The R1 Concepts drilled brake rotor for 2003–2008 BMW Z4 (rear left) is a vehicle-specific replacement finished in black and featuring a drilled braking surface for service or upgrade use. Designed for the rear-left position on compatible Z4 models, it replaces worn or damaged rotors during brake maintenance and restores a matched braking surface across the listed model years.

R1 03-08 BMW Z4 Rear Left Drilled Black Brake Rotor