As our workshop is on the south coast and many of our customers live by the sea, we get to see more corrosion problems than usual. This 2009 Renault Mégane had a rough feel to the brakes and the owner was concerned that it might be serious. Because it was exposed to the elements when parked, corrosion was blighting the rear brakes and causing the rough feel to the brake pedal. A new set of rear discs was required, but with the M´gane this has an additional expense.
The hub bearing sits directly in the rear brake discs, so reusing the old bearings for the new discs is time-consuming and can be unsuccessful. The new brake discs can be supplied with the bearings fitted and this is a far better option. It is more expensive than just replacing the discs, but avoids a large chunk of labour.
The new brake discs come complete with bearings, pushing up the cost.