The R1 Concepts drilled black brake rotor for 2005–2018 Audi A3 rear-left applications matches the rear-left position described for those years. The catalog listing identifies a drilled design and black finish, making it the specified rotor for rear-left service or replacement on the noted A3 models. Confirm year and side to ensure proper compatibility.

R1 05-18 Audi A3 Rear Left Drilled Black Brake Rotor