Components

Components
The fuel tank is located above the drive shaft in front of the rear axle (similar to E46 (3 series) and is secured by two tensioning straps. The fuel tank capacity is 67 liters, including 8 liters of reserve fuel. It is made of plastic (multi-layer HOPE) with an intermediate layer (barrier layer).





Access to the fuel filter, pressure regulator, the two fuel level sensors and the electric fuel pump are through the two service access covers. The fuel filler neck is secured to the right hand side of the fuel tank with hose clamps.





The fuel delivery unit comprises the following components in the right hand side of the fuel tank:
^ Fuel baffle with electric fuel pump and right hand suction-jet pump
^ Right hand fuel level sensor
^ Fuel filter with pressure regulator.
In the left hand side of the fuel tank:
^ Left hand fuel level sensor
^ Left hand suction-jet pump
The components are accessible through the two service access covers.





The fuel filter and the pressure regulator form one component, the pressure regulator for the M54 engines are 3.5 bar.
The fuel filter is replaced together with the pressure regulator for service repairs.