Q7 Whining noise when turning the wheel

PaddySR

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Hi all,

First time Audi owner here. Picked up a 2007 Q7 and it has started making a whining noise when i turn the steering wheel, it happens both stationary and when running but is less pronounced the faster the car is going.

I’ve done a bit of a Google and seems the two options are either the power steering pump or the alternator tensioner.

Just looking for a bit of advice if possible to help me rule out one or the other.

If I was to describe the sound it is like a bus accelerating.

Thanks in advance