Description
Autoliv Airbag Control Unit for Peugeot 407
Restore the supplemental restraint system function with this genuine Autoliv airbag control unit for the Peugeot 407. Designed as a direct replacement part, this unit carries the common OEM references used in technical searches (9655880880, 603554600, 6545HY, 6545HZ), making it easy for mechanics and DIY technicians to identify and match. Installing a correctly functioning airbag control module is essential to ensure airbags, seatbelt pretensioners and related safety systems deploy reliably in the event of a collision.
Technical Information
- Manufacturer: Autoliv
- Model: Peugeot 407
- Product Codes: 9655880880, 603554600
- Additional Numbers: 6545HY, 6545HZ
Function and Application
The airbag control unit (SRS/airbag ECU) monitors crash sensors and controls deployment of airbags and seatbelt pretensioners. It continuously processes inputs from accelerometers, impact sensors and seat occupancy sensors to decide when to trigger restraint devices. This unit is intended for use on Peugeot 407 vehicles equipped with the corresponding SRS configuration and matching part numbers.
Common Causes Of Failure
- Activation in a Previous Accident: Modules that have recorded a deployment event will show crash data and must be replaced or properly reprogrammed.
- Water Ingress or Corrosion: Moisture or corrosion at connector pins can cause intermittent faults or permanent failure.
- Electrical Disturbances: Voltage spikes, poor grounding or battery disconnects performed incorrectly can damage internal electronics.
- Connector Damage Or Wiring Faults: Physical damage to harnesses or short circuits can produce SRS errors.
Replacement Procedure (Overview)
Recommended for professional technicians and experienced DIYers with the appropriate tools.
- Read Fault Codes: Use an SRS-capable diagnostic tool to read stored crash and fault codes before removal.
- Power Down Safely: Disconnect the negative battery terminal and wait at least 10 minutes to allow SRS capacitors to discharge.
- Access Unit: Remove necessary trim and fasteners to reach the airbag control unit securely mounted in the vehicle.
- Disconnect Connectors: Carefully release the SRS connectors, inspect pins for corrosion or damage, and unplug the module.
- Swap Unit: Unbolt the old unit and fit the replacement, securing it with the original fasteners and torque where specified by the vehicle manufacturer.
- Reprogram/Clear Codes: After installation, use a compatible diagnostic tool to clear residual crash data and verify the SRS system status. Some units require cloning or initialization to match vehicle configuration.
- Verify System: Reconnect the battery, start the vehicle, and confirm that the SRS warning lamp extinguishes after the system self-check. If faults persist, re-scan and address related wiring or sensor issues.
Installation Recommendations
- Always disconnect the battery and follow manufacturer safety procedures to prevent accidental deployment and damage to the unit.
- Inspect connectors and wiring harness for corrosion or damage; repair as needed before fitting the new unit.
- Use a diagnostic tool capable of reading SRS codes and performing required initialization or coding steps for the airbag module.
- Do not attempt to carry out repair work in wet conditions or where static discharge risk is high.
How Often They Fail
Airbag control units are generally long-lived and typically fail only after an impact event, due to water damage, electrical faults or aging electronic components. If the SRS warning light is on, a prompt diagnostic check is recommended — the module itself, deployed components, or related sensors may be the cause.
Notes For Buyers
Search by the OEM references 9655880880, 603554600, 6545HY or 6545HZ to find compatible units for Peugeot 407 applications. Ensure the part number matches the vehicle’s fitted unit to simplify installation and diagnostics.
