hi dont drive the wifes corsa 'c' 2001 car that much she has been complaining vibration through the steering wheel when she goes over pot holes or speed humps etc.. and has a bit of play in the wheel. bearings ok. went to get somes tyres changed today when the guy who changed my tyres drove the car he said steering cups need changing and its a common problem? never heard of steering cups before 1st off where are these located? how much would this cost? and what should i expect to pay to get this done cheers!