Description
LEAR BSI V03-00 Control Unit for Citroën C8 and Peugeot 807 First Series
Overview
This used LEAR BSI V03-00 comfort control unit is intended for early-series Citroën C8 and Peugeot 807 models. The Body Systems Interface (BSI) centralises a wide range of vehicle comfort and body functions — including lighting, central locking, wipers, window controls, interior electronics and communication with other control units — and is commonly sought by mechanics and DIY enthusiasts by its product codes (9649477480, 6580S4, 6580S5).
Key Benefits
- Direct replacement for malfunctioning body/comfort control functions on Citroën C8 and Peugeot 807 (first series).
- Often listed and searched by product/reference numbers 9649477480, 6580S4 and 6580S5 — helpful when sourcing spare modules.
- Compatible with standard PSA diagnostic and coding workflows (DiagBox/Lexia/PP2000).
Technical Information
- Manufacturer: LEAR
- Model: BSI V03-00
- Product Codes: 9649477480, 6580S4, 6580S5
- Other Numbers: NFP (as listed on some units)
Installation and Coding – Important
- The unit is used and is “paired” with the original vehicle (VIN/PIN/keys).
- Options for commissioning:
- Cloning data from the old unit (EEPROM/Flash) – after a successful clone the unit is plug-and-play.
- Virginization followed by initialization/telecoding via DiagBox (or online) + key adaptation.
- Recommended to be performed by a technician 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.
Installation Recommendations
- Disconnect the negative battery terminal and wait a few minutes before starting work to reduce risk of ECU damage.
- Remove required trim panels carefully to access the BSI — avoid levering on connectors or wiring harnesses.
- Inspect connector pins and housing for corrosion or bent pins; clean contacts if necessary before fitting the replacement.
- If cloning is chosen, use reliable EEPROM/Flash cloning tools and verify checksums; if virginizing, perform full initialization and key adaptation with PSA diagnostic tools.
- After installation, run a full systems scan with DiagBox/Lexia to confirm all linked functions and to clear fault memory.
Why This Part Commonly Fails
- Moisture Ingress And Corrosion: Water or humidity entering connectors causes poor contact and electrical faults.
- Electrical Surges And Poor Battery Changes: Voltage spikes or incorrect battery reconnection can damage internal electronics.
- Connector And Wiring Wear: Repeated disconnection, vibration and broken wires lead to intermittent faults.
- Age-Related Component Degradation: Capacitors, solder joints and internal components can fail after many years in service.
- Aftermarket Alarm/Modifications: Improper installations can overload or short signal lines tied into the BSI.
How To Replace
- Disconnect the negative battery terminal and wait at least 5–10 minutes.
- Remove any trim or panels required to access the BSI module (location depends on vehicle trim — consult repair manual).
- Unplug all connectors carefully and remove retaining screws or clips.
- Install the replacement unit, secure fastenings and reconnect connectors, ensuring firm seating and no damaged pins.
- Proceed with cloning or virginization and coding as required (see Installation and Coding – Important).
- Reconnect the battery and perform a full system check and diagnostic scan to confirm correct operation.
Compatibility Note
Fits: Citroën C8 and Peugeot 807 (first series). Common search references: 9649477480, 6580S4, 6580S5. Always compare product codes shown on the unit with the vehicle’s existing unit for best match.
Who Should Fit This Part
Recommended for professional auto electricians, independent workshops and experienced DIY mechanics familiar with PSA diagnostic tools and ECU coding. For successful restoration of full functionality the cloning or coding steps must be completed correctly.
