Replacing Low-Pressure Fuel Sensor

13 53 594 - Replacing low-pressure fuel sensor (N54/N53)





Special tools required:
- 32 1 270 32 1 270 Plugs (Set)





Warning!
Disconnect battery negative terminal Disconnecting and Connecting Battery Negative Lead (risk of fire due to short-circuiting on removal).

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.





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.





Necessary preliminary tasks:
- Remove intake air manifold Service and Repair





Recycling:
Fuel escapes when fuel lines are detached.

Catch and dispose of escaping fuel in a suitable container.

Observe country-specific waste-disposal regulations.





N53 only:

Lay exhaust gas recirculation (1) upwards to one side.Do not remove.





Unlock plug (1) and remove.

Release low-pressure sensor (2).

Tightening torque 13 53 4AZ 13 53 Fuel Injection Nozzles and Pipes.

Important!
When releasing and tightening down sensor, grip at width across flats of low-pressure line (3).

Note:
Seal low-pressure line (3) if necessary with a matching plug from special tool kit 32 1 270 32 1 270 Plugs (Set).





Assemble engine.

Check fuel system for leaks.

Check function of DME.