The R1 Concepts drilled brake rotor for 1999–2005 Audi A6 Quattro (rear left) is a black-finished replacement rotor intended for the rear-left wheel. This drilled rotor corresponds to the broader A6 Quattro application noted and provides a serviceable replacement option for maintenance, allowing owners to restore proper rotor fitment and keep braking components compatible across the supported A6 Quattro years.

R1 99-05 Audi A6 Quattro Rear Left Drilled Black Brake Rotor