Description
Airbag Control Unit for Citroën C5 II — 7x Airbags Plus Pyrotechnic Seatbelt Pretensioners. We do not know the unit’s condition; it is fully functional, may require clearing CRASH data.
This airbag (SRS) control unit is intended for Citroën C5 II vehicles and controls deployment of seven airbags together with the pyrotechnic seatbelt pretensioners. The unit stores crash events and fault codes and communicates with other vehicle safety systems. Commonly searched by part numbers 9659532380, 603481900, 6545V0 and 6545V1, it is a direct-fit replacement option for mechanics and experienced DIY enthusiasts working on PSA/Stellantis vehicles.
Key Benefits
Designed to restore SRS functionality after an accident or unit failure, this control unit ensures proper coordination of airbags and pretensioners during a collision. It is suitable for professional repairs and garage replacements where restoring occupant protection is required. Clear identification by product codes makes it easy to find the correct unit for the repair job.
How It Works
The unit continuously monitors sensors (impact, lateral, longitudinal, and occupancy) and deploys the appropriate airbags and belt pretensioners in milliseconds when a qualifying event occurs. It also logs crash data and post-impact status in non-volatile memory, which is used by technicians during diagnosis and repair.
Installation Overview
Replacement should follow these general steps: disconnect the negative battery terminal and wait at least 10 minutes to allow SRS capacitors to discharge; remove interior trim to access the airbag control module (location typically under the center console or under the front passenger seat depending on vehicle specification); unbolt the unit, carefully unplug connectors and replace with the new unit; reconnect all connectors and reassemble interior trim. After installation, read and clear SRS fault codes and, where necessary, clear CRASH memory with a compatible diagnostic tool. Verify full system integrity and perform an SRS system scan before returning the vehicle to service.
Installation Recommendations
Always Follow Manufacturer Procedures. Work Should Be Performed By A Qualified Technician If You Are Not Experienced With SRS Systems. Disconnect The Battery Before Any Work And Observe Anti-Static/ESD Precautions. Use A Compatible Diagnostic Tool To Read/Reset Faults And Clear Crash Data. Replace Any Deployed Airbags Or Pretensioners; Do Not Reuse Components That Have Been Activated.
Most Common Failure Causes
Airbag control units typically fail or require replacement after a collision where deployment has occurred (the unit stores CRASH memory). Other frequent causes are water ingress/corrosion, connector damage, previous improper handling or electrical surges, and internal electronic faults. In many cases the unit itself is intact but CRASH memory must be cleared before the vehicle will show a ready SRS status.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C5 II (Second Generation)
- Product Codes: 9659532380, 603481900, 6545V0, 6545V1
- Additional Numbers: 603 48 19 00
Notes For Mechanics And DIYers
Part Numbers Are Critical — Always Match The Product Codes Listed Above To The Unit Being Replaced. After Any Airbag System Repair, Perform A Full Diagnostic Scan To Ensure No Residual Faults Remain. If CRASH Memory Is Present, Use A Compatible PSA Diagnostic Tool To Clear It And Verify System Readiness.
