Description
Lane Departure Monitoring AFIL Sensor Number 6 For CITROEN PEUGEOT. There may be a seized screw that holds the unit to the wheel arch – it needs to be drilled out.
This AFIL lane departure sensor is a direct-fit replacement designed for a range of Citroën and Peugeot models and is commonly searched by part numbers such as 9659847680 and 6590W1. The unit monitors lane markings and provides input to the vehicle’s driver assistance system to warn the driver of unintentional lane departures. Suitable for professional workshops and experienced DIY mechanics, the sensor is a practical spare when diagnosing ADAS warnings or fault codes related to lane-keeping or lane-departure systems.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën C4, Citroën C4 Picasso, Citroën C5, Citroën C5 (X7), Peugeot 308, Peugeot 407
- Product Codes: 9659847680, 6590W1, 603.016
- Additional Numbers: 9663116680
Installation Recommendations
- Disconnect the vehicle battery before starting work to prevent electrical damage and airbag/ADAS faults.
- Raise the vehicle and remove the wheel and inner wheel-arch liner or trim to access the sensor mounting area. In some vehicles the unit is fixed to the wheel arch and covered by trim.
- If the mounting screw is seized, it will usually need to be drilled or carefully extracted—prepare appropriate drill bits and extraction tools and avoid damaging surrounding bodywork or the sensor housing.
- Unplug the electrical connector and inspect for corrosion or bent pins. Replace connector clips if necessary and secure wiring harnesses to avoid chafing.
- Fit the replacement sensor with the correct orientation and secure fasteners to the manufacturer’s torque specifications where available. Reconnect the battery and clear relevant fault codes after installation.
- Note: The driver assistance system may require calibration or a system reset after replacement—perform calibration with approved diagnostic equipment if warning messages persist.
Why This Part Fails Most Often
- Water Ingress And Corrosion: Exposure to moisture and road salt can corrode connectors and internal electronics over time.
- Impact Damage: Minor accidents or contact with road debris can damage the sensor housing or alignment.
- Electrical Connector Problems: Loose, corroded, or damaged connectors often cause intermittent faults or complete failure.
- Seized Mounting Screw: As noted, the screw holding the unit to the wheel arch can seize, complicating removal and sometimes leading to damage during extraction.
- Age-Related Wear: Thermal cycles and vibration shorten component life, especially on higher-mileage vehicles.
Part numbers 9659847680, 6590W1 and 9663116680 are commonly used to identify this AFIL sensor — use these codes when searching for a direct replacement to ensure compatibility with the listed Citroën and Peugeot models.
