The R1 Concepts drilled black brake rotor for 1999–2006 BMW 323i is identified for the rear-left wheel and features a drilled face and black finish as listed. The description includes the model and year range plus the rear-left placement. Select this rotor when performing rear-left brake service on compatible 1999–2006 323i vehicles; fitment is explicit in the source text.
R1 99-06 BMW 323i Rear Left Drilled Black Brake Rotor