterior lighting logic, wiper and washer control, status monitoring of doors and boot, alarm and immobilizer interface, and communication with engine and transmission control units over the vehicle network.
How To Replace The Unit
Replacement should be carried out by a trained technician or an experienced DIYer comfortable with vehicle electronic systems. Typical steps:
- Disconnect The Battery: Always isolate the battery before any work to avoid damage or data loss.
- Locate The BSI: The BSI is located in the passenger compartment (commonly behind the dashboard, under the glovebox or beneath the steering column depending on the model).
- Remove Trim And Fasteners: Carefully remove surrounding trim panels and any mounting screws or brackets.
- Label And Disconnect Connectors: Mark each connector before unplugging to ensure correct reassembly.
- Swap Unit And Reassemble: Install the replacement unit, reconnect connectors, refit trims and fasteners.
- Coding/Initialization: Follow the coding options below to make the unit operational in the vehicle.
Installation And Coding – Important
- The Unit Is Used And Is “Paired” With The Original Vehicle (VIN/PIN/Keys).
- Options To Make The Unit Operational:
- 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 Removal/Installation Always Disconnect The Battery And Follow Manufacturer Procedure To Avoid Damage To The Unit.
Why The Part Fails
BSI units are robust but can fail for several common reasons: water ingress and moisture causing corrosion, cracked solder joints due to thermal cycling, connector corrosion, power surges from battery jump-starts or faulty alternators, and damaged traces or components from previous poor repairs. Failure symptoms typically include intermittent or permanent loss of central locking, malfunctioning lights or wipers, nonresponsive switches, key recognition faults, and communication errors on diagnostic tools.
Maintenance And Diagnostic Tips
- Check For Moisture And Corrosion: Inspect connectors and the unit housing during removal.
- Verify Power And Ground: Many faults are caused by poor battery connections or blown fuses—confirm correct supply before replacing the BSI.
- Use Proper Diagnostic Tools: Use DiagBox/PP2000 or equivalent to read fault codes and confirm network communication before deciding on replacement.
- Consider Cloning Where Possible: Cloning EEPROM/Flash preserves vehicle-specific data and simplifies commissioning.
Fitment And Searchability
Common search terms: BSI E01-00, Siemens BSI, 9649627780, S118085320A, Citroën BSI, Peugeot BSI, BSI coding, BSI replacement module. Use these codes when searching parts catalogues or ordering to ensure correct fitment.
Recommendation
This BSI unit is suitable for workshops and experienced home mechanics familiar with vehicle electrics and PSA coding procedures. For correct commissioning and to avoid immobilizer or key issues, plan for cloning or professional initialization when installing this unit.
