In the market for a Q7 for our growing family. Found a couple locally, one for a pretty decent deal but owner says it needs a new oil pump. It's a 4.2.

Can any of you shed light on what replacing the oil pump entails? I'm not stranger to Audi's or fixing them, but I've not owned one with the 4.2 before and I've never had to replace the oil pump before.

Thanks in advance!