HELP!!!! Inactive Suspension that wont go back up...

[James 4.8is]

Well, it looks like we’re on the same boat! Went for a 4wheel alignment and after that I have the same message in my display tried all the fuses. All are ok, relay in back ok, but came across there is another relay under the air supply tank under the spire tire. Will be checking that today! If ok there is only one thing left. The ECU AIR SUPPLY CONTROL UNIT ($800 white box) in back where the spear tire is. Will keep you informed! P.S. Did you get yours fixed and if so, what was the problem?

[Blue4.8is]

Originally Posted by James 4.8is

Well, it looks like we’re on the same boat! Went for a 4wheel alignment and after that I have the same message in my display tried all the fuses. All are ok, relay in back ok, but came across there is another relay under the air supply tank under the spire tire. Will be checking that today! If ok there is only one thing left. The ECU AIR SUPPLY CONTROL UNIT ($800 white box) in back where the spear tire is. Will keep you informed! P.S. Did you get yours fixed and if so, what was the problem?

James, very interested in where this relax under the air supply tank is. could you please point it out? I found a relay for the air suspension in the truck right side compartment by the fuses ( relay #6 according to realoem ) but could not locate any other relay that you are talking about.

PS. It seems that the X5s with the air suspension in the rear only have the relay right on the air compressor but not for FULL air suspension such as my 4.8is

[James 4.8is]

Originally Posted by Blue4.8is

James, very interested in where this relax under the air supply tank is. could you please point it out? I found a relay for the air suspension in the truck right side compartment by the fuses ( relay #6 according to realoem ) but could not locate any other relay that you are talking about.

PS. It seems that the X5s with the air suspension in the rear only have the relay right on the air compressor but not for FULL air suspension such as my 4.8is

Sorry, for the wait. It’s not under the pump. It’s beside the battery on the right side to rear side under a black plastic panel. Hidden from everyone. (WHY? ) And as for the price of the BMW PC hook up it depends on how well you know your service department at BMW. I paid 500:-Swedish Kroner (about $80.00) He reset and recalibrated the hole system. And as a bonus I had him lower it! We took a standard ride height of 710mm (28”inces) at all 4’s. Then we took a lowered ride height of 680mm at all 4’s (26 ¾ inches) then we raised it back to the standard height and manually set the values to fool the system to 740mm at all 4’s (29 1/8 inches) so the system thinks 680mm is the standard ride height of 710mm so my standard is now 680mm! And my 4x4 ride height is 710mm and lowered all the way down to 650mm. “OBS” These are my ride heights! Yours may vary from these! So do your own measuring to find yours.
To sum things up:
4x4 height: OEM: 740mm Mine: 710mm
Standard OEM: 710mm Mine: 680mm
Lowered OEM: 680mm Mine: 650mm

P.S. make sure you are on level ground!
Use an alignment rack to do this!!!
We took the measurements from the wheel arch to the lowest point of the rim!

P.S.S. BMW online WDS: WDS BMW Wiring Diagram System - X5 E53

[Blue4.8is]

Cant find that black box...

[James 4.8is]

Originally Posted by Blue4.8is

Cant find that black box...

It should be under this "BIG" black box! You cannot miss it! Lol...