Product Overview

This electric fuel flap lock is designed for Citroën and Peugeot models, commonly fitted on vehicles such as the Citroën C4 Picasso. It replaces the original locking mechanism for the fuel filler flap and integrates with the vehicle’s central locking system to secure the fuel filler door and prevent unauthorized access. Ideal for professional workshops and experienced DIY mechanics, this part is often searched by its product numbers 9658236780 and 9660019180.

Key Benefits

• Direct replacement for original equipment locks — restores secure locking of the fuel flap.
• Electric actuator compatible with central locking signals — operates with remote/central locking.
• Improves vehicle security by preventing fuel theft and unwanted access to the filler neck.
• Part numbers included for easy lookup in catalogs and parts search.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model(s): Citroën C4 Picasso (and related PSA platform vehicles)
• Product Codes: 9658236780, 9660019180
• Additional Numbers: 661537, 661542

Function

The unit is an electric latch/actuator that secures the fuel filler flap. It receives a locking/unlocking command from the central locking system and mechanically holds or releases the flap. Proper operation ensures that the fuel flap opens only when the vehicle is unlocked and remains locked when the vehicle is secured.

Replacement Procedure

Typical replacement requires removing interior trim panels or accessing the assembly from inside the trunk/fuel filler area, depending on the vehicle body style. Steps include:

• Disconnect Battery Before Work: Always disconnect the vehicle battery prior to removal to avoid short circuits and unintended actuator movement.
• Remove Trim: Remove the appropriate trim or access panel to reach the fuel flap lock assembly.
• Disconnect Electrical Connector: Unplug the wiring harness from the actuator—inspect connector for corrosion or damage.
• Unscrew/Unclip Lock: Remove fasteners or clips securing the lock, extract the unit, and transfer any required linkage or brackets to the new part if applicable.
• Install New Unit: Fit the replacement lock, secure fasteners, reconnect the electrical connector, and reassemble trim panels.
• Function Check: Reconnect the battery and verify correct locking/unlocking operation using the central locking and the fuel flap release.

Installation Recommendations

• Follow Manufacturer Procedures: Use appropriate tools and follow the vehicle manufacturer’s instructions to avoid damage to trim and fasteners.
• Inspect Wiring And Connectors: Check for corrosion or damaged wires; clean or repair as needed to ensure reliable electrical connection.
• Test Before Final Assembly: Verify correct operation of the lock before refitting interior panels to avoid repeat removal.
• Use Proper Fasteners: Replace any broken clips or worn screws to ensure secure fitting and prevent rattles.

Why This Part Commonly Fails

Failures typically result from mechanical wear of the latch mechanism, plastic fatigue or breakage, and corrosion of electrical contacts due to moisture ingress. Repeated exposure to road salts, water intrusion around the filler flap, or heavy use can accelerate wear. Electrical faults such as connector corrosion or wiring damage can prevent the actuator from receiving the locking signal.

Notes For Professionals And DIYers

• This part is intended for use by qualified technicians or experienced DIY mechanics comfortable with trim removal and basic electrical checks.
• When replacing the unit, inspect surrounding seals and the fuel flap hinge for wear—addressing these can extend the service life of the new lock.