37 12... Replacing pipes for air springs

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WARNING: Risk of injury!
Drain the air spring system before carrying out any work on the air supply unit, air pipes and air springs! Danger of injury if this instruction is not complied with!
Risk of damage!
Extreme cleanliness must be ensured in the connection area of the pipes during removal and installation. Even the smallest of dirt particles can cause leakage in the air spring system.

IMPORTANT: Do not kink, twist or crush new pipes.
To avoid leaks in the air spring system, it is essential to avoid scratches on pipes in particular in the connection area!
Line, air spring, left: "Red"
Line, air spring, right: "Blue"

Pipes must have sufficient clearance to adjoining components!

Necessary preliminary tasks

Deactivate air spring system
- Raise vehicle on lifting platform.
- Pull out fuse for air supply unit in luggage compartment at rear right
Remove REAR WHEEL

Release nuts and screws.

Remove trim (1).

Fig 1: Identifying Trim

Courtesy of BMW OF NORTH AMERICA, INC.

Draining air spring system:

Carefully slacken screw connections of pipe (1) and (2) until the sound of escaping air can be heard.

NOTE: Wait approx. 2 minutes until the pressure on the left and/or right sides has decreased completely (hissing stops).

Tightening torque, 37 12 1AZ

Fig 2: Identifying Pipe Connections

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Remove AIR SPRING and disconnect pipe (1).

Fig 3: Identifying Banjo Bolt And Pipe

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IMPORTANT: It is not permitted to cut open the protective gaiter to feed through the pipe (with banjo bolt)!

Installation:

Seal pipe (2) with adhesive tape.

Thoroughly clean opening in protective gaiter (1).

Insert pipe (2) through opening in protective gaiter (1).

Install new SCREWED CONNECTION .

Fig 4: Identifying Protective Gaiter And Pipe

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Pipe routing, left (red pipe) Pipe routing, right (blue pipe).
Disconnect pipes from air supply system (1). Observe holder position and bending radii without fail.

Pipes must run parallel and have sufficient clearance to adjoining components!

Seal connections of air supply system and air spring strut with adhesive tape.

Unclip pipe from holder (see arrows) and remove.

Fig 5: Locating Air Supply System Pipe Holder

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Install new SCREWED CONNECTIONS .

Carefully screw in banjo bolts by hand to avoid damaging the plastic threads and with it the air supply unit.

Tightening torque 37 12 1AZ .

After installation

Activate and fill AIR SPRING SYSTEM