37 22 540 Replacing air supply unit (two-axle ride-height control)
WARNING: This page is about a different car, the 2006 BMW X5, 2005 BMW X5, and 2004 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! The vehicle must not stand on its wheels when the air spring struts and air springs are depressurized! Otherwise the air spring struts and air springs will be damaged and later destroyed during driving!
Risk of damage! The vehicle must not stand on its wheels when the air spring struts and air springs are depressurized! Otherwise the air spring struts and air springs will be damaged and later destroyed during driving!
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.
Risk of damage! The vehicle must not stand on its wheels when the air spring struts and air springs are depressurized! Otherwise the air spring struts and air springs will be damaged and later destroyed during driving!
Risk of damage! The vehicle must not stand on its wheels when the air spring struts and air springs are depressurized! Otherwise the air spring struts and air springs will be damaged and later destroyed during driving!
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. Refer to 37 00 ... NOTES ON AIR SPRING SYSTEM .
Necessary preliminary tasks:
- Venting pressure accumulator:
- Raise vehicle on lifting platform
- Connect BMW diagnosis system
- Switch ignition on
- Vent pressure accumulator using the BMW diagnosis system (control unit functions -> component activation: activate menu item "Vent pressure accumulator" once)
- Deactivating air spring system:
- Remove ignition key
- Pull fuse for control unit
- Remove spare wheel/emergency wheel
- Secure removal aid to luggage compartment floor trim panel
- If necessary, remove baseplate for emergency wheel
Disconnect plug connection. Press pipe connection into distributor and pull out pipe. Remove plug housing with distributor from mounting bracket.
IMPORTANT:
Risk of damage! Do not kink, twist or crush pipes.
Release screw (1). Expose wiring harness with pipes up to air supply unit. Unfasten screws (2). Remove air supply unit (3) with wiring harness and pipes.
After installation:
- Activating and filling air spring system:
- Insert fuse in corresponding slot in fuse box
- Connect BMW diagnosis system
- Switch ignition on
- Fill pressure accumulator using the BMW diagnosis system (control unit functions -> component activation: activate menu item "Fill pressure accumulator" once)
- Set vehicle down on its wheels