Description
Side airbag unit for Peugeot 406
High-quality side airbag unit compatible with Citroën/Peugeot vehicles, designed as a direct-fit replacement for Peugeot 406 models. Ideal for professional workshops and DIY mechanics searching by OE numbers (9631847080, 550540400, 8216N0). The unit restores proper side-impact detection and deployment functionality of the vehicle’s SRS (Supplemental Restraint System) and helps ensure occupant protection after an incident or failure of the original module.
Key Features
Engineered to meet the original mounting and connector layout, this side airbag unit is suitable for use in passenger compartment installations where the factory side sensor/module assembly is required. Clear OE references make it easy to find and verify compatibility. Suitable for technicians who need a reliable replacement part that integrates with the vehicle’s airbag wiring and crash-sensing circuits.
How It Works
The unit monitors side-impact sensors and communicates with the vehicle’s airbag control logic to trigger the side airbags when a qualifying lateral impact is detected. It contains the necessary electronics to interpret sensor inputs and send the deployment command to the airbag inflator circuits, contributing to occupant protection in side collisions.
Replacement Procedure (Overview)
- Disconnect the negative battery terminal and wait at least 10–15 minutes to allow SRS capacitors to discharge.
- Remove interior trim panels and seats as required to access the faulty unit—follow vehicle-specific service manual instructions for trim removal.
- Unplug the electrical connectors and unfasten mounting bolts securing the airbag unit.
- Install the replacement unit in reverse order, ensuring connectors are fully seated and mounting hardware is torqued to manufacturer specification.
- Reconnect the battery and perform SRS system checks as per diagnostic procedures; clear any stored fault codes using an appropriate scan tool.
Why This Part Fails
Common causes of failure include electrical damage from corrosion or short circuits, impact-related damage during a collision, and failure of internal components due to age or moisture ingress. Fault codes in the airbag system or illuminated SRS warning lamp typically indicate a defective unit or wiring fault that requires replacement or repair.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Peugeot 406 (model years commonly 1995–2004)
- Product Codes: 9631847080, 550540400, 8216N0
- Other Numbers: Common OE references used in Citroën/Peugeot parts catalogs
Installation Recommendations
Always follow the vehicle manufacturer’s SRS procedures. Use an appropriate diagnostic tool after installation to confirm system integrity and clear any fault codes. Replace any damaged connectors or wiring harnesses rather than attempting temporary repairs. If unsure, have the installation performed by a qualified technician.
Purchase Advice
Search by OE number (9631847080, 550540400, 8216N0) to quickly verify fitment. This unit is targeted at professionals and experienced DIY mechanics who are comfortable working with SRS components. Installing a correctly referenced replacement restores proper side-impact protection and helps maintain vehicle safety systems.
