Description
Filler neck for the fuel tank for Citroën C4 Grand Picasso vehicles.
This fuel filler neck is a direct-fit replacement designed for Citroën C4 Grand Picasso models. It restores safe and reliable refuelling by ensuring a proper seal between the filler cap and the fuel tank, preventing leaks and venting problems. The part is frequently searched by OE numbers 9654052280, 9685086780 and 1517E3, making it easy to find for professional mechanics and DIY enthusiasts working on Stellantis cars.
Functionally, the filler neck connects the external fuel flap and cap to the fuel tank, incorporates the fuel vent/overflow connections and the sealing surface for the filler cap. A damaged or leaking filler neck can lead to fuel smell, fuel loss, difficulty refuelling or evaporative system fault codes related to venting.
How To Replace
- Park the vehicle on level ground, work in a well-ventilated area and avoid open flames or sparks.
- Open the filler cap and, if necessary, remove the inner wheel-arch liner or trunk trim to access the filler neck mounting points.
- Disconnect vent hoses and any electrical connectors (if present) and loosen clamps securing the filler neck to the tank and body.
- Unbolt or unclamp the filler neck and carefully withdraw it from the tank outlet; be prepared for some residual fuel.
- Fit the new filler neck with a new gasket/seal if applicable, reconnect hoses and connectors, and secure all clamps and fasteners to the correct tightness.
- Refit trim, check that the filler cap seats correctly and perform a leak check. Start the engine and observe for evaporative system warnings or fuel smell.
Technical Information
- Manufacturer: Stellantis / Citroën
- Model: Citroën C4 Grand Picasso
- Product Codes: 9654052280, 9685086780
- Additional Numbers: 1517E3
Installation Recommendations
- Replace any worn hose clamps and the filler neck gasket/seal when installing the new part.
- Inspect vent hoses and replace brittle or cracked hoses to ensure proper EVAP system function.
- Do not overtighten plastic fasteners; secure metal clamps evenly to avoid deforming the filler neck.
- After installation, check for leaks and ensure the filler cap locks and seals correctly before driving.
- Use appropriate personal protective equipment and dispose of any spilled fuel according to local regulations.
Most Common Failure Reasons
- Corrosion and rust on metal connections or mounting points (especially in regions using road salt).
- Cracking or embrittlement of plastic filler pipes due to age, heat cycles and environmental exposure.
- Damaged or hardened seals and hoses leading to leaks or poor sealing of the filler cap.
- Physical impact or vandalism to the filler area causing deformation or breakage.
- Blocked or restricted venting causing pressure build-up and fuel smell or refuelling difficulties.
Search Tip: This part is commonly identified by OE numbers 9654052280, 9685086780 and 1517E3 — using these codes in searches speeds up locating the correct replacement for Citroën C4 Grand Picasso vehicles.
