I had my Celsior MOT 8 weeks ago which passed without an advisory, in the past 4 weeks I've had a knock driving over bumps, it appears to have started at the front but now it's the rear as well, in fact the rear seems to be the loudest. I've just come back from the garage where we had it up on the ramp but all joints/bushes are good. The mechanics suggestion now is strut top mounts. Has anyone had experience of the top mounts causing a knock?