as follow up on my previous post, my Indy took my car to the RR dealer, because he couldn't find a solution to the suspension problem. Now the dealer told him one can not replace just one side, you have to replace two or all four. They also found out that when they turn the steering wheel to the right all four suspension airbags empty themselves and the body is on it's wheels. So there must be a leak in my opinion. My indy at the end of his wits, the dealer trying to get me change all four.... Any idea's PLEASE HELP

Link to your other post:
http://www.fullfatrr.com/forum/topic49323.html

Never heard that from a dealer before (yes replace both sides / as a pair on the front because of the shock absorber but not for air suspension reasons.)

Your indie needs to do some detective work:

Compressor functioning correctly
Air reservoir holding pressure at correct value
Leaks in pipework / valves /connections (to new bag?)
Leaks in other airbag/s (or new one!)
Height sensors all correct, working and in correct position (e.g. not 180 degrees out)

Decent tool for calibration of ride heights and resetting/clearing of faults / config (you mentioned a "Pro Tool", what Pro Tool ???) .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Thanks Joe.
compressor OK at 12
seem to be no leaks in airbags
have replaced relay (they had a C1A000 code)

height sensors are OK according to software,

will ask him tomorrow to check pipework/connection on the new airbag

The pro tool I've seen there is a programm on their garage computer where they can enter individual ride height and all the rest I've seen on the OBD tool one of the sponsors on here is selling. Don't know what the name is of their tool.

A leak wont cause a sudden drop to the bump-stops. However failure of more than 1 height sensor will trigger an immediate drop to the bump-stops, as will implausible articulation derived from all 4 height sensors which could be caused by a height sensor producing an apparently valid signal.

Thanks greameS,
do you know how one can check an apperently faulty height sensor, that gives a valid signal?

Just FYI on my 12 the dealer replaced one side only when an airbag went.

From a shock absorber point of view they should generally be replaced in pairs, but from and airbag POV then just fix the bust one.

Made the argument to my dealer when they replaced my burst bag, but was told that there was no need to do the pair..... There is nothing that can't be fixed with a hammer😜😜
FFRR 4.4 SDV8 Autobiography Santorini Black.
Fiat 500x 1.4 multiair Lounge 2015
2010 LR D4 Commercial 2.7 TDV6

^^^ does depend on the age of the vehicle

I'm with Graeme S on this, does sound like a height sensor issue of some kind .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

The implausible fault wont indicate which sensor otherwise the system would simply ignore that sensor. If turning to hard lock causes the dropping and assuming that no fault codes exist for 2 specific failing sensors then monitoring the actual height values with a diagnostic tool as lock is slowly increased might (should?) show a corner changing height significantly when the others don't change much.

Goodmorning,
Thanks guys, I'll go down to the garage and have them search for a leak in the tubes and tell them to look in to the height sensor, keep you updated.