Quote:
Originally Posted by tonupkid
What is this secondary air pump for, what does it do?
I have a slight whine on mine, that I've always put down to the PAS reservoir being so hidden as to not get checked during regular services. (I make certain that they check it, but the former owner will not have). Perhaps this is the thing that's causing it. D3 S8
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That's how my suspicions started, thought it was the PAS pump and then realised it wasn't when it got worse and I researched it.
Get it replaced before it gets worse, it's not an expensive job
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Audi D3 S8 - 2007 - V10. B&O, Phantom Black, black and silver interior, and still completely standard with everything working as it should
Audi TT - 2015 - Ultra