The E60/1 5 Series is renowned for its sure-footed handling and its exceptional build quality. But brake rotors on bigger cars can easily become thin, reducing their effectiveness. To ensure the braking performance of your 5 Series is upheld, we recommend replacement with Zimmermann discs. As an original equipment supplier to BMW, Zimmermann's discs are manufactured to the highest standards in Germany and come with their own Z-Coat to prevent the common problem of surface rust.