Description
BSI BSI04EV K05-00 Johnson Controls for Citroën and Peugeot vehicles. It is from a Peugeot 308.
Electronic Body Control Unit (BSI) BSI04EV K05-00 manufactured by Johnson Controls, designed for use in a range of Citroën and Peugeot models. This unit is commonly referenced by product numbers such as 9666895780, 01 658059 and 1663370480. The BSI centralizes comfort and body electronics: central locking, interior lighting, indicators, wipers, electric windows, immobiliser interface and internal CAN/LIN communications. Suitable for professional garages and experienced DIY mechanics who perform electronic replacements and subsequent coding.
Technical Information
- Manufacturer: Johnson Controls
- Model: BSI04EV K05-00
- Product Codes: 9666895780, 01 658059, 1663370480, K05-00, BSI04EV
- Additional Numbers: 658059, 1663370480
- Commonly Fitted To: Peugeot 308, Citroën C4 (Compatibility Depends On Production Year And Equipment Level)
Function
The BSI (Body Control Module) is the central unit managing comfort and body functions. Typical responsibilities include:
- Central locking and key/immobiliser interface
- Interior and exterior lighting control
- Wiper and washer logic
- Power window and mirror control
- CAN/LIN communication hub for convenience modules
- Signal distribution to dashboard and safety systems
Common Failure Causes
- Moisture Intrusion And Corrosion: Water ingress or condensation can corrode connectors and printed circuits.
- Electrical Overstress: Voltage spikes, jump-starts or poor battery connection leading to damaged components.
- Poor Solder Joints / Thermal Cycling: Repeated heating and cooling may cause cracked solder joints on the board.
- Connector Wear Or Broken Pins: Loose or damaged multi-pin plugs causing intermittent faults.
- Software/Configuration Errors After Replacement: Unit may need cloning or reinitialization to match vehicle configuration.
Replacement And Installation
Typical replacement steps for experienced technicians or competent DIYers:
- Prepare: Park vehicle on level surface, engage parking brake and remove ignition key.
- Disconnect Battery: Always disconnect the negative battery terminal before work on the BSI.
- Access Unit: BSI Units Are Typically Located Behind The Glovebox Or Under The Dashboard; Remove Trim Panels As Required.
- Document Connections: Photograph and label connectors and harnesses before unplugging to ensure correct reassembly.
- Remove Fasteners: Unbolt the unit carefully and withdraw it, avoiding stress on wiring.
- Install Replacement: Fit new unit, secure fasteners and reconnect connectors firmly. Ensure harnesses are properly seated and locked.
- Coding And Initialization: BSI Units Almost Always Require Cloning Or Coding To The Vehicle’s Configuration (See Below).
- Reconnect Battery: Reconnect battery last and follow vehicle-specific start-up procedure.
Installation Recommendations
- Use Proper Tools: Use service-quality tools to avoid damage to delicate connectors and fasteners.
- Check Ground And Power Supply: Verify fuses, main relays and battery voltage before and after installation.
- Protect Against Moisture: Ensure the unit and its mounting area are dry and seals are intact to prevent future ingress.
- Follow Manufacturer Torque And Removal Procedures: Avoid over-tightening screws or stressing the unit.
- Retain Original Data When Possible: If available, clone EEPROM/Flash to maintain vehicle-specific settings and immobiliser data.
Installation And Coding – Important
- The Unit Is Used And Is Paired With The Original Vehicle (VIN/PIN/Keys).
- Options To Commission The Unit:
- 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.
- It Is Recommended To Be Performed By A Specialist With PSA Service Equipment (DiagBox/Lexia/PP2000).
- Before Removal/Installation Always Disconnect The Battery And Follow Manufacturer Procedures To Avoid Damaging The Unit.
How Often It Fails
Failure Frequency Varies Widely Depending On Use And Environment. Commonly Reported Issues Appear After Several Years (Often Around 8–15 Years) Or After Exposure To Moisture And Electrical Events. Proactive Checks Of Connectors, Fuses And Battery Health Can Reduce Risk Of Early Failure.
Why This Part Adds Value
Replacing a faulty BSI with the correct model and product codes restores central comfort functions and communication stability across vehicle networks. For garages this means fewer diagnostic hours and for DIY customers a return of normal vehicle operation when installed and coded correctly.
