Hi I have an 07 LR3 , 90k miles.. When it sits for over night the suspension always drops down to access jeight... It never used to do this until recently... It seems to be leaking down and the dealer wants $200 to keep it overnight and test it... Not sure if it's the compressor...n Any ideas or suggestions

 

Get the serial number off of the air compressor. The early ones had a design flaw in the exhaust valve. Atlantic British sells the updated compressor. Disclaimer: All of this is an educated guess without proper diagnosis. However, I have replaced several compressor assemblies for this failure.

 

Did you fix it? I have the same issue.

 

Seriously? This is from 2012. But the issue is probably valve blocks. If they leak into the galley the system will lower. If the reservoir block is leaking there is no reserve air to raise the system during sleep mode and I think that can cause a drop since it will command the bags to open epxecinwt to adjust/raise them with reservoir air when there is none.

If you pull he EAS fuse overnight and the system does not drop, then its probably a leaking center block for the reservoir. If it still drops, then its probably front and or rear valve blocks since they should be closed/sealed all night, so if there is a drop they are leaking into the main gallery which is not air tight. Could also be a leaking bag. To test a bag let it sit overnight at off-road height instead of standard.