Description
Product Overview
This is a used but fully functional Airbag Electronic Control Unit (ECU) manufactured by Autoliv for the Citroen Xsara Picasso. The unit is a direct-fit replacement often sought by part number: 9652276980, 9650137080, 602327400, 6556RA. It is designed to manage the vehicle’s airbag deployment logic and crash event recording for occupant protection.
Function And Common Symptoms Of Failure
The airbag ECU coordinates deployment timing and verifies sensor inputs to trigger airbags and seatbelt pretensioners during a collision. When the unit fails or is damaged, common symptoms include:
- Airbag warning light illuminated on the dashboard
- Inoperative airbags or restraint system faults reported by diagnostic tools
- Error codes related to crash data, sensor communication, or internal faults
Causes And When To Replace
Typical causes of ECU failure are impact damage from an accident, water ingress or corrosion, electrical surges, connector damage, or internal electronic degradation over time. Replace the unit if fault codes identify ECU errors, if crash-related memory prevents normal operation, or if airbags are disabled and cannot be reset by standard diagnostics.
Replacement And Installation Guidance
Professional installation is recommended. Basic replacement steps used by experienced mechanics:
- Disconnect the vehicle battery and wait the manufacturer-recommended time to avoid accidental deployment.
- Locate and remove the instrument panel or trim as needed to access the airbag ECU mounting point.
- Carefully unplug the ECU connectors, inspect wiring and connectors for damage, and install the replacement unit.
- Perform a full diagnostic scan and clear stored crash codes if appropriate. Some vehicles require coding or calibration of the new unit using manufacturer-level tools.
- Verify system operation and that no airbag or restraint faults remain.
Because the airbag system is a critical safety component, any uncertainty should be resolved by a qualified automechanic with the correct diagnostic equipment.
Technical Information
- Manufacturer: Autoliv
- Model: Citroen Xsara Picasso
- Product Codes: 9652276980, 9650137080, 602327400, 6556RA
- Other Numbers: Not Available
Compatibility And Notes
This ECU is intended for use on Citroen Xsara Picasso vehicles and is referenced under the PSA group parts listings (Citroen and Peugeot part numbers appear in common searches). Buyers often locate this part by its product codes, so listing those numbers helps ensure correct fitment. Always confirm compatibility against your vehicle’s VIN and current part references before purchase.
If you are a professional mechanic or a competent DIYer, this Autoliv airbag ECU offers a practical replacement to restore the safety functions of the restraint system. Ensure proper diagnostics, secure installation, and any required coding to return the vehicle to full operational condition.
