Self level suspension problems

[X5E53John]

Thankyou to anyone that reads this and can help
So Im back here again after more problems with my beloved e53 i have the self level suspension which just controls the rear i have normal coil springs on the front.
The x started coming up with self level susp inact.
the pump would come on if i started the car and turned it off within a couple minutes before the error came up but once error showed itself the pump wouldn’t kick in
I had the car plugged in and scanned for codes only showed an error for the height sensor but the air bag on the opposite side was completely deflated
Bloke who plugged it in started the re calibration but exited it before completing as he noticed the completely empty air spring.
Since that the air compressor never kicked in again
So i changed the air spring and the one that seemed blown once removed seemed to hold air pretty well.
Started the car and no luck
I bridged the wires to force the pump on and it was working but i didn’t notice the x lift or inflate.
I don’t know what to do from here could it be the sensor still?
Possibly the compressor rings?
Compressor solenoid?
Or should i just go coil spring conversion?
If i go coil spring cobversion how can i turn off the self level inact error message ?
Thanks for any help i may get im really at a loss right now


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