AFIL sensor 2 Citroën Peugeot 9663116280 6590W1

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 monitoring) is intended for driving assistance systems in Citroën/Peugeot cars. It serves as part of the electronics that evaluates the information for the lane keeping function. This makes it suitable as a replacement when the original sensor fails, after an accident or when solving problems with a non-functioning AFIL.

During disassembly/assembly, be aware that there may be a snapped screw holding the unit – in this case, according to the note, drilling is necessary.

Technical information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C4, Citroën C4 PICASSO, Citroën C5, Citroen C5 X7, Citroën C6, Peugeot 308, Peugeot 407
• Other numbers: 603.012

Product codes

• Product codes: 9663116280, 6590W1

Installation recommendations

Generally/typically for this type of electrical sensor it is important to match the markings and connectors and work to avoid damaging the wiring. The exact procedure may vary depending on the specific model and design of the car.

1) Before assembly

• Compare with the old part: numbers 9663116280 / 6590W1, possibly other markings (e.g. 603.012), sensor body shape and connector type/securement.
• Check the condition of the connector (bent pins, oxidation), cracks in the plastic, damage to the attachment.
• Expect the possibility that the mounting screw may be notched – prepare a drilling plan.

2) Necessary tools and materials

• Basic set of ratchets/bits and screwdrivers (depending on the mounting design)
• Tools for releasing connectors (small flat screwdriver/plastic pry bar)
• Cleaner for electrical contacts and possibly a soft brush
• In case of a cracked screw: drill, drilling/centering tool, or screw extractor
• Protective gloves and goggles (especially when drilling)

3) Step-by-step assembly procedure

1. Turn off the ignition and disconnect the battery (recommended safe practice for electrical parts).
2. Provide access to the sensor according to the car design (removal of covers/trims as needed).
3. Document the original condition: photo location, wiring routing and connector securing.
4. Remove the electrical connector carefully (do not pull on the cables; release the connector fuse).
5. Unfasten the sensor. If the screw is damaged/cracked, proceed in a controlled manner – do not like to crack the brackets.
6. If the screw is notched, prepare the hole: secure the surroundings against damage and proceed slowly to avoid damage to the bracket/bodywork.
7. Remove the old sensor and compare it with the new piece (numbers, connector, mounting).
8. Clean the contact surfaces and the connector (or use a contact cleaner and let it air out).
9. Place the sensor in the correct position and attach it in the original way.
10. Connect the connector and check that the connector fuse clicks properly.
11. Put back the removed covers/trims and check that there is no pinched wiring.
12. Connect the battery, turn on the ignition and perform a basic system function check.

• 4) Post-assembly checks and test drive/function verification

  • Check that the connector is firmly secured and the wiring is not under tension.
  • Verify that no obvious warnings related to assistance systems appear when the ignition is turned on (if they do, continue with diagnostics).
  • Perform a function verification according to the vehicle’s capabilities (typically a test of assistance functions when driving in safe conditions).

  5) The most common assembly mistakes + how to avoid them

  • Exchanging the part according to the appearance → always follow the numbers 9663116280 / 6590W1 and the connector/mount match.
  • Damage to the pins in the connector → release the connector via the fuse, do not pull on the cables.
  • Insufficient mounting of the sensor → after tightening, check that the sensor does not move and remains in position.
  • Not solving the cracked screw with force → preferably controlled drilling, so that the holder does not crack or the surroundings are damaged.

  Reasons why the part is damaged

  • Mechanical damage (impact, vibration, fixing damage including torn/cracked screws).
  • Moisture and corrosion in the connector (oxidation of pins, transition resistances, signal dropouts).
  • Damage to the wiring around the sensor (broken wires, punctured insulation, loose connector).
  • Electronic aging and thermal stress which can lead to unstable function or complete failure.