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The fuel filler flap is a flap or covering which conceals the hole where you put the fuel into a vehicle. The fuel filler flap protects and covers the top of the pipe that connects to the petrol tank.
Usually made of plastic, aluminium or steel, fuel filler flaps are often mounted on a hinge or function with a spring mechanism. The fuel filler flap looks a bit like a miniature door and can be located on either side of the vehicle, towards the back, often on the quarter panel or rear wing. Usually lockable, sometimes linked up to the car's central locking system, the fuel filler flap gives peace of mind when leaving your vehicle parked unattended.
The fuel filler flap serves to prevent dirt, dust and other unwanted debris from entering the fuel pipe and potentially clogging up and damaging the filters. It also functions to stop fuel from spilling, leaking and evaporating out of the vehicle. The fuel filler flap also prevents others from accessing your fuel supply and siphoning the fuel.
Usual reasons for replacing this part include damage to the fuel filler flap or the opening mechanism. Purchasing a fuel filler flap will ensure the part fits perfectly with the make and model of your vehicle.