Description
LEAR BSI V03-00 Control Unit for Citroën C8 and Peugeot 807 (First Series)
Product Overview
This LEAR BSI V03-00 comfort control unit is intended for first‑generation Citroën C8 and Peugeot 807 models. The Body Systems Interface (BSI) centralizes and controls multiple vehicle functions — lighting, wipers, central locking, interior comfort systems, remote key recognition and some immobiliser/communication tasks — making it a critical module for daily vehicle operation. Commonly referenced by part numbers 1400010480, 6580S4 and 6580S5, this unit is often searched by code when sourcing replacements or spares.
Fitment And Function
Compatible With: Citroën C8 (first series), Peugeot 807 (first series). The BSI acts as the central comfort and body control unit, exchanging data with engine ECUs, gateway modules and the immobiliser system. On replacement it must be either cloned or reinitialized and coded to match the vehicle to restore all functions such as key recognition, central locking and alarm.
Technical Information
- Manufacturer: LEAR
- Model: BSI V03-00
- Product Codes: 1400010480, 6580S4, 6580S5, V03-00
- Additional Numbers: NFP
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 becomes plug and play.
- Virginization And Subsequent Initialization/Telecoding Via DiagBox (Or Online) + Key Adaptation.
- Recommended To Be Performed By A Technician With PSA Service Equipment (DiagBox/Lexia/PP2000).
- Before Removal/Installation Always Disconnect The Battery And Follow Manufacturer Procedures To Avoid Damaging The Unit.
How Replacement Is Carried Out
Replacement typically requires removal of lower dashboard trim under the steering column to access the BSI. After disconnecting the battery, unplug all connectors, unbolt the unit and remove it. If cloning is chosen, the donor and original unit must be connected to a compatible cloning tool to transfer EEPROM/flash data. If reinitializing, the blank unit must be programmed and telecoded with DiagBox or equivalent PSA diagnostic software, then keys adapted as needed.
Installation Recommendations
- Always Disconnect The Battery Before Starting Work To Prevent Short Circuits And Data Corruption.
- Avoid Touching Electronic Contacts With Bare Hands; Use ESD Precautions Where Possible.
- If You Lack PSA Diagnostic Tools, Use A Specialist Workshop For Coding/Key Adaptation.
- Check Connector Pins And Harness For Corrosion Or Damage Before Reinstallation.
- After Installation Verify All Comfort Functions, Central Locking, Lights And Key Recognition Work Correctly.
Why This Part Commonly Fails
BSI failures are most often caused by environmental and electrical issues rather than mechanical wear. Typical causes include water ingress and condensation (from leaking windscreen seals or HVAC paths), corrosion on connector pins, cracked or dry solder joints on the PCB, voltage spikes from jump‑starts or faulty charging circuits, and internal capacitor degradation over time. Symptoms include intermittent or total loss of central locking, non‑working wipers or lights, key recognition problems and communication errors with other ECUs.
Buyer Notes
This unit is commonly sought by mechanics and DIY enthusiasts by its product codes (1400010480, 6580S4, 6580S5, V03-00). Ensure you are prepared for cloning or coding steps after physical replacement — without proper commissioning some vehicle functions may remain unavailable.
