13 53 596 Replacing High Pressure Fuel Sensor

13 53 596 Replacing high pressure fuel sensor (N53, N54, N54T)

Special tools required:







WARNING:
Observe warning on cylinder head cover.
Disconnect negative battery terminal (risk of fire due to short circuit on dismantling).
Electric fuel pump starts up automatically each time 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: 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 contamination before removing lines or separate components.
- Use only fluff-free cloths.
- Seal all fuel system openings with protective caps or plugs.







Necessary preliminary tasks:
- Remove acoustic cover







Recycling:
Fuel escapes when fuel lines are detached.
Catch and dispose of escaping fuel in a suitable container.
Observe country-specific waste disposal regulations.







Unlock connector (1) and remove.
Release high pressure sensor (2) and remove.
Tightening torque 13 53 3AZ with special tool 32 2 100.
Seal high-pressure rail (3) if necessary with a matching plug from the set of special tools 32 1 270 .

IMPORTANT:
If reusing:
The high pressure sensor may only be screwed back in 3 times.
Therefore mark the sensor with a blue dot each time it is screwed back in.







Assemble engine.
Check fuel system for tightness.
Check function of DME.