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 71 150 Removing clean air pipe (N55)
Necessary preliminary work
- Remove ignition coil cover.
Release clamps along line (1).
Release clamp (2).
If hose clamp is tightened with a higher tightening torque, there is a risk of damage to the fresh air hose!
Tightening torque 13 71 3AZ .
Unlock connector (3) on hot film air mass meter and disconnect.
Release upper section of intake silencer housing (4) at rear from clamps and remove in an upward direction.
Release screw (2).
Tightening torque 13 71 5AZ .
Unlock plug (4) from heating element and disconnect.
Do not detach vent hose at cylinder head cover. Risk of damage to cylinder head cover!
Undo screws (3) at clean air pipe (1) and pull vent hose off from clean air pipe!
Release screw (5).
Tightening torque 13 71 7AZ .
Feed out clean air pipe (1) and remove.
Assemble engine.
NO RELATED
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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.