Description
Airbag control unit for Citroën C1, Peugeot 107 and Toyota Aygo. It is fully functional.
Description
This airbag control unit (SRS/Airbag ECU) is a direct-fit electronic module used on Citroën C1, Peugeot 107 and Toyota Aygo. Designed to monitor impact sensors and deploy restraint systems in the event of a collision, the unit communicates with the vehicle’s safety network to control airbag deployment and related functions (seatbelt pretensioners, warning lamp). Ideal for professional workshops and experienced DIY mechanics looking for a reliable replacement with the referenced part numbers.
Features And Benefits
- Direct compatibility with Citroën C1 / Peugeot 107 / Toyota Aygo platforms (check product codes below).
- Saves time for workshops by matching OEM form, fit and connector layout.
- Restores full SRS functionality when installed correctly and cleared with diagnostics.
- Important part numbers included for fast search and ordering: 89170-0H010, 6546F5.
How It Works And Typical Symptoms
The airbag control unit continuously monitors impact sensors, acceleration sensors and seatbelt pretensioner circuits. When a threshold impact is detected, the unit triggers the appropriate airbags and pretensioners. Common signs that the unit (or related SRS system) is faulty include the airbag warning lamp illuminated on the dash, intermittent SRS faults, or the airbags being non-functional after a collision.
Replacement Procedure (Overview)
- Disconnect the negative battery terminal and wait at least 10 minutes to allow the SRS capacitors to discharge.
- Locate the unit (position can vary by model; commonly fitted under the passenger area or central console—refer to the vehicle workshop manual).
- Remove surrounding trim and secure fasteners, then disconnect the wiring harness carefully—avoid pulling on wires.
- Install the replacement unit, secure mounting bolts to manufacturer torque, and reconnect harnesses.
- Use a diagnostic scanner to read and clear SRS fault codes, verify system readiness and perform any required initialization or calibration.
- Reinstall trim and reconnect the battery. Confirm the airbag warning lamp extinguishes after key-on self-check.
Installation Recommendations
- Always disconnect the battery before starting work and observe safety precautions for SRS components.
- Handle the unit and connectors with care; avoid exposure to moisture and contaminants during installation.
- After fitting, perform a full SRS scan with an appropriate diagnostic tool to clear historic crash data and confirm no persistent fault codes remain.
- If the vehicle has been in a collision, check all SRS wiring, connectors and impact sensors for damage before replacing the unit.
- When in doubt, have the final checks performed by a trained technician with SRS experience.
Most Common Reasons For Failure
- Unit Activation During A Collision: Modules often become non-serviceable after deployment or store crash data that must be addressed.
- Water Ingress Or Corrosion: Moisture reaching the ECU or its connectors can cause shorts and failures.
- Electrical Surges Or Short Circuits: Faulty wiring or jump-starting errors may damage the module.
- Connector Damage Or Poor Contacts: Physical damage or corrosion at the plug can create intermittent faults or loss of communication.
- Impact Onboard Components: Damaged sensors, pretensioners or airbag wiring loom can cause the ECU to register faults.
Technical Information
- Manufacturer: Stellantis
- Model: Citroën C1; Peugeot 107; Toyota Aygo
- Product Codes: 89170-0H010; 6546F5
- Other Numbers: NFP
Who Should Fit This Part
Recommended for experienced automotive technicians and competent DIYers familiar with SRS systems. Because the airbag system is a critical safety component, proper installation and post-installation diagnostics are essential to ensure occupant protection.
Note On Functionality
Seller states that the unit is fully functional. After installation, verify system status with a diagnostic tool to ensure the SRS warning lamp behaves normally and no stored crash codes remain.
