37 22 540 Replacing Air Supply Unit

WARNING: This page is about a different car, the 2010 BMW X5, 2009 BMW X5, 2008 BMW X5, and 2007 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Danger 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.

NOTE: Read and comply with notes on air spring system. See 37 00 ... Notes on Air Spring System

Necessary preliminary tasks:

Deactivate and empty air spring system. See 37 00 100 Draining/filling Air Spring System
Remove right underbody panelling. See 51 47 ... REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT UNDERBODY PANELLING

IMPORTANT: Do not kink, twist or crush lines.

Disconnect plug connections (1-3).

Disconnect quick-connect coupling (4) and seal both lines with adhesive tape.

Fig 1: Identifying Quick-Connect Coupling And Plug Connections

Courtesy of BMW OF NORTH AMERICA, INC.

Release banjo bolts (1, 2).

Lay pipes to one side and seal off with adhesive tape.

Installation:

Check banjo bolts for dirt, clean if necessary. Then carefully screw in banjo bolts by hand to avoid damaging the plastic threads and with it the air supply unit.

Tightening torque, see 37 12 1AZ in 37 12 CONTROL AND SUSPENSION SYSTEMS, REAR

Fig 2: Identifying Banjo Bolts

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew nuts (1).

Remove air supply unit (2).

Installation:

Replace self-locking nuts.

Tightening torque, see 37 22 1AZ in 37 22 PUMP UNIT WITH RESERVOIR

Fig 3: Identifying Air Supply Unit And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Activate and fill air suspension system. See 37 00 100 Draining/filling Air Spring System