Description
Electric fuel flap lock for Citroën C5 and Peugeot 407 vehicles
This Electric Fuel Flap Lock (part number 661520 / NFP) is a direct-fit replacement designed for Citroën C5 and Peugeot 407 models. Ideal for professional workshops and DIY mechanics, the unit restores reliable locking and unlocking of the fuel filler flap as part of the central locking system. Frequently searched by part number 661520, this component helps eliminate problems such as a jammed or non‑responding fuel flap and improves vehicle security and convenience.
Technical information
- Manufacturer: Citroën / Peugeot (Stellantis)
- Model: Citroën C5 I & II; Peugeot 407
- Product Codes: 661520, NFP
- Other Numbers: No additional OEM cross‑references provided
Compatibility and fitment
Designed to fit the fuel filler flap locking mechanism used on Citroën C5 (both first and second generation) and Peugeot 407. The part is commonly searched and ordered by its product code 661520. Ensure physical match to the existing actuator and connector layout before installation.
Installation recommendations
- Work Safely: Park the vehicle on a flat surface and, if possible, disconnect the negative battery terminal before starting electrical work to avoid short circuits.
- Access: Open the fuel flap and remove any interior trim or access panel inside the wheel arch or trunk side to reach the lock actuator. Trim fasteners or clips may need to be removed carefully to avoid damage.
- Disconnect: Unplug the electrical connector from the actuator by releasing the locking tab. Inspect the connector for corrosion or damaged pins.
- Remove: Unscrew the retaining screws or bolts holding the lock assembly and withdraw the actuator from its mounting. Note the orientation for correct reinstallation.
- Fit New Unit: Install the new lock in the same position, secure fasteners to original fit, reconnect the electrical plug, and apply a small amount of dielectric grease to the connector to reduce future corrosion.
- Test Before Reassembly: Operate the central locking and the fuel flap release to confirm correct function before refitting trim panels. Check for smooth locking/unlocking and listen for the actuator movement.
- Final Check: Reassemble trims and verify there are no obstructions to the flap. If the actuator does not operate, inspect related fuses and wiring for continuity.
Most common causes of failure
- Water Ingress and Corrosion: Exposure to moisture, road salt and contaminants leads to corrosion of contacts and internal components.
- Mechanical Wear: Plastic gears or latches inside the actuator can wear or fracture after long service, causing jamming or loss of movement.
- Connector Damage: Corroded or loose electrical connectors and wiring faults prevent power from reaching the actuator.
- Impact/Damage: External damage from collisions or forceful opening can misalign or break the locking mechanism.
- Central Locking System Issues: Less commonly, faults in the vehicle’s central locking control or related fuses/relays may appear as actuator failure; always confirm power supply before replacing the unit.
Replacement of the fuel flap lock is a straightforward repair for experienced technicians and competent DIYers. Using the correct part number (661520) increases the chance of immediate fitment and reduces vehicle downtime.
