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rjpiselli
10-19-2016, 03:11 PM
2000 a4 Quattro. Auto, 2.8. This is whining for the first few minutes after startup, is located on bottom of engine in the front by passenger tire; just in front of the alternator. It has plastic hoses running to it and an electric connection.

http://uploads.tapatalk-cdn.com/20161019/8c2209750ff524442ac009b737b1745e.jpg


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MetalMan
10-19-2016, 03:33 PM
Secondary Air Injection (SAI) pump. It's to help the catalytic converter(s) come up to operating temperature faster after a cold start.

rjpiselli
10-19-2016, 04:23 PM
Thanks!


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CoyneJ
10-19-2016, 05:39 PM
Aka useless hunk of shit