2016-2019 BMW 7 Series Fuel Tank 40802XXXX

Also known as

Gas Tank

Petrol Tank

Fuel Reservoir

Fuel Cell

Gasoline Tank Assembly

What this part does

The fuel tank safely stores the gasoline required to operate the vehicle and provides the primary mounting housing for the internal fuel pump and level sending units. Positioned securely beneath the rear passenger compartment and forward of the rear axle, it acts as a structurally reinforced reservoir that maintains strict system pressure while handling varying fuel levels and temperatures. It features internal baffling to prevent fuel starvation during cornering and integrates directly with the vehicle's evaporative emissions system to capture volatile fuel vapors. When this component is compromised by physical road debris impact, mounting point fatigue, or internal contamination, it leads to active fuel leaks, a loss of pressure in the fuel delivery system, and persistent EVAP diagnostic trouble codes.

Fits these vehicles

OEM and interchange numbers

40802XXXX

Before you order

Verify that your vehicle is an all-wheel-drive (xDrive) configuration before purchasing. The saddle shape of this fuel tank is molded specifically to clear the xDrive transfer case and central driveshaft; standard rear-wheel-drive tanks have a different central profile and will not physically interchange. This unit is provided as the bare tank shell. The primary internal fuel pump, crossover suction lines, and level sensors must be transferred from your original unit. It is highly recommended to replace the plastic lock rings and rubber O-ring seals during the transfer process to prevent pressure leaks. Inspect your existing steel tank mounting straps for severe corrosion or stretching, as they carry the full weight of the fuel load and often require replacement when dropping the tank.