Description
Airbag control unit for CITROËN C1 and PEUGEOT 107. The unit is fully functional and has not deployed.
Function
The airbag control unit (SRS module) monitors crash sensors and triggers airbags and seatbelt pretensioners in the event of a collision. It continuously evaluates input from impact sensors, stores fault and event data, and communicates with other vehicle systems via the vehicle network. A correctly working unit is essential for occupant safety and for clearing SRS fault codes after repairs.
Compatibility and Fitment
Designed for Citroën C1 and Peugeot 107 models sharing the same platform and electrical architecture. Common search keywords include the part numbers 89170-0H050 and 6546F6—entering these codes makes it easier for technicians and DIYers to find the exact unit.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C1, Peugeot 107
- Product Codes: 89170-0H050
- Other Numbers: 6546F6, NFP
Replacement Procedure
Replacement of the airbag control unit should be approached with caution. Basic steps used by experienced technicians and knowledgeable DIYers:
- Park the vehicle on a level surface and engage the parking brake.
- Disconnect the negative battery terminal and wait at least 10 minutes (or follow manufacturer specified waiting time) to allow SRS capacitors to discharge.
- Remove interior trim panels necessary to access the SRS module. The unit is typically located in the passenger compartment; exact location varies by model and year.
- Unplug electrical connectors, noting connector locking tabs, and unbolt the unit from its bracket.
- Install the replacement unit, reconnect connectors and secure fasteners. Refit trims in reverse order.
- Reconnect the battery and use an appropriate diagnostic tool to read/clear SRS fault codes and verify that the airbag warning light extinguishes. If fault codes persist, inspect wiring and connectors before proceeding.
Installation Recommendations
- Always disconnect the battery before work to avoid accidental deployment.
- Observe electrostatic discharge (ESD) precautions when handling the unit; avoid touching exposed circuit elements or connector pins.
- Do not install a unit that shows signs of prior deployment or physical damage.
- After installation, perform a full SRS system check with a compatible diagnostic tool to confirm correct operation and to clear any legacy fault codes.
- Follow vehicle manufacturer procedures and torque specifications for fasteners and connectors.
Most Common Causes Of Failure
Airbag control units are relatively robust but can fail or become unusable for several reasons:
- Previous Collision: Units from vehicles involved in accidents may contain stored deployment data or internal damage.
- Water Ingress And Corrosion: Moisture entering the cabin can corrode connectors or the unit housing, causing intermittent faults.
- Electrical Problems: Voltage spikes, poor grounding, or damaged wiring can lead to malfunctioning electronics.
- Connector Damage: Bent or corroded pins and locking tab failures cause bad connections and erroneous fault codes.
Why Choose This Unit
This unit is specified with OEM part number 89170-0H050 and carries the marking 6546F6. It is described as fully functional and not deployed, making it a suitable replacement for technicians and independent repairers seeking a direct-fit SRS control module for Citroën C1 and Peugeot 107 applications.
