This listing is for a set of front and rear brake calipers and rotors for a BMW E39 M5. The calipers and rotors are original equipment manufacturer (OEM) parts and are compatible with model years 1998 through 2004. These brake components are designed for use on the left and right sides of the vehicle and can be mounted on the front or rear. The part number for the calipers is 34112229381, and the part number for the rotors is 34112229382. This set of brake components is a great choice for those looking to upgrade the braking performance of their BMW E39 M5.