OE & aftermarket replacement REAR brake pad set options for your Audi, ranging from the B9 S4 & S5 models and others where factory part #'s apply. Please note, on semi-metallic pads, dust will not be as low as the ceramic pads, but will perform well in all factory like applications. Replaces factory pads 8W0698451K & 8W0698451P & wear sensor 8W0615121E.