Description
Side impact sensor for airbag for CITROËN and PEUGEOT vehicles. ABL acceleration sensor.
Product Overview
This side impact (side crash) sensor is designed to detect lateral acceleration and provide a fast, reliable signal to the airbag control unit in Citroën and Peugeot vehicles. It is commonly referenced by OE numbers 9665617880 and 6546N4 (ABL type). The sensor is intended for professional garages and experienced DIYers who perform safety-system repairs and replacements.
Function and Symptoms
- Function: Measures lateral acceleration during a side impact and informs the airbag control module so that side airbags and curtain airbags can deploy when necessary.
- Typical Symptoms Of A Faulty Sensor: Airbag warning lamp illuminated; stored airbag faults in the diagnostic unit; potential deactivation of side airbag deployment; fault codes related to side impact sensors.
Compatibility
Fits various Citroën and Peugeot models. Known compatible models include Citroën C3 and Peugeot 207. Always check the product codes (9665617880 / 6546N4) against the vehicle’s parts list before installation.
Replacement And Installation
Replacement should be performed by a qualified technician or an experienced DIYer comfortable with vehicle safety systems. General replacement steps:
- Always Disconnect The Battery Before Starting Work And Wait The Manufacturer‑Specified Time To Avoid Accidental Airbag Deployment.
- Locate The Sensor — On Different Models The Side Impact Sensor May Be Mounted In The Door, B‑Pillar Or Seat Area; Refer To The Vehicle Repair Manual For Exact Location.
- Remove Interior Trim Panels Carefully To Access The Sensor Fasteners And Electrical Connector.
- Unplug The Connector And Remove The Sensor Fasteners; Replace With The New Sensor, Ensure Correct Orientation And Secure To The Specified Torque.
- Reconnect The Connector, Refit Trim, Reconnect The Battery.
- After Installation, Use A Diagnostic Tool To Clear Airbag Fault Codes And Verify That The Airbag System Reports No Faults.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C3; Peugeot 207
- Product Codes: 9665617880, 6546N4
- Additional Numbers: ABL (Acceleration Sensor Type)
Installation Recommendations
- Use Proper Trim Tools To Prevent Damage To Interior Panels.
- Observe Correct Fastening Torque For The Sensor Mounting Bolts As Specified In The Repair Manual.
- Ensure Electrical Connectors Are Clean And Fully Seated; Replace Corroded Connectors Or Fasteners.
- After Replacement, Perform A Full Airbag System Check With A Professional Diagnostic Tool And Clear Any Stored Faults.
- If The Vehicle Has Been Involved In A Collision, Inspect Wiring Harnesses And Mounting Points For Damage Before Installing A New Sensor.
Most Common Reasons For Failure
- Physical Damage From A Previous Collision Or Impact.
- Corrosion Or Water Ingress Affecting The Sensor Or Its Connector, Especially In Older Vehicles Or Cars Exposed To Road Salt.
- Electrical Connector Problems — Loose Pins, Broken Wires Or Poor Contact.
- Internal Electronics Wear Or Failure Due To Age Or Harsh Operating Conditions.
Ordering by OE numbers 9665617880 and 6546N4 ensures quick identification and increases the chance of fitment for Citroën and Peugeot models. Replace faulty side impact sensors promptly to maintain full functionality of the vehicle’s passive safety systems.
