Audi A 3 Fuel Pump Relay. Diagnosing simple fuel pump problems is within the reach of the average car owner. The relay basically functions as a switch.
A high-capacity pump can supply an engine making greater-than-stock horsepower. I think the fuel pump relay is in the engine compartment fuse/relay panel, to the right of the battery. The relay basically functions as a switch.
Kaehler Automotive Equipment (KAE) is a German manufacturer that specializes in aftermarket system relays including fuel pump relays, A/C.
There are different reasons due to which the fuel pump relay fails.
Remove the panel (storage compartment) underneath the steering wheel and you will see four relays, the fuel pump relay is the one on the left. However, some fuel pump relays come in different shapes and sizes, so it's best to locate your manufacturer's diagram if you're having trouble finding your fuel pump relay. Make Audi BMW Mercedes Benz MINI Porsche Volkswagen.