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Re: Front Right Disk circular groove. Causing squeal
sorry to resurrect an old thread, bt since there were no replies I thought I'd give you my thoughts.
From what your describing, it sounds as though you have either a badly worn pad, or you have something lodged between the pad and the disc, in both cases your looking at replacing the pads at least and depending how sever the groove is, then new discs may be required. The groove will most certainly come up as an advisory on your next MOT.
Currently in kevinr's garage:
2000 Renault Laguna