BMW 7 Series: Replacing Low-Pressure Fuel Sensor (N63)

WARNING: Disconnect BATTERY NEGATIVE TERMINAL (risk of fire due to short-circuiting on removal).

Electric fuel pump starts up automatically when door is opened! Carry out installation work on fuel system only with coolant temperature below 40ºC.

Wear protective goggles.

IMPORTANT: Adhere to conditions of absolute cleanliness when working on the high-pressure fuel system.

Introduced contaminants can cause malfunctions in the system!

• Do not allow any dirt particles or foreign bodies to get into the system.
• Remove all traces of dirt before removing pipes or individual components.
• Use only fluff-free cloths.
• Seal all fuel system openings with protective caps or plugs.

IMPORTANT: Ignition coils must not be fouled by fuel.

The resistance of the silicone material is reduced significantly by contact with fuel, which may cause the ignition coil to fail! Cover ignition coil with suitable means.

Necessary preliminary tasks

• Remove left intake duct.

Recycling

Catch and dispose of escaping fuel in a suitable container.

Observe country-specific waste-disposal regulations.

Unlock plug (1) and remove.

Release low-pressure fuel sensor (2).

Tightening torque 13 53 9AZ.

Installation:

Replace sealing ring on low-pressure fuel sensor.

Fig. 40: Identifying Low-Pressure Fuel Sensor With Plug

Assemble engine.

Check fuel system for leaks.

Check function of DME.

REPLACING LEFT HIGH-PRESSURE FUEL SENSOR (N63)

WARNING: Observe warning on cylinder head cover.

Electric fuel pump starts up automatically when door is opened! Carry out installation work on fuel system only with coolant temperature below 40ºC.

IMPORTANT: Wear full face guard and protective gloves.

Fuel can emerge spontaneously at high velocity when the high-pressure line is released!

IMPORTANT: Adhere to conditions of absolute cleanliness when working on the high-pressure fuel system.

Introduced contaminants can cause malfunctions in the system!

• Do not allow any dirt particles or foreign bodies to get into the system.
• Remove all traces of dirt before removing pipes or individual components.
• Use only fluff-free cloths.
• Seal all fuel system openings with protective caps or plugs.

Necessary preliminary tasks

• Remove left RAIL

Recycling

Catch and dispose of escaping fuel in a suitable container.

Observe country-specific waste-disposal regulations.

Release high-pressure sensor (1) and remove.

Tightening torque 13 53 8AZ.

Fig. 41: Identifying High Pressure Sensor

Assemble engine.

Check fuel system for leaks.

Check function of DME.

REPLACING RIGHT HIGH-PRESSURE FUEL SENSOR (N63)

WARNING: Observe warning on cylinder head cover.

Electric fuel pump starts up automatically when door is opened! Carry out installation work on fuel system only with coolant temperature below 40ºC.

IMPORTANT: Wear full face guard and protective gloves.

Fuel can emerge spontaneously at high velocity when the high-pressure line is released!

IMPORTANT: Adhere to conditions of absolute cleanliness when working on the high-pressure fuel system.

Introduced contaminants can cause malfunctions in the system!

• Do not allow any dirt particles or foreign bodies to get into the system.
• Remove all traces of dirt before removing pipes or individual components.
• Use only fluff-free cloths.
• Seal all fuel system openings with protective caps or plugs.

Necessary preliminary tasks

• Remove right FUEL RAIL.

Recycling

Catch and dispose of escaping fuel in a suitable container.

Observe country-specific waste-disposal regulations.

Release high-pressure sensor (1) and remove.

Tightening torque 13 53 8AZ.

Fig. 42: Identifying High Pressure Sensor

Assemble engine.

Check fuel system for leaks.

Check function of DME.

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