Fitment Audi A4 2017-2019 2.0L What does the fuel pump do? The car's fuel pump is a vital component that works to pump fuel from the fuel tank to the engine, doing so by generating high pressure in the fuel line. When the engine pushes the crankshaft down, a vacuum is created in the cylinder assembly, this vacuum draws fuel from the pump through the line, then the fuel is pressurized and sent to the injectors for injection into the cylinders. It's important that your car's fuel pump is strong enough to overcome the resistance of the fuel line and the force of the movements that the car encounters while driving. Therefore, the pump is carefully designed to achieve reliable performance. .
