Porsche Enthusiasts Club Forum

Hi folks, hoping for a bit of guidance here.
Driving out for the MOT today ( passed, with a couple of advisory notes), I’ve noticed a high pitched whine when driving. It disappears when sat idling, so I don’t think it’s engine related, but reappears as soon as I drive away.
I’m hoping it’s a dragging brakes or similar, I have seen notes about air injectors / pumps causing this type of noise?
Any thoughts.
Many thanks

Not sure if its the same but in my case it was water pump on way out.