Hello,
please help us. We have had our subaru impreza turbo 2000 for just over a month now and we have noitced a buzzing noise. This noise happens in fourth gear at about 1800rpm to 2000rpm. This noise sounds possibly like the heat shield vibrating. Has anyone had this problem and can let us know what it is please?

 

you've most likely hit the nail on the head.................various h/shields can cause this, most common are the ones on the headers at the front and the catalyst ones..................its difficult to be any more specific by your post

alyn