Description
Airbag Control Unit CITROËN C5 II
We do not know the unit’s condition, it is fully functional, possibly requires erasing CRASH data
Do not expose
Product Overview
This used airbag control unit (SRS Module) is intended for Citroën C5 II. It manages deployment of airbags and seatbelt pretensioners, stores crash event data and communicates with other vehicle safety systems. Frequently searched by part numbers, the unit is an essential safety component for vehicle repair after collisions or when replacing a faulty SRS module.
Key Features & Benefits
- Direct replacement for vehicles using the listed part numbers — ideal for mechanics and experienced DIYers looking for a cost-effective SRS solution.
- Maintains original functionality for airbag deployment and crash data logging when properly prepared and coded.
- Compatible with diagnostic tools for clearing crash data and verification of system status.
- Helps restore vehicle safety systems after a repair or following module failure.
Compatibility
Designed for: Citroën C5 II (Second Generation). Often located and identified by the part numbers listed below; verify physical match and connector type before installation.
How Replacement Is Performed
Replacing an airbag control unit requires careful adherence to safety procedures. General steps:
- Disconnect the vehicle battery and wait the manufacturer-recommended time (commonly 10–15 minutes) to allow SRS capacitors to discharge.
- Locate the SRS control unit (location varies by model; commonly under the center console, behind the glove box or beneath a seat).
- Remove trim panels and fasteners to access the module. Unplug all electrical connectors, taking care not to damage locking tabs.
- Install the replacement unit, secure mounting bolts, reconnect connectors and reassemble trim.
- Use an appropriate diagnostic tool to check system status and, if required, erase CRASH data and perform initialization or coding so the SRS system returns to normal operation.
Installation Recommendations
- Always follow the vehicle manufacturer’s procedures. Disconnect the battery before removal and keep the battery disconnected until all work and diagnostics are complete.
- Use a quality diagnostic tool capable of reading and clearing SRS fault codes and erasing crash data. After replacement, verify all airbag-related sensors and circuits for integrity.
- Handle the module carefully; avoid exposure to strong electromagnetic fields, moisture or impact. Do not open or disassemble the unit.
- If crash data must be erased or the unit requires coding, have the operation performed by an experienced technician or with suitable diagnostic equipment to ensure safe and correct restoration of the SRS system.
Why This Part Fails Most Often
Common causes of airbag control unit failure:
- Activation During Collision: Deployment records (CRASH data) mark the unit; in many cases the unit needs data erasure or replacement after a collision.
- Water Ingress or Corrosion: Moisture reaching connectors or the module can cause malfunctions or permanent damage.
- Electrical Damage: Short circuits, battery issues or improper jump-starting can damage electronic components.
- Connector Damage Or Poor Contact: Broken pins or corroded terminals lead to communication faults with sensors and airbags.
- Age And Thermal Stress: Over time thermal cycling and vibration can degrade solder joints or internal components.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C5 II (SRS / Airbag Control Unit)
- Product Codes: 9657456680
- Other Numbers: 603481900, 6545V0, 6545V1
Safety Notice
Airbag systems are critical safety components. Incorrect handling, installation or coding can result in non-deployment or unintended deployment of restraints. If unsure, have installation and post-replacement diagnostics performed by a qualified technician with appropriate SRS diagnostic equipment.
