07 TDV8 with 59k on the clock, having to carry out the following:

Replace Front lower arm as bushes have play.
Replace D bushes on front anti roll bar due to knocking noise
Replace Compressor due to "C1A20-64: PRESSURE INCREASES TOO SLOW WHEN FILLING RESERVOIR"

The car is fitted with 22s.

keen to know if any of the aboveis exessive wear given the age and mileage of this car. I know the compressor fault could be one of many things such as leaks, blocked intakes etc but I'm not entirely sure if there is a wear item within the unit 07 TDV8 + BAS map

My 57-plate TDV8 has had the ARB bushes and the front arms replaced at a similar mileage. Compressor is slow but doesn't throw any faults (yet!). Strangely, the ARB bushes were done under warranty but the arms weren't.

The vehicle is fitted with 19s (and had 20s on previously). I think the fact that yours has 22s gives them an excuse to walk away from the suspension wear. Running with shorter sidewalls will increase the forces acting through the suspension bushes on uneven tarmac so could be argued (as I'm sure LR would argue) that the wear has been accelerated by incorrect wheels/tyres. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

they're willing to foot the bill for the arms but not the compressor (original dealer, not warranty)
its looking like i'll be left with the compressor bill :'(
so far both garages have recommended replacing the whole 500quid unit. neither have told me if the error relates to any of the other (cheaper to fix) component of the air suspension unit like a blocked/leaking pipe, sensor fault etc...they're both telling me the compressor is gone. that should be easy for me to verify right? i mean the car still raises and lowers via the central control button. i did recently experience the car fall flat on its stomach and wouldn't respond to the control button but it was fine the day after and has been since. 07 TDV8 + BAS map

Sadly it's a common problem with these cars. My RRS which has done just 52k miles also needs the front lower arms and bushes replacing , hopefully that will get rid of the knocking noise.  2014 L405 SDV8 RR Autobiography

2012 RRS SDV6 HSE -Orkney Grey with A/B bodykit - Now Gone
2007 RRS TDV6 HSE - Zermatt Silver - Gone

Having larger wheels than the 20"s fitted at the factory will accelerate wear on suspension components

Need a few more details on the compressor issue though. I have seen many compressors misdiagnosed for other issues, like leaky airbags, pipework and reservoirs.

thats all the info i have on the compressor.
two separate indy's recommended replacing the compressor.
one said, its packed up and will fail any moment now
the other (who i trust more) said it will last but will just complain about the pressure rate until one day it packs up.

i find from my (humble) experience so far and the posts on here that this type of fault coupled with the fact this is a known common fault that the first set of units that came fitted were bad, all amounts to free money for mechanics "compressor. kaputt. replace. £££. danke"

i feel like i could ask, is it really the compressor, can it be a leak elsewhere?
and they'll say "nope. compressor. kaputt. replace. £££. danke"

 07 TDV8 + BAS map