13 53 596 Replacing high-pressure fuel sensor (N55)

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Special tools required:

32 1 270
32 2 100

WARNING: Observe warning on cylinder head cover.

Disconnect NEGATIVE BATTERY 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 40 °C.

IMPORTANT: Wear full face guard and protective gloves.

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

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD PROTECTION) .

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 work:

Remove IGNITION COIL COVER
Remove CLEAN AIR PIPE

Recycling:

Fuel escapes when fuel lines are detached.

Catch and dispose of escaping fuel in a suitable container.

Observe country-specific waste disposal regulations.

Release screws (1).

Put cable channel aside.

Fig 1: Identifying Cable Channel And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock plug (1) and remove.

Release high-pressure sensor (2) and remove.

Tightening torque 13 53 4AZ with special tool 32 2 100.

Seal rail (3) 32 1 270 if necessary with a matching plug from special tool kit.

Fig 2: Identifying High Pressure Sensor Connector And Rail

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check fuel system for leaks.

Check function of DME.