Description
BSI BSI04EV K04-00 Johnson Controls from Peugeot 407 2008.
The BSI (Built-In Systems Interface) BSI04EV K04-00 is the central comfort and body control module used in Peugeot 407 vehicles. This unit, manufactured by Johnson Controls, manages central locking, interior lighting, wipers, indicators, immobilizer communication and many other convenience and safety functions. Technically precise fit and correct product coding are essential: technicians and DIYers frequently search by product number (for example 9664059080) to find the correct replacement. Installing a correct BSI restores reliable operation of electrical and comfort systems and prevents intermittent faults that can affect vehicle starting and security.
Technical Information
- Manufacturer: Johnson Controls
- Model: Peugeot 407 (including 2008 models)
- Product Codes: BSI04EV, K04-00, 9664059080
- Additional Numbers: 01 6580SS, 657062, BOOT 28120836-4, HARD 28119248-3 C
Compatibility And Fitment
Designed for Peugeot 407 series vehicles. Match the unit by the listed product codes to ensure proper fit. The BSI location and connector layout can vary by production year and trim, so always verify the code stamped on the module against the vehicle part number before fitting.
Replacement Procedure
Basic replacement steps (overview for experienced technicians):
- Disconnect the negative battery terminal and wait a few minutes to reduce residual power in the system.
- Remove the required trim panels to access the BSI module (commonly located behind the glovebox or under the dashboard on the passenger side).
- Carefully unplug all electrical connectors from the BSI, noting connector positions and locking tabs.
- Install the new unit, reconnect connectors, reassemble trim and reconnect the battery.
- Perform coding and immobilizer synchronization with a suitable diagnostic tool—many BSI units require programming to match vehicle immobilizer data and to enable full functionality.
Installation Recommendation
- Handle the module with ESD precautions and avoid touching exposed circuit areas.
- Always disconnect the battery before starting work to prevent short circuits and data corruption.
- Use an appropriate diagnostic interface to perform module coding and immobilizer synchronization after fitment.
- Inspect wiring and connectors for corrosion or damage before installing the new BSI; unresolved wiring faults can damage a replacement unit.
- If uncertain about coding or immobilizer procedures, professional workshop equipment is recommended.
Most Common Failure Causes
BSI units commonly fail due to:
- Water ingress and corrosion from leaks or condensation, leading to short circuits or connector oxidation.
- Voltage spikes or poor battery/alternator regulation that stress onboard electronics.
- Damaged wiring or persistent electrical faults that overload the module.
- Aging and thermal stress over many years of service causing component degradation.
Typical symptoms of a failing BSI include intermittent central locking, dashboard warning lamps, non-functional interior electronics, immobilizer/key recognition faults, unusual battery drain, or random resets of comfort functions. Replacing the BSI with the correct coded unit and addressing the root electrical cause will restore reliable operation.
