Product Overview

This BSI (Built-in Systems Interface) central body control unit, reference 2004 H01-00, is a core electrical module used on certain Citroën and Peugeot models. Marked with part numbers commonly searched by mechanics—such as 9664968980, 1660728880, 6580QH and 6580QJ—this unit handles many comfort and convenience functions: central locking, lighting control, wipers, interior electronics, alarm/immobiliser interface and various comfort signals. It is suitable for professional workshops and experienced DIYers familiar with vehicle electrical systems and coding procedures.

Key Benefits

• Direct replacement for vehicles fitted with the H01-00 BSI hardware family.
• Simplifies repairs by restoring central body functions without replacing multiple components.
• Commonly referenced by part numbers, making it easy to locate in catalog searches.

How It Works And What It Controls

The BSI is the vehicle’s central comfort and body control module. It communicates with subsystems via the vehicle bus to manage functions such as central locking, interior and exterior lighting, wiper controls, electric windows, dashboard indicators, alarm/immobiliser signaling and some convenience relays. Failure of the BSI can cause multiple unrelated symptoms across vehicle comfort and electrical systems.

Typical Fitment

Origin: This unit was removed from a 2006 Peugeot 307. It is intended for use on Citroën and Peugeot models that share the same BSI hardware family (H01-00). When searching, customers often use the product codes listed below to confirm compatibility.

How To Replace

Replacement requires basic electrical skills and careful handling:

• Disconnect the negative battery terminal before any work to avoid short circuits and safeguard airbags and the module.
• Access the BSI unit—typically located behind the glovebox or under the lower dash on the passenger side, depending on model.
• Remove trim panels and mounting screws or clips to extract the unit carefully.
• Unplug all multi-pin connectors; note connector orientation and locking tabs.
• Install the replacement unit, reconnect connectors and secure mounting. Reconnect the battery only after mechanical installation is complete.
• Final step: coding/initialization as required (see Coding and Commissioning section).

Installation Recommendation

Always follow manufacturer guidelines when removing and installing the BSI. Use insulated tools near the connectors, avoid contact with airbag circuits, and protect the unit from static discharge. If wiring shows signs of corrosion or water ingress, address the root cause before fitting a replacement module.

Technical Information

• Manufacturer: Valeo / Johnson Controls
• Model: BSI 2004 H01-00
• Product Codes: 9664968980, 1660728880
• Other Numbers: 6580QH, 6580QJ, H01-00, NFP

Montáž a kódování – důležité (Installation and Coding – Important)

• The unit is used and is “paired” with the original vehicle (VIN/PIN/keys).
• Options for putting the unit into service:
  1. Cloning data from the old unit (EEPROM/Flash) – after cloning the unit is plug and play.
  2. Virginization 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 procedure to avoid damaging the unit.

Why This Part Fails

Common causes of BSI failure include water ingress and corrosion, voltage spikes or poor battery/charging system health, degraded solder joints or component failures within the unit, and thermal stress over many years. Symptoms often present as multiple, seemingly unrelated electrical faults (e.g., central locking failure combined with warning lights or non-functional interior electrics), which is typical when the BSI is malfunctioning.

Expected Lifetime

There is no fixed replacement interval. In practice, BSI units often last many years but are more likely to fail on higher-mileage or older vehicles, or after exposure to moisture and electrical transients. Regular checks of body wiring, fusebox condition and battery health can reduce risk of premature failure.

Notes For Mechanics And DIYers

Parts are frequently searched by their product numbers, so reference the product codes above when ordering or diagnosing. Because coding or cloning is typically required to restore full functionality, ensure you have access to appropriate diagnostic tools or arrange coding through a qualified service.