Description
Airbag control unit for CITROËN C5 II. Controls 7 airbags plus pyrotechnic seatbelt pretensioners. The unit is fully functional and has not been in an accident.
This SRS (Supplemental Restraint System) control unit is a direct-fit replacement designed for Citroën C5 II vehicles. It manages deployment logic for up to seven airbags and the pyrotechnic pretensioners, ensuring coordinated activation in the event of a collision. Suitable for professional workshops and experienced DIY mechanics, the unit is often searched by its product codes, so listing all relevant numbers below improves findability.
The control unit is ideal when you see SRS warning lights, stored airbag faults or after replacing crash sensors or wiring that affect the airbag circuit. Replacing the ECU restores correct fault reporting and deployment logic when the original module is malfunctioning or has been removed.
Technical Information
- Manufacturer: Citroën / Stellantis
- Model: Citroën C5 II (Second Generation)
- Product Codes: 9659532380, 603481900
- Other Numbers: 6545V0, 6545V1, NFP
Compatibility
Intended primarily for Citroën C5 II models. The same product codes may appear across related Stellantis models; verify parts numbers when searching. Commonly referenced by the codes above, which customers and workshops use to locate the correct unit.
Installation Recommendations
- Disconnect the negative battery terminal and wait at least 10 minutes to allow capacitors to discharge before beginning work.
- Locate the airbag control unit (typically mounted under the center console or under a seat depending on the vehicle specification) and remove mounting fasteners carefully.
- Avoid static discharge and handle connectors by the housings; inspect wiring and connector pins for corrosion or damage before installation.
- Fit the replacement unit securely, reconnect connectors and battery. Clear SRS fault codes with an appropriate diagnostic tool and confirm that no residual faults remain.
- Reprogramming or coding with a diagnostic interface may be required in some vehicle configurations to fully integrate the unit into the vehicle network.
Why This Part Fails Most Often
Airbag control units are robust but can fail due to moisture ingress or corrosion at connector points, electrical surges, damaged wiring, or the effects of a previous crash. Connector damage during interior repairs and long-term exposure to damp conditions are common causes. In some cases, internal component degradation such as capacitor failure can lead to intermittent faults and SRS warning lights.
When replacing the unit, also inspect associated crash sensors, wiring harnesses and mounting points. Addressing the root cause—corrosion, wiring faults or physical damage—prevents repeated failures and ensures the airbag system remains fully operational.
Part numbers printed above are the quickest way to find the correct replacement in catalogs and search engines. For professional diagnosis and safe installation follow standard SRS procedures and use appropriate diagnostic equipment to confirm correct operation after fitment.
