Thanks, so I guess if I get the ECS kit that includes a new air pump then no point getting a used compressor to rebuild and have it as spare. The job doesn't seem hard, how long does it take to get the compressor rebuilt?

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4.8is 2004 imola red
4.8is 2005 Black on Black - DINAN/2 sold
4.4 2004 X5
2003 330xi
2008 328xi - sold
4.4 2000 X5 - sold