Arnott's air suspension compressor P-3304 for the 2004-2010 VW (7L), 2007-2015 Audi Q7 (4L) and the 2003-2010 POrsche (9PA) is a direct replacement for the original OE compressor. The compressor comes complete with a mounting bracket, integrated air dryer and electrical connectors for a fast plug and play installation. The most common cause of compressor failure is a leak in the air suspension system such as the rubber air springs.