Description
Side impact sensor for Airbag for Citroën and Peugeot vehicles. ABL acceleration sensor.
Product Overview
The Side Impact Sensor (Part Numbers: 9665617880 / 6546N4) is an OEM-style lateral acceleration sensor used on Citroën and Peugeot vehicles such as Citroën C3 and Peugeot 207. It detects lateral forces during a side impact and supplies the crash signal required to deploy Side Airbag and Seatbelt Pretensioner systems. The sensor is a safety-critical component designed to provide fast and reliable measurements of lateral acceleration to ensure timely occupant protection.
How It Is Replaced
Replacement generally involves removing interior trim panels to access the sensor (commonly mounted in the B-Pillar or door structure), disconnecting the electrical connector, unbolting the old sensor and fitting the new unit in the correct orientation. After mechanical replacement, clear stored fault codes and perform a diagnostic check to confirm correct communication with the Airbag control unit.
Technical Information
- Manufacturer: Stellantis (Citroën / Peugeot)
- Model: Citroën C3; Peugeot 207
- Product Codes: 9665617880, 6546N4
- Other Numbers: 6546N4
Installation Recommendations
- Always Disconnect The Battery Before Starting Work And Follow The Vehicle Manufacturer’s Procedure To Prevent Accidental Airbag Deployment.
- Use Plastic Trim Tools To Remove Interior Panels To Avoid Damage To Trim And Fasteners.
- Note The Orientation And Position Of The Old Sensor Before Removal; Install The New Sensor In The Same Orientation And Torque Fasteners To Manufacturer Specification.
- After Fitment, Clear Airbag Fault Codes And Perform A Full Diagnostic Check With A Compatible Tool. Where Available, Use PSA Diagnostic Equipment For Complete System Verification.
- Because This Is A Safety-Critical Component, Professional Installation Is Recommended If You Are Not Experienced With Supplemental Restraint Systems.
Most Common Failure Reasons
Side Impact Sensors most commonly fail following a side collision, as a result of mechanical damage, or due to water ingress and connector corrosion. Wiring harness damage and intermittent electrical connections can also cause sensor faults. Typical Symptoms Include An Illuminated Airbag Warning Light, Stored Crash Sensor Fault Codes, Or Disabled Side Airbag Circuits.
Notes For Search And Identification
This item is commonly searched by part numbers 9665617880 and 6546N4. When purchasing a replacement Side Impact Sensor for Citroën C3 or Peugeot 207, verify the part number to ensure compatibility with the vehicle’s airbag system.
