I've got a vectra sri140 and the front passenger side disc keeps warping and causing really bad vibration, i've changed the discs 3 times along with the pads and it still does the same within about 2000 miles the vibration is back again!

Anyone suggest anything it could be and how to sort it??!

And i know its a vauxhall before anyone says that!!!!!!

 

could be a dodgy caliper or bent bracket.