Description
Airbag Control Unit AUTOLIV for CITROËN Xsara Picasso. Fully functional.
Product Overview
This used Airbag Control Unit (Airbag ECU) manufactured by Autoliv is intended for Citroën Xsara Picasso vehicles. The unit monitors crash sensors and controls deployment of airbags and seatbelt pretensioners. Ideal for workshops and experienced DIY mechanics looking to replace a faulty or crash-damaged airbag controller. Commonly searched by OE numbers such as 9650137080 and 602327400 — include these codes when searching to improve compatibility match.
Function and Symptoms
- Primary Function: Continuously monitors impact sensors, evaluates crash severity and triggers airbags/pretensioners when required. Stores fault codes related to the airbag system.
- Common Symptoms of a Faulty Unit: Persistent airbag warning light on the dashboard, stored crash or communication errors in fault memory, intermittent faults that clear and return, or total lack of communication with diagnostic tools.
- After a Deployment: Units that have recorded an airbag deployment may store crash data and often require replacement rather than simple reset.
Fitment
Fits: Citroën Xsara Picasso (models equipped with Autoliv airbag systems). Check the OE/product codes listed below to confirm mechanical and electrical compatibility with the vehicle’s harness and connector layout.
Technical Information
- Manufacturer: Autoliv
- Model: Citroën Xsara Picasso
- Product Codes: 602327400, 9650137080
- Other Numbers: 6556RA, NFP, (N68)
Installation Recommendations
- Always disconnect the vehicle battery and wait the manufacturer-recommended time before starting to work on the airbag system to avoid accidental deployment.
- Locate the unit (typically under the center console or beneath the passenger/dash area depending on model year) and carefully disconnect all electrical connectors. Take photos of connector positions to aid reassembly.
- Remove mounting fasteners and install the replacement unit in the original orientation. Ensure connectors are clean, dry and fully engaged.
- After installation, clear stored fault codes with a suitable diagnostic tool and verify system readiness. If the airbag light remains on, inspect wiring, sensors and grounding points before replacing the unit again.
- Replacement and any required initialization should be carried out by a qualified technician if you are not experienced with restraint systems — incorrect handling can be dangerous.
Why This Part Most Commonly Fails
- Collision Damage: Impact events can trigger deployment or damage internal circuitry, leaving the unit nonfunctional or storing unrecoverable crash data.
- Water Ingress and Corrosion: Moisture reaching connectors or the unit body can cause corrosion, short circuits or intermittent faults.
- Electrical Surges or Poor Grounding: Voltage spikes, jump-starting errors or bad grounds may damage the ECU electronics.
- Connector/Wiring Damage: Physical wear, rodent damage or poor repairs can break signal lines between sensors and the control unit.
Notes for Mechanics and DIYers
When sourcing a replacement, match OE/product codes (602327400, 9650137080, 6556RA) to ensure connector and functionality compatibility. Treat airbag ECUs as safety-critical components: follow service manual instructions and safety precautions strictly. This unit is supplied as described: fully functional.
