2020 Audi A4. 2016 Audi A4 FWD. 2010-2015, 2017-2019 Audi A4. 2009 Audi A4 Sedan. Zinc Plated Black For Rust Protection On The Rotor Hub, Vents, And Edge. Position: Rear Right. 100% Precision Cut And Mill-Balanced For Smoother Stopping And Zero Vibration At Any Speed.