Description
Intelligent BSI 2004 H04-01 unit by Johnson Controls for Citroën and Peugeot vehicles.
This original BSI comfort module (BSI 2004 H04-01) is a direct replacement for vehicles equipped with the listed part numbers and provides reliable central body electronics control for lighting, central locking, wipers, interior electronics and immobiliser-related functions. Ideal for professional workshops and experienced DIY mechanics, the unit supports fast diagnosis and restoration of vehicle convenience systems while carrying original Stellantis/PSA identifiers (9660105880 / 6580KH / 6580KJ / 1660728480).
The BSI (Body System Interface) is the central comfort and body electronics module that coordinates signals between switches, sensors and actuators across the vehicle. It manages functions such as central locking, interior lighting, wiper/washer logic, indicator lights, alarm and immobiliser interfaces, and communicates with other control units on the CAN network. Replacing a faulty BSI restores correct behavior of these systems and removes erratic electrical faults caused by a defective module.
How To Replace
Removal and installation typically require removing interior trim panels to access the fusebox area where the BSI is mounted (location may vary by model and year). Basic replacement steps:
- Park on level ground, switch off ignition, and remove the key.
- Always disconnect the negative battery terminal before starting work to avoid electrical damage.
- Remove required trim panels or glovebox to access the BSI unit and its connectors.
- Unplug electrical connectors, unbolt the unit and fit the new BSI in reverse order.
- After physical replacement, perform cloning or coding as required (see Installation and Coding – Important).
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 Carried Out By A Specialist With PSA Service Equipment (DiagBox/Lexia/PP2000).
- Always Disconnect The Battery Before Removal/Installation And Follow The Manufacturer’S Procedure To Avoid Damaging The Unit.
Technical Information
- Manufacturer: Johnson Controls
- Model: BSI 2004 H04-01
- Product Codes: 9660105880, 6580KH, 6580KJ
- Additional Numbers: 1660728480, H04-01
Recommended For
Common Fitment: Citroën C5. Also used on various Citroën and Peugeot models from the same generation equipped with the BSI 2004 H04-01 unit and matching product codes listed above. Suitable for mechanics and experienced DIYers familiar with vehicle electronics and coding procedures.
Installation Recommendations
Have the unit cloned or coded by a technician with PSA diagnostic tools to ensure full functionality (cloning preferred when possible to preserve vehicle-specific data). Use appropriate ESD precautions when handling the module and always disconnect the battery before working. Inspect connectors and wiring for corrosion or damage and replace any brittle wiring or worn terminals to prevent repeat failures.
Most Common Reasons For Failure
- Corrosion And Moisture Ingress Leading To Faulty Connections Or Board Damage.
- Voltage Spikes Or Incorrect Battery Disconnection During Programming Causing Memory Or Component Failure.
- Worn Solder Joints And Component Fatigue Over Time, Especially On Older Units.
- Damaged Connectors Or Wiring Harness Issues Causing Intermittent Faults.
Buying a correct BSI with matching part numbers reduces installation time. If you are replacing the unit yourself, prepare diagnostic equipment or arrange professional coding to restore plug-and-play operation and avoid immobiliser or key recognition problems.
