Description
BSI Control Unit 2004 H02-01 JOHNSON CONTROLS for Citroën and Peugeot vehicles BOOT 21676031-5B HARD 28117431-0A
This used BSI (Built-In Systems Interface) 2004 H02-01 from Johnson Controls is a direct-fit comfort and body electronics module for selected Citroën and Peugeot models. Frequently referenced by part numbers such as 9661940180 and 6580CW, this unit manages central locking, interior lighting, wipers, indicator logic, onboard diagnostics communication and interfaces with the vehicle immobiliser. Ideal for professional workshops and experienced DIY mechanics searching by product code, the module restores proper body control functions when the original unit is faulty.
Function and Typical Symptoms
The BSI is the vehicle’s central comfort and body control unit. It coordinates signals between switches, sensors and actuators for convenience features: central locking, interior and exterior lighting logic, wiper park and intermittent control, turn signals, dashboard warnings and some CAN-bus communications. Faulty BSI behaviour can present as intermittent or permanent loss of central locking, non-functioning interior lights, erratic indicator/wiper operation, ignition or start problems related to immobiliser recognition, or recurring electrical faults and error codes on the instrument cluster.
How It Is Replaced
Replacement requires careful handling of vehicle electronics. Typical procedure:
- Disconnect the negative battery terminal before starting to avoid short circuits or damage to electronic modules.
- Remove lower dashboard trim panels to access the BSI housing (location depends on model, commonly located under the dashboard on the passenger side or behind glovebox).
- Unplug multi-pin connectors and unscrew the unit from its mounting bracket.
- Install the replacement unit, secure fasteners and reconnect connectors ensuring correct seating.
- Perform coding/initialisation as required (see Installation and Coding section below).
Technical Information
- Manufacturer: Johnson Controls
- Model: BSI 2004 H02-01
- Product Codes: 9661940180, 6580CW, 1660728780, 6580GK, 6580GK (alternate spacing), 6580PV, 6580PW
- Additional Numbers: BOOT 21676031-5B, HARD 28117431-0A
Installation and Coding – Important
– The unit is used and paired with the original vehicle (VIN/PIN/keys).
– Options for enabling the unit:
1) Cloning data from the old unit (EEPROM/Flash) – after cloning the unit is plug and play.
2) Virginisation and subsequent initialisation/telecoding via DiagBox (or online) + key adaptation.
– Recommended to be performed by a qualified technician 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.
Recommendation For Installation
Have access to diagnostic tools capable of reading and clearing fault codes and performing BSI coding. If cloning is used, ensure a verified dump of EEPROM/Flash is available. Maintain anti-static precautions and avoid exposing connectors or the unit to moisture. After replacement and coding, perform a full functional check of central locking, lighting, wipers, instrument warnings and immobiliser behaviour.
Most Common Reasons For Failure
BSI units commonly fail due to water ingress or moisture exposure, corrosion of connector pins, electrical surges or poor vehicle earths, and fatigue of internal solder joints or electronic components over time. Symptoms often appear intermittently before permanent failure, so early diagnosis and repair or replacement can prevent secondary electrical issues.
Part commonly referenced for Peugeot 307 and other compatible Citroën/Peugeot models. Search by part number (for example 9661940180) for fastest match when sourcing the correct unit.
