The E46 3 Series has a reputation as one of the greatest BMWs ever produced due to its exceptional braking and handling. But when the discs become thin and worn, their effective braking performance diminishes. We recommend replacement with Zimmermann brake discs. Zimmermann are an original equipment supplie of braking components to BMW, and come treated with their special Z-Coat anti-corrosion technology that prevents the usual unsightly surface rust from appearing around the hubs. Made in Germany.