This fuel filler flap release switch is a direct-fit control for Citroën C4 II and DS4 models. Designed in FXT specification with a Black Cornelie finish, it restores reliable opening of the fuel filler flap and integrates with the vehicle’s electrical system for a clean, factory-like operation. Ideal for professional workshops and DIY mechanics who need a straightforward replacement part referenced by OE numbers.

Technical Information

• Manufacturer: Stellantis / Citroën
• Model: Citroën C4 II, DS4
• Product Codes: 96664235ZD, 6490JR
• Additional Numbers: 9664235Du, 9664235ZD

Compatibility

Fits Citroën C4 II and DS4 vehicles. Check the vehicle model and part references when searching by OE number to ensure compatibility with your specific variant.

Function

The switch operates the electric release mechanism for the fuel filler flap, sending a signal to the actuator or body control module to release the flap latch. A fully functioning switch provides quick, repeatable opening of the fuel door from the driver’s cabin and prevents manual forcing that can damage the flap or surrounding trim.

Common Failure Causes

• Electrical Contact Wear: Repeated cycles can wear internal contacts, causing intermittent or complete loss of function.
• Moisture Ingress: Water or condensation can corrode contacts or cause short circuits.
• Mechanical Damage: Broken actuator lever or plastic housing from impact or excessive force when operating the flap manually.
• Contamination: Dirt, spilled liquids, or salt can impair switch operation.

Replacement Guide

General replacement steps suitable for experienced mechanics and competent DIYers:

1. Prepare Tools: Trim removal tools, small screwdriver, and a clean workspace.
2. Safety First: Disconnect the negative battery terminal before starting electrical work to avoid shorts.
3. Remove Trim: Carefully pry away the trim panel or bezel around the switch to access mounting fasteners.
4. Unplug Connector: Disconnect the electrical connector from the switch. Inspect the connector for corrosion or damage.
5. Swap Switch: Remove the retaining screws or clips, replace with the new switch, and secure it in place.
6. Test Operation: Reconnect the battery and verify the fuel flap opens reliably before reassembling trim.
7. Reassemble: Refit trim panels and check for correct fit and finish.

Installation Recommendations

• Handle Electrical Connectors Gently: Avoid bending pins; clean contacts if corroded and apply a light dielectric grease if appropriate.
• Check Actuator Function: If the flap still does not open after replacing the switch, inspect the actuator and wiring for faults.
• Use Proper Trim Tools: Prevent breakage of clips and panels during removal and reinstallation.
• Final Check: Verify the switch operation with the ignition on and perform several cycles to confirm reliability.

This switch is a practical spare for workshops and owners maintaining Citroën C4 II and DS4 vehicles. Supplied to match OE references, it offers a fast-fit replacement to restore normal fuel filler access and avoid potential damage from forcing a stuck flap.