Product Overview

High-quality airbag control unit manufactured by Autoliv, designed for Peugeot 407 vehicles. This unit is responsible for monitoring the airbag system, processing inputs from crash and occupant sensors and triggering deployment of airbags and seatbelt pretensioners when necessary. Commonly searched under OEM and supplier codes, this module is a direct-replacement part for vehicles with matching part numbers.

Key Benefits

• Direct replacement for vehicles using the listed part numbers — simplifies sourcing and reduces downtime.
• Designed to meet original crash-detection and deployment logic for occupant safety systems.
• Compact, durable electronics built for automotive vibration and thermal environments.

Application / Compatibility

Fits Peugeot 407 models equipped with the Autoliv airbag control module. Match the unit by product code to ensure compatibility. Commonly referenced numbers and supplier codes are included below to help identify correct fitment.

Technical Information

• Manufacturer: Autoliv
• Model: Peugeot 407
• Product Codes: 9654717280, 603554600
• Other Numbers: 6545HY, 6545HZ

Function

The airbag control unit continuously monitors crash sensors, impact thresholds and seatbelt pretensioner circuits. In a collision event, it evaluates sensor data and, if thresholds are exceeded, commands deployment of airbags and pretensioners. It also stores fault codes and crash event data for diagnostics.

Typical Failure Modes

Airbag control units are generally long-lived but can fail or require replacement for several reasons:

• Activation After A Crash: Unit Replacement Is Required After Airbag Deployment.
• Water Ingress Or Humidity Damage Causing Corrosion Of Connectors Or Internal Electronics.
• Electrical Surges Or Short Circuits In The Vehicle Wiring Causing Internal Damage.
• Connector Corrosion Or Poor Grounding Leading To Intermittent Faults And Error Codes.
• Sustained Fault Codes Indicating Internal Sensor Or Memory Errors.

Replacement And Installation

Installation should be performed by a qualified technician or a competent DIY mechanic following safe procedures. General steps:

• Disconnect The Vehicle Battery And Wait Sufficient Time For Capacitors To Discharge (Manufacturer Recommendations Typically Apply).
• Locate The Airbag Control Unit (Refer To Vehicle Repair Manual For Exact Position And Fixing Points).
• Carefully Disconnect Wiring Harnesses, Observing Connector Locks And Pin Alignment.
• Remove Mounting Fasteners And Replace Unit With Correct Part.
• Reconnect Harnesses Securely, Refit Fasteners To Specified Torque, And Reconnect The Battery.

A diagnostic scan tool is recommended after installation to confirm fault codes are cleared and the system reports normal status. Avoid Opening Or Attempting To Repair The Unit; Replace If Damaged.

Mounting Recommendations

• Always Use Proper Torque For Mounting Bolts To Avoid Excessive Vibration Or Movement.
• Ensure Connectors Are Clean, Dry And Fully Seated; Use Dielectric Grease On Exposed Pins If Recommended By Repair Manual.
• Avoid Placing Unit Where It Will Be Exposed To Water Or Direct Heat Sources.

Why This Part Is Searched By Mechanics And DIY Enthusiasts

Airbag control units are commonly requested by part number after a collision or when the airbag light indicates a fault. Providing accurate OEM and supplier codes helps technicians quickly verify compatibility and source the correct replacement module.

Important Notes

• Do Not Attempt To Reprogram Or Clone The Unit Unless You Have The Appropriate Diagnostic Equipment And Expertise.
• Replacement May Require Diagnostic Clearing Of Crash Data And Verification Of Sensor Inputs Using Professional Tools.

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.

1. Read Fault Codes: Use an SRS-capable diagnostic tool to read stored crash and fault codes before removal.
2. Power Down Safely: Disconnect the negative battery terminal and wait at least 10 minutes to allow SRS capacitors to discharge.
3. Access Unit: Remove necessary trim and fasteners to reach the airbag control unit securely mounted in the vehicle.
4. Disconnect Connectors: Carefully release the SRS connectors, inspect pins for corrosion or damage, and unplug the module.
5. Swap Unit: Unbolt the old unit and fit the replacement, securing it with the original fasteners and torque where specified by the vehicle manufacturer.
6. 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.
7. 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.