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

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Special tools required: 

WARNING: High-voltage system - danger to life!
The following points must be strictly observed prior to starting work  :
WARNING: Observe warning on cylinder head cover.
Disconnect NEGATIVE BATTERY TERMINAL and NEGATIVE BATTERY TERMINAL OF AUXILIARY BATTERY (risk of fire caused by short circuit during dismantling).
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 speed when the high pressure line is released!
IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (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 lines or separate components.
  • Use only fluff-free cloths.
  • Seal all fuel system openings with protective caps or plugs.

Necessary preliminary work: 

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 positive battery cable (1) from cable channel.

Disengage cable channel cover (2) to the left and lift out.

Fig 1: Identifying Positive Battery Cable And Channel Cover
G09921392Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Slide cable channel (2) to one side.

Fig 2: Identifying Cable Channel And Screws
G09875350Courtesy of BMW OF NORTH AMERICA, INC.

Release wiring harness from cable channel.

Release screws (1).

Release lock (2).

Remove cable channel (3).

Remove soundproofing (4).

Fig 3: Identifying Cable Channel, Lock And Screws
G09925649Courtesy of BMW OF NORTH AMERICA, INC.

Unlock connector (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 set of special tools.

Fig 4: Identifying High Pressure Sensor, Rail And Connector
G09846795Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check fuel system for tightness.

Check function of DME.