REAR SUSPENSION FAILURE
Dont worry guys the heading is just to get you to read this.
Recently we have had GTVs/Spiders in with badly worn rear track control arm bushes (the track control arms are the ones which go outwards from the centre of the car to the hub, at right angles to the centre line of the car). Now these bushes come in new arms and are reasonably cheap to replace, however if they are not caught in time the arm shifts on the bush and carves its way into the Subframe, causing serious damage.
Replacement of the subframe is the only answer which is megabucks. So if you buy a used car, check the rear subframe and these bushes, and if you hear any noises from the rear save money and get it caught early.
Also it may be good to have your bushes checked every 6000 miles when you get an additional oil and filter change.