Original used comfort control unit Siemens BSI F03-00 BG for Citroën C2, C3 and C3 Pluriel. It is a Body Systems Interface (BSI) unit that controls the comfort and body functions of the car and is key to the communication of the multiplex network in the car. Suitable as a replacement for a defective BSI – especially for cars of the 1st generation C2/C3, where the new part is already NFP (not supplied).

Key identification and OEM numbers
– Manufacturer/type: Siemens/VDO – BSI F03-00 BG
– PSA/OEM: 9649811580, 1650881980 (1650881980 = NFP)
– Siemens number: S118085100 H
– Written on the unit label: always compare the whole designation, especially F03-00 BG and S118085100H

Compatibility
– Citroën C2 (approx. 2003–2009)
– Citroën C3 I (approx. 2002–2009)
– Citroën C3 Pluriel (approx. 2003–2010)
Note: Compatibility may vary by trim level and year of manufacture. Before ordering, please compare the BSI label and part numbers with your original piece or check against the VIN.

What the BSI controls and the typical symptoms of the defect
– Functions: central locking, direction indicators and lighting, wipers and washers, on-board network, communication with the instrument panel, immobilizer, comfort functions.
– Manifestations of defective BSI: spontaneous switching of wipers/lights, central failure, problems with diagnostics communication, random errors of comfort elements, battery discharge, engine not starting (IMMO).

Technical information
– Network: multiplex VAN/CAN depending on the vehicle equipment
– Location: interior – fuse box under dashboard (driver’s side)
– Design: integrated relays and fuses, multiple connectors
– Index: F03-00 BG (important for HW/SW compliance)

Assembly and coding – important
– BSI is paired with the car (VIN, immobilizer, equipment configuration). After replacement, adaptation is necessary.
– Options:
– Clone data from the original drive (EEPROM/flash transfer) – recommended if the old BSI is readable.
– Coding “to virgin” and subsequent pairing with PSA diagnostics (Lexia/PP2000/DiagBox).
– Without proper adjustment, the car usually won’t start. We recommend assembly and programming by an experienced car electrician/PSA diagnostician.

Why choose this part?
– Genuine PSA/Siemens part – correct compatibility and quality
– Replacement for numbers 9649811580 and 1650881980 (the new part is already NFP)
– Ideal solution for fixing frequent BSI glitches on C2/C3/C3 Pluriel

Search and Verification Tip
– Search and compare by: “BSI F03-00 BG”, “S118085100H”, “9649811580”, “1650881980”, “Citroën C3 BSI”, “Citroën C2 BSI”.
– Always check that the label and connectors match your original part before ordering.

This is an original used car part. The condition and design corresponds to the photos and markings on the label. For problem-free installation, we recommend professional coding and check compatibility in advance according to VIN and part numbers.