Gentlemen,

My RR's suspension is dropping over a 4,5 day interval if the car is not used. It drops uniformly on all corners, therefore I don't thinks it's a valve issue. The compressor seems to be working fine and there are no faults in the dash or error codes when using the iCarsoft diagnose tool.
Would it be correct to assume the problem is the air reservoir not holding pressure? If so, how do I diagnose it?
Thank you all in advance.

i have same problem have cheched all air bags and can see no bubbles when sprayed with soapy water.......?

hi it could be the air tank or could be one of the valve blocks behind the wheel arch covers 1 driver-side rear arch and 1 valve block drivers side front arch new vehicle purchase
2007 supercharged 4.2 java black .sand leather vogue se trim
previous cars .
range rover classic 200 tdi
discovery 1 200 tdi
freelander 2 2008 hse
discovery 1 300 tdi
p38 4.0 ltr man r380 ex royal support vehicle on v5c
discovery td5 man off roader

Thank you, Oggy.

How does this system work, basically? The compressor pumps air into the reservoir, which then sends air to both valves, each with its two bags. What holds the pressure in the bags? I'm assuming the valves do.
If that's correct then the reservoir is not the issue.
Would you agree?

yes cosmin i would agree with that new vehicle purchase
2007 supercharged 4.2 java black .sand leather vogue se trim
previous cars .
range rover classic 200 tdi
discovery 1 200 tdi
freelander 2 2008 hse
discovery 1 300 tdi
p38 4.0 ltr man r380 ex royal support vehicle on v5c
discovery td5 man off roader

my air tank had a small rust hole in so changed tank but it still does it ................think all 4 of my air struts are original

Thank you gents.
I'll order the valve oring kit and compressor repair kit to see if that solves the issue.
Will update asap.