Quote:
Originally Posted by FieldingMellish
Noticed recently, when I drive without music on, I can hear a strong hissing noise which seems to come from around the centre of the dash, and no it isn't the air-con! It increases as I speed up, I think it only happens when the engine is on and the car is moving. Hissing is the best way to describe it but I suppose it could be some other mechanical-related sound. Anybody else experienced this? Normal?
EDIT: It also happens when the car is out of gear and the engine revved.
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What sort of mileage is it on?