depending on the model, I think you will find that the genuine parts are not that expensive as compaired to "after market", infact I priced E30 discs & pads from repco & they were more expensiveHere is also an interesting fact , For the five years that I was involved with BMW, the "ONLY" times we saw people with brake problems such as warped discs, smokeing pads, brake faid etc, EVERY TIME, with out fail, it was after market items fitted, hence, we only ever fitted genuine