Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
13 53 332 Removing and installing/replacing feed line (N63)
Special tools required:
Electric fuel pump starts up automatically when door is opened!
Carry out installation work on fuel system only with coolant temperature below 40 °C.
Wear protective goggles.
Wear protective gloves.
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:
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 clamps (1) and (2).
Replace clamps (2).
Detach both charge-air ducts (3) and remove.
Check gaskets on turbocharger, replacing if necessary.
Picture shows the left side, the procedure for the right side is identical.
Detach hoses (1) from clean-air pipe.
Release screw (2).
Tightening torque 13 71 1AZ .
Detach clean-air pipe (3) in direction of travel from turbocharger.
Check seal on clean-air pipe, replacing if necessary.
Unlock and disconnect fuel feed line (1).
Seal fuel lines with special tools 13 5 160 and 13 5 162 .
Unlock and disconnect plug (2) on fuel low-pressure sensor.
Release fuel feed line (3) on high-pressure pump.
Tightening torque 13 53 4AZ .
Release bolts (4).
Tightening torque 13 53 6AZ .
Catch and dispose of escaping fuel.
Seal fuel lines with special tools (1) 13 5 160 and (2) 13 5 162 .
Release fuel feed line (1) on high-pressure pump.
Tightening torque 13 53 4AZ .
Catch and dispose of escaping fuel.
Release nuts (1) on retaining clips.
Tightening torque 13 53 7AZ .
Feed out and remove fuel feed line (2).
Installation:
Observe tightening sequence.
- Fit fuel feed line.
In so doing, tighten screw connections hand-tight only .
- Tighten down fuel feed line (1) on high-pressure pumps to torque (2) and with crowfoot wrench (3).
Tightening torque 13 53 4AZ .
- Tighten down lugs on fuel low-pressure sensor.
Tightening torque 13 53 6AZ .
- Tighten down retaining clips.
Tightening torque 13 53 7AZ .
Assemble engine.
Check fuel system for leaks.
Check function of DME.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.