Arnott has teamed up directly with WABCO to supply you with the same OE part at a fraction of the dealer cost. These compressors are made by the same supplier used by BMW. Arnott now has the one-stop solution for those who prefer the original equipment. This same compressor assembly will cost you more than you care to pay at your local BMW dealership! This is just the compressor and dryer assembly. You will have to reuse your intake lines, mounting brackets, and plug. This new compressor comes with detailed instructions. This compressor is ONLY for vehicles equipped with rear only air suspension.