Description
Airbag control unit for Citroën C1 and Peugeot 107. Fully functional, unactivated unit.
This Airbag Control Unit (SRS Control Module) is compatible with first-generation Citroën C1 and Peugeot 107 models and is offered with original part references for quick identification. Ideal for professional workshops and experienced DIY mechanics who search by part number (e.g. 89170-0H040 or 6546F7). The unit manages airbag deployment logic and crash data recording, restoring proper SRS function after replacement is essential for occupant safety.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C1 I, Peugeot 107 I
- Product Codes: 89170-0H040, 6546F7
- Additional Numbers: Please refer to the label on the unit for internal or production codes
Function
The unit monitors the vehicle’s sensors related to occupant protection and triggers airbag deployment in the event of a qualifying impact. It stores crash event data and SRS fault codes, communicates with the vehicle’s diagnostic bus, and controls pre-tensioners and other restraint functions where applicable.
How To Replace
- Park the vehicle on a level surface and disconnect the negative battery terminal. Wait at least 2 minutes (longer if recommended by the vehicle manufacturer) to allow residual charge to dissipate.
- Remove surrounding trim panels to access the airbag control unit location (usually under the center console or behind the glovebox on these models).
- Unfasten mounting bolts and carefully unplug the electrical connectors. Inspect connectors and wiring for damage or corrosion.
- Install the replacement unit, secure mounting bolts, and reconnect connectors. Refit trims in reverse order.
- After installation, clear SRS fault codes and verify system status with a compatible diagnostic tool. In some cases the unit may require initialization or coding to the vehicle.
Installation Recommendations
- Always disconnect the battery before work and follow manufacturer safety procedures to avoid accidental deployment.
- Use a professional diagnostic tool to read and clear SRS fault codes after replacement. Confirm the SRS warning lamp behavior and run system self-tests.
- Inspect wiring harnesses and connector pins for damage; repair any corrosion or broken pins before finalizing installation.
- If unsure about coding or initialization procedures, have the vehicle serviced by a qualified technician with PSA diagnostic equipment.
Most Common Failure Causes
- Airbag Deployment: Units removed from vehicles involved in collisions are often recorded as non-functional or altered due to deployment events.
- Water Ingress And Corrosion: Moisture reaching the unit or connectors can cause internal corrosion and electrical faults.
- Electrical Surges Or Short Circuits: Faulty wiring or previous improper jump-starts can damage internal electronics.
- Connector Damage And Mechanical Stress: Broken pins, loose connections, or poor repairs lead to intermittent faults or permanent failure.
Search And Identification Tips
When searching, include part numbers and common keywords to improve results: Airbag ECU 89170-0H040, SRS Control Module 6546F7, Citroën C1 airbag module, Peugeot 107 airbag ECU. Matching the part number typically yields the best compatibility results.
Safety Notice
Work on the Supplemental Restraint System involves inherent risks. If you are not experienced with SRS components, have the replacement and final system checks performed by a qualified workshop.
