Description
Lane driving sensor AFIL number 4 for CITROEN PEUGEOT
cars
There may be a broken screw that holds the unit to the undercarriage – must be unscrewed
Part description
This AFIL sensor (Lane Driving Sensor) for Citroën/Peugeot cars is used as part of the Lane Keeping Assist system. If the original sensor is malfunctioning, replacement is usually the fastest way to restore proper system operation.
The part is mainly searched for by product numbers, so when ordering, always compare the markings on your original part with the codes listed here.
Technical information
- Manufacturer: Stellantis
- Model: Citroën C4, Citroën C4 PICASSO, Citroën C5, Citroen C5 X7, Citroën C6, Peugeot 308, Peugeot 407
- Other numbers: 6590W1
Product codes
- Product codes: 9663116580, 6590W1
Installation recommendations
Generally/typically for AFIL sensors it is an electronic part mounted on the body/holder and connected via a connector. The exact procedure may vary depending on the specific model and design of the car.
1) Before assembly (checks of used part)
- Compare the part numbers (9663116580, 6590W1) with the old sensor.
- Check the condition of the connector and pins (must not be bent, squeezed, corroded).
- Inspect the body of the sensor and the attachment (cracks, deformations, damaged contact surfaces).
- Be aware that the fixing screw may be “notched” – depending on the substrate, it may be necessary to drill it out.
2) Necessary tools and materials
- Basic set of ratchets/bits and screwdrivers
- Thread releaser (penetration), dirt brush
- Drill and tools for drilling out the damaged screw (if any)
- Cleaning agent for electrical contacts (as needed)
3) Step-by-step assembly procedure
- Turn off the ignition and disconnect the battery (typically to protect the electronics).
- Ensure access to the sensor (depending on the car design, it may be necessary to remove the covers/undercarriage).
- Clean the area around the part so that dirt does not get into the connector and on the contact surfaces.
- Disconnect the electrical connector – release the connector lock and pull the connector out without prying the wiring.
- Allow the sensor fastener(s). If the screw is notched, use penetration and proceed with caution.
- If the bolt is really notched and won’t loosen, proceed to drill out (work precisely to avoid damaging the bracket/bodywork).
- Remove the old sensor and check the bearing surface/holder (dirt, corrosion, deformation).
- Place the new (used) sensor in the same position as the original piece.
- Fix the sensor – tighten smoothly and without violence to avoid damaging the plastic or thread.
- Connect the connector and verify that the fuse clicks properly.
- Put back the removed covers/undercarriage (if removed).
- Connect the battery and turn on the ignition.
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4) Post-assembly checks and test drive/function verification
- Check that the connector is firmly secured and that the wiring is not strained or frayed.
- Verify that no related system error messages/indications appear after boot.
- Perform the function verification under normal conditions (if the system is active in the car) and observe the stability of the behavior without dropouts.
5) The most common assembly mistakes + how to avoid them
- Exchanging the part according to appearance – codes 9663116580 / 6590W1 always decide.
- Damage to connector pins from careless disconnection – use connector fuses, do not pull on cables.
- Improper seat on bracket/seat – clean and check seat before mounting.
- Torn/Notched Screw – work with penetration and the right tools; protect surrounding parts when drilling.
Reasons why the part is damaged
- Moisture and corrosion in the place of the connector or attachment, subsequently deteriorated contact.
- Mechanical stress (shocks, vibrations) and gradual loosening/damage of the attachment.
- Damage to the wiring around the sensor (abrasion, pinching), which manifests itself as a malfunction.
- Unprofessional disassembly – broken connector fuses, torn screws, damaged threads.
