I`ve had a few problems with my car but touch wood(head) its been good of late...however when switching off I`m sure I used to here a very quiet buzzing (water pump) but I never seem to here this anymore??? Is it broken or do they only work in the summer when its mega hot??? I had the cooling fans & fan ecu replaced a couple of months ago-maybe linked-not sure if its a fault or nothing to worry about...could anyone else with one have a quick listen for me when they get in from a run??? Thankyou