Description
Airbag Control Unit AUTOLIV For Citroën Xsara Picasso
This Autoliv airbag (SRS) control unit is designed for Citroën Xsara Picasso vehicles and is commonly referenced by OE numbers 9652276980, 9650137080, 602327400 and internal code 6556RA. The unit monitors crash sensors and triggers restraint systems (airbags and seatbelt pretensioners) to protect occupants in the event of a collision. Ideal for professional workshops and experienced DIY mechanics looking for a direct-replacement airbag ECU for the Xsara Picasso range.
Technical Information
- Manufacturer: Autoliv
- Model: Citroën Xsara Picasso
- Product Codes: 9652276980, 9650137080, 602327400
- Additional Numbers: 6556RA
Function And Application
The airbag control unit continuously evaluates input from accelerometers, impact sensors and seatbelt buckle sensors. When a collision exceeds predefined thresholds the module deploys airbags and pretensioners, logs crash event data and illuminates the SRS warning lamp if a fault is present. This unit is manufactured by Autoliv for fitment to Citroën Xsara Picasso models equipped with the corresponding restraint system.
Replacement Frequency And Typical Fault Origins
Airbag ECUs are typically replaced after an airbag deployment. Other common failure causes include water ingress and corrosion, electrical surges, damaged connectors or wiring after an accident, and age-related component failure. A persistent SRS warning lamp or recorded crash data are clear indicators that the unit requires attention or replacement.
Installation Recommendations
- Always disconnect the vehicle battery before starting work and follow manufacturer safety procedures. Wait a minimum of 10 minutes after disconnecting to allow system capacitors to discharge.
- Handle the unit and SRS connectors carefully; avoid static discharge and mechanical shocks to the ECU.
- Inspect connector pins and wiring for corrosion or damage; replace or repair wiring as required to ensure reliable operation.
- After installation, use an appropriate diagnostic tool to read and clear SRS fault codes and to confirm that the airbag lamp extinguishes and the system is fully functional.
Replacement Procedure (Overview)
1) Ensure vehicle is parked, ignition off and battery negative terminal disconnected. Wait at least 10 minutes.
2) Locate the airbag control unit (location varies by vehicle variant; commonly mounted inside the passenger compartment under the center console, under a front seat or beneath the passenger-side dash). Consult the vehicle repair manual for exact location and removal steps.
3) Carefully unplug SRS connectors using the correct release tools; note connector orientation and locking mechanisms.
4) Remove mounting fasteners and extract the unit. Fit the replacement unit, secure fasteners to the specified torque and reconnect connectors firmly.
5) Reconnect the battery, run a full SRS system scan with a diagnostic tool and clear any crash data or fault codes as permitted by local regulations and workshop procedures. Verify the SRS warning lamp behavior and perform a final system check.
Why This Part Is Most Often Replaced
Primary reasons include: airbag deployment in a collision (module stores crash event data and normally must be replaced), moisture or water damage causing internal corrosion, electrical problems such as short circuits or voltage spikes, and physical damage to connectors or mounting points after an impact. Regular inspection after any accident is essential.
Part numbers and OE references are commonly used when searching for a replacement, so listing codes 9652276980, 9650137080, 602327400 and 6556RA ensures easier identification and faster sourcing for mechanics and experienced DIY customers.
