Rob1984

Hi new to this just purchased a used cat n fabia mk 3 1.4tdi 90ps 2015 and had done 44k wondering if any one knows an odd intermittent noise hopefully is covered by the warranty it's a high pitched grinding possibly something metal rubbing. he fitted a new exhaust and back discs and lads as they were catching but this was fine for 100 miles or so then started doing it at low speeds il try to attach a video it is hard to locate seems to be at the rear maybe a wheel bearing or cv joint any help would be great thanks .