BMW 16117243975 Fuel Pump Fuel Tank Mounted

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To remove the fuel system, start by relieving the fuel system pressure and disconnecting the negative battery cable. Then, remove the engine cover, strut tower crossbrace, and sound insulator. Next, remove the ignition coils and disconnect the high-pressure line pipe fittings. Loosen and disconnect the feed pipe fitting on the high-pressure pump, and disconnect the electrical connector from the pump. Loosen the high-pressure fuel pump bolts and remove the pump, making sure to replace the bolts and O-ring. To install the pump, ensure the camshaft lobe is at its Bottom Dead Center (BOC) base circle. Lubricate and install the bucket tappet, then set the pump into the cylinder head and tighten the bolts evenly. Finally, reconnect the negative battery cable, start the engine, and check for fuel leaks.

To remove the fuel level sender and fuel pump assembly: Remove the rear seat cushion. Fold back the insulation material to expose the access cover. Remove the mounting nuts of the access cover and take off the cover from the floor. Through the access hole, disconnect the electrical connectors and the vent hose from the fuel level sensor and fuel pump cover. Unscrew the fuel level sender and fuel pump assembly locking ring and remove it from the tank. Use appropriate tools or methods to accomplish this, such as a pair of pliers pushing on two raised ribs. Carefully lift the fuel level sender and fuel pump assembly cover from the tank. Disconnect the vent hose and wiring plugs from the base of the cover. Note the positioning of the rods in the base of the cover and disconnect hoses from the assembly. Carefully remove the pump/sensor unit from the tank, being cautious not to damage the float arm. If needed, unclip the level sensor from the pump assembly. The sender resistance on full deflection should read 993 ohms, and on zero deflection, it should read 51 ohms.