Description
AFIL lane-keeping sensor number 6 for Citroën and Peugeot vehicles. A screw that holds the unit to the wheel arch may be seized — it needs to be drilled out.
This AFIL (lane departure/lane-keeping) sensor is designed for workshop and DIY use on selected Citroën and Peugeot models. The unit monitors lane markings and provides input to the vehicle’s driver-assistance system to warn or assist the driver when the vehicle unintentionally drifts from its lane. Many technicians and owners search by part number, so this listing includes common OEM codes for quick identification.
Function And Benefits
The sensor supplies the lane-detection system with data used to detect road markings and lane position. Correct operation is essential for lane-departure warnings and lane-keeping interventions. Replacing a faulty sensor restores reliable lane monitoring and prevents false warnings or loss of system functionality.
Compatibility
- Citroën C4
- Citroën C4 Picasso
- Citroën C5
- Citroën C5 X7
- Peugeot 308
- Peugeot 407
Replacement Procedure (Overview)
- Disconnect Battery: Always isolate the vehicle battery before working on any electrical components.
- Access The Unit: Remove relevant trim or the wheel-arch liner to reach the sensor mounting point; location varies by model.
- Disconnect Connector: Carefully unplug the electrical connector. Inspect pins and housing for corrosion or damage.
- Remove Fasteners: If the mounting screw is seized or damaged, drill out the screw as noted — take care to avoid damage to the housing or surrounding structure.
- Fit New Sensor: Position the new sensor, secure with appropriate fasteners, and reconnect the electrical connector.
- Reassemble And Test: Refit all trim, reconnect the battery, and run system self-checks or a road test to confirm proper operation.
Installation Recommendations
- Use Proper Tools: Solid extraction/drilling tools are recommended if a screw is seized. Protect the sensor housing and surrounding sheet metal when drilling.
- Inspect Wiring: Check the connector and wiring harness for corrosion or broken strands and repair as needed before installing the new sensor.
- Follow Manufacturer Torque: Tighten mounting fasteners to manufacturer specifications where available; avoid over-tightening plastic housings.
- Alignment And Calibration: Some lane-assist systems require calibration or a brief initialization after replacement. Follow vehicle-specific procedures if required.
Common Failure Causes
- Seized Or Damaged Fasteners: Corroded or cross-threaded screws that attach the unit to the wheel arch, sometimes requiring drilling out.
- Water Ingress And Corrosion: Exposure to moisture and road salt can corrode connectors and sensor internals.
- Mechanical Impact: Road debris, minor collisions or contact with the wheel arch area can damage the sensor or its mount.
- Electrical Issues: Connector faults, wiring damage or intermittent contacts cause loss of signal to the lane-assist ECU.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën C4; Citroën C4 Picasso; Citroën C5; Citroën C5 X7; Peugeot 308; Peugeot 407
- Product Codes: 9663116680; 6590W1; 603.016
- Other Numbers: AFIL Sensor 6
Buy this AFIL lane-keeping sensor if you need a direct-fit replacement identified by common OEM codes. The listing is aimed at professional technicians and experienced DIYers who want a clear identification, practical replacement tips and the most likely causes of failure to speed up diagnostics and repair.
