Description
BSI control unit Johnson Controls for Citroën and Peugeot vehicles.
This BSI (Body System Interface) unit is a direct-match electrical control module commonly referenced by part numbers 9664059180 / 966405918001 and K05-00. Intended for professional garages and experienced DIY mechanics working on Citroën and Peugeot vehicles, this unit manages central comfort and security functions and is often searched for by its OEM codes (e.g. 9664059180). Clear listing of original codes makes fast identification and ordering simple when replacing a faulty comfort module.
Technical Information
- Manufacturer: Johnson Controls
- Model: BSI04EV K05-00
- Product Codes: 9664059180, 966405918001, K05-00
- Other Numbers: 6580RN, 6580RP, 1663372780, 28119249-6D, 28120836-4
Compatibility
Common fitment includes Citroën C4 and Peugeot 308 (verify exact code match before installation). Always compare the unit’s printed or stamped numbers with the vehicle’s existing module to ensure compatibility.
Function
The BSI (Body System Interface) coordinates multiple comfort and convenience systems: central locking, interior and exterior lighting logic, wiper control, interior electronics power distribution, key recognition/immobiliser interface and communication with other CAN-bus modules. A correctly programmed BSI ensures proper behaviour of remote locking, alarm, interior lights, and certain comfort functions.
Installation
General replacement steps: disconnect the negative battery terminal, remove the trim panels to access the BSI, unplug wiring harness connectors, unbolt the unit and swap with the replacement. Reconnect connectors securely, refit trim and reconnect the battery. After mechanical replacement, the unit usually requires cloning or coding to match the vehicle’s immobiliser and keys (see coding section).
Installation And Coding – Important
- The unit is used and is “paired” to 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.
- Virginisation and subsequent initialization/telecoding via DiagBox (or online) + 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 the manufacturer’s procedures to avoid damaging the unit.
Recommendations For Installation
Work should be carried out with basic diagnostic capability and an oscilloscope or multimeter to verify power and CAN-bus signals where possible. Protect connectors from contamination, ensure all pins are straight and clean before reconnection, and avoid switching the battery on while connectors are unplugged. If you are cloning or coding, use official PSA tools (DiagBox/Lexia) or a qualified service to perform EEPROM/flash operations.
Why The Part Fails Most Often
- Water ingress or moisture leading to corrosion of connectors or internal electronics.
- Electrical surges or poor battery jump-starts causing internal component failure.
- Connector corrosion or broken solder joints from vibration and age.
- Software corruption after improper battery disconnection or failed coding attempts.
Technical buyers: check all listed OEM numbers (9664059180, 966405918001, K05-00) against the unit being replaced. Matching product and other reference numbers ensures correct fit and reduces rework. This listing includes the common reference and additional factory numbers to help identify the correct BSI for your Citroën or Peugeot.
