Description
BSI Johnson Controls 2004 H05-01 Suitable for models Citroën C4, C5 II and Peugeot 307 407
Product Overview
This Body Systems Interface (BSI) unit is a genuine Johnson Controls type used in PSA vehicles and designated 2004 H05-01. It is a central comfort and body control module that manages functions such as central locking, interior and exterior lighting, windshield wipers, power windows, alarm and immobiliser interfaces, key recognition and many other vehicle comfort and safety systems. The unit is frequently searched by part numbers like 9660105980, H05-01 and the associated reference codes listed below, so including the exact code when ordering will speed up matching and compatibility checks.
Fitment And Application
Designed to fit the following models: Citroën C4, Citroën C5 II and Peugeot 307, Peugeot 407. It is compatible with vehicles that use the 2004 H05-01 BSI architecture and the listed product codes. When replacing the BSI, confirm the part code on the original unit to ensure correct fitment.
Function And Common Symptoms
The BSI acts as the vehicle s central control hub for comfort and body electronics. Typical symptoms of a faulty BSI include intermittent or complete loss of central locking, malfunctioning interior or exterior lights, inoperative wipers, problems with power windows, erratic dashboard indicators and immobiliser or key recognition faults. Failures may be intermittent and can affect several seemingly unrelated systems at once because the BSI coordinates multiple subsystems.
Replacement Procedure
General replacement steps for a BSI unit:
- Disconnect the negative battery terminal before any work to avoid electrical damage.
- Access the BSI unit, typically located behind trim panels under the dashboard on the passenger or driver side depending on vehicle variant. Remove the necessary trim and fasteners to reach the unit.
- Carefully unplug electrical connectors and release mounting screws/clips. Mark connector positions if needed to avoid mistakes during reassembly.
- Fit the replacement BSI in reverse order, ensuring connectors are fully seated and no pins are bent.
- After mechanical fitment, the unit must be properly initialized or coded to the vehicle using appropriate diagnostic equipment as described below.
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) plus key adaptation.
– 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 damage to the unit.
Technical Information
- Manufacturer: Johnson Controls
- Model: BSI 2004 H05-01
- Product Codes: 9660105980, H05-01
- Other Numbers: 6580KH, 6580KJ, 1660728480, 6580CW, 6580QE, 6580Y5, 6580Y6, 1660729180, 1660727880, 6580AG, BOOT 21676031-5B, HARD 28113346-8A
Recommendations For Installation
- Use proper anti-static precautions and handle the unit by its housing; avoid touching pins and electronic components.
- Perform coding or cloning with DiagBox or equivalent PSA diagnostic tool to restore full functionality, including immobiliser and key recognition.
- Check ground connections and related fuses before replacing the BSI, as poor grounding or electrical faults can cause apparent BSI failures.
- Secure all connectors and ensure wiring harnesses are not pinched when refitting trim panels.
Why This Part Fails Most Often
Common causes of BSI failure include moisture ingress and corrosion, electrical surges or short circuits, damaged wiring or connectors, and solder joint fatigue on the unit s circuit board caused by thermal cycling and vibration. Faults in connected components, such as window motors or aftermarket accessories, can overload or short circuits and lead to BSI malfunction. Regular exposure to damp conditions and poor sealing under the dashboard accelerates degradation.
Additional Notes
If the vehicle exhibits multiple unrelated electrical faults, inspect connectors, fuses and wiring for damage or corrosion before replacing the BSI. Correct diagnosis and professional coding ensure the replacement unit operates reliably and restores full vehicle functions.
