Description
Intelligent BSI Unit 2004 H04-01 Johnson Controls for Citroën and Peugeot Vehicles
High-quality BSI (Body Systems Interface) comfort unit designed for Citroën and Peugeot cars. This BSI 2004 H04-01 by Johnson Controls is commonly referenced under part numbers 9660105880, 6580KH, 6580KJ and 1660728480. The module centrally manages doors, lighting, wipers, central locking, interior electronics and communicates with other control units over the vehicle CAN bus. Ideal for professional workshops and skilled DIY mechanics seeking a direct replacement part identified by product code.
Technical Information
- Manufacturer: Johnson Controls
- Model: BSI 2004 H04-01
- Product Codes: 9660105880, 6580KH, 6580KJ
- Additional Numbers: 1660728480
- Fits Models: Citroën C5 and other Citroën/Peugeot vehicles equipped with BSI 2004 H04-01 (verify compatibility by comparing product codes)
Function And Benefits
The BSI (Body Systems Interface) is the central comfort and body electronics unit. It controls functions such as central locking, interior and exterior lighting, intermittent wipers, power windows, alarm and immobilizer interface, courtesy lights, and acts as a gateway for communications between body modules and the engine/ABS units. Replacing a faulty BSI restores correct operation of these systems and resolves intermittent electrical faults, false warnings, or loss of convenience functions.
How Replacement Is Performed
Replacing the BSI is a task for trained technicians or experienced DIYers comfortable with vehicle electrics. Typical steps:
- Disconnect the negative battery terminal and wait a few minutes to ensure systems are fully powered down.
- Remove the lower dashboard trim panels or glovebox to gain access to the BSI (location varies by model; commonly behind the fuse box or under the steering column).
- Unplug electrical connectors carefully, release retaining clips and unbolt the unit.
- Install the replacement BSI, secure bolts, reconnect connectors and reassemble trim.
- Perform initialization/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:
1) Clone data from the old unit (EEPROM/Flash) – after cloning the unit is plug and play.
2) Virginize and then initialize/telecode 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 procedure to avoid damaging the unit.
Common Causes Of Failure
- Moisture ingress and corrosion leading to degraded connectors or circuit traces.
- Thermal stress and cracked solder joints on the PCB, especially after many heat cycles.
- Electrical surges, poor battery/alternator voltage regulation or jump-start incidents.
- Connector damage from rough removal or rodent-related wiring damage in some vehicles.
Symptoms Of A Faulty BSI
- Intermittent or permanent loss of central locking, lights or wipers.
- Multiple unrelated warning lights or erratic behavior of convenience features.
- Failure to recognize keys or immobilizer-related start problems.
- Functions working intermittently and often returning after a vehicle restart.
Recommendations For Installation
- Always disconnect the negative battery terminal before starting work.
- Work in a dry, clean environment to avoid contaminating connectors or the PCB.
- Use the correct diagnostic and coding tools to ensure full functionality after replacement.
- When possible, clone EEPROM/Flash from the original unit to minimize coding and key adaptation steps.
- If unsure about coding or immobilizer procedures, have the final commissioning performed by a PSA specialist.
Why Choose This Unit
This BSI 2004 H04-01 is a direct-match solution when your vehicle shows convenience-electrical faults linked to the body computer. Listing common PSA product codes in the description increases the chance that mechanics and DIY customers searching by part number (9660105880, 6580KH, 6580KJ, 1660728480) will find the correct replacement quickly.
Notes
All technical information above is provided to help with selection and installation. Compare the product codes listed in this description with the unit in the vehicle before purchase to ensure compatibility.
