Hi
As the other guys have said ,
Plus , can highly recommend to have the oil pump cover replaced ,is a must from 2007
Cost are £132 for the part
https://www.advancedfactors.co.uk/lr076782-oem-fomoco-oil-pump-27-30tdv6-c2z31680-922725-p.asp
Plse make sure it’s done when front and rear belts are replaced , ensure the tensioners are also done, aux belt , also pays to have the water pump replaced at the same time seeing it’s apart
Garage at the most will be £1,400 for everything to be done , average price is around £8-900
Belts are done every 105,000 miles or 7 x years
Suspension compressors normally fail because of an air leak or the incandescent silica has turned to dust which blocks the filters and prematurely burns them out
Also done a buyers guide which I hope will help
https://www.landyzone.co.uk/land-rover/buyers-guide.312800/
If u put a shout out on the D3 forum there are some fantastic mechanics who can do the job and come highly recommended
https://www.disco3.co.uk/forum/
Hope that helps