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I'm replacing my secondary air pump and was wondering if this part is shared with other BMW models or is the E39 pump specific to our cars. I found one for a good price out of an E46 but want to make sure it will work for me.
 

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Vacuum pump sound on M5 e39

Hi i need some help .. my beast has this pump that start up in the moring with a cold start if go's on for like a 60 sec and then go off it use to have this hight pitch soud like a Vacuum and now the sound change a few weeks ago ist a lower pitch sound and somtimes sound like its having a hard time trying to make the noise now i want to know is the pump on its way out or could it be someting els please help
 
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