BMW 7 Series: Replacing Air Supply System
IMPORTANT: Risk of injury! Drain the air spring system before carrying out any work on the air supply unit, air pipes and air spring struts! 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.
Necessary preliminary tasks
- Deactivating air spring system:
- Raise vehicle on lifting platform.
- Remove ignition key
- Pull out fuse for air spring system in luggage compartment at rear right
IMPORTANT: Do not kink, twist or crush lines.
Unscrew nuts (1).
Release screws (2).
Lever out expander rivets (3) and remove panel (4).
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Fig. 136: Identifying Airsupply Unit Panel With Screws, Nuts And Expander
Rivets
- Unlock plug connections (1/2) and disconnect.
Carefully slacken banjo bolt (3) and (4) until the sound of escaping air can be heard
NOTE: Wait roughly 2 minutes until the pressure on the left side and/or right side of the air spring system is completely reduced (hissing sound stops).
Line (3), air spring strut, left: Blue
Line (4), air spring strut, right: Red
- Only fully release banjo bolt(s) after pressure has completely reduced
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Fig. 137: Identifying Plug Connections And Lines
Installation:
- Replacement: Remove and dispose of screw connections on new air supply unit! Reuse screw connections on lines.
- Check banjo bolts for dirt, clean if necessary.
- 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.
Unfasten plug connector (1) and disconnect.
Disconnect ventilation line (2).
Release nuts (3) and remove air supply unit.
Tightening torque 37 22 1AZ.
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Fig. 138: Identifying Air Supply Unit Plug Connector, Ventilation Line And
Mounting Nuts
Activating and filling air spring system:
- Insert fuse in corresponding slot in fuse box
- Set vehicle down on its wheels
- Start engine
- Air spring system is automatically filled
READ NEXT:
Replacing Ventilation Line For Air Supply Unit
Necessary preliminary tasks
Remove REAR BUMPER TRIM
Detach ventilation line (1) in direction of arrow from air supply unit.
Unclip ventilation line (1) from holders.
Fig. 139: Locating Air Supply
Adjust Non-Dazzle High-Beam Headlight
WARNING: Danger of injury!
Laser radiation at headlight adjustment aid.
Do not look into the beam!
NOTE: The high-beam headlight must be adjusted to prevent dazzle in the
following
cases:
After re
SEE MORE:
Connection Diagram, Vacuum Activation (N63)
Fig. 462: Connection Diagram, Vacuum Activation (N63)
Connection (1) Black to exhaust flaps.
Distribute element (2), vacuum pump/vacuum reservoir (4).
Vacuum line (3) black to vacuum pump.
Vacuum reservoir (4) with three connections.
Connection, vacuum unit (wastegate), bank 2, cylinders 5 to
Draining And Adding Coolant (N63)
Notes
WARNING: Risk of scalding!
The repair work on the cooling system should only be carried out on an
engine that has cooled down!
IMPORTANT: Lifetime coolant filling:
Never reuse used coolant!
When replacing and removing components which rely on the corrosion
protection effect of the coolant, it
