Description
Airbag Control Unit For Citroën C2, C3 And C3 Pluriel
High-quality Airbag Control Unit (SRS ECU) compatible with Citroën C2, Citroën C3 and Citroën C3 Pluriel. Frequently searched under part numbers 9651927580 and 654583, this unit is an essential safety module that monitors impact sensors, stores fault codes and controls deployment of airbags and seatbelt pretensioners in the event of a collision. Ideal for professional mechanics and experienced DIY enthusiasts looking for a direct-fit replacement for models in the PSA/Stellantis family.
This control unit improves the chances of correct diagnosis and fast repair when a vehicle displays SRS warning lights. Searchable by OE numbers 9651927580, 654583 and related references 654584, 654691, the module helps restore the airbag system functionality after it has been damaged in a crash or disabled by electrical faults. Compatible with common repair procedures and diagnostic tools used in independent workshops and service centers.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C2; Citroën C3; Citroën C3 Pluriel
- Product Codes: 9651927580; 654583
- Other Numbers: 654584; 654691
Installation Recommendations
Always follow safe SRS procedures during replacement. Before starting, disconnect the negative battery terminal and wait at least 10–15 minutes to allow residual charge to dissipate. Use an illuminated workshop manual or OEM wiring diagrams and a suitable diagnostic scanner to read and clear fault codes after installation. Handle airbag connectors and wiring harnesses carefully — avoid pulling on wires and ensure connectors are fully seated and locked. Mount the unit securely to the original bracket and verify ground connections. After fitting, perform a full system check with a compatible diagnostic tool to confirm the SRS system is operational and the airbag warning lamp is extinguished.
Most Common Failure Reasons
The Airbag Control Unit is not a regular wear item; failures most commonly occur as a result of external events. Primary causes include impact damage from a collision, water ingress or corrosion affecting connectors and the module housing, and electrical shorts or surge events in the vehicle electrical system. After an accident the unit may record crash data or suffer internal damage that prevents normal operation. Proper diagnosis with a scan tool will differentiate ECU faults from sensor or wiring issues.
Practical Notes For Mechanics And DIYers
When replacing the SRS ECU, confirm the part numbers (9651927580, 654583) match the vehicle reference being serviced. Clear diagnostic trouble codes only after correctly installing the unit and cycling power. If the airbag lamp remains on after replacement, inspect all airbag sensors, seatbelt pretensioners and their connectors for damage, corrosion or poor grounding. For best results use a professional-level OBD/SRS diagnostic scanner to access crash data and to reset the system.
Keywords: Airbag Control Unit, SRS ECU, Citroën C2 Airbag Unit, Citroën C3 Airbag Module, C3 Pluriel SRS, Part No. 9651927580, 654583.
