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The EBC rear brake wear lead sensor kit for 2017–2020 Audi A4 (B9) monitors pad condition to help prevent rotors from being exposed to metal-on-metal contact. This sensor kit is matched to FMSI pad number D1898 and is available for both vented and solid rotor configurations with five bolt holes. It provides a straightforward replacement for the rear brake pad wear sensing circuit.
EBC 17-20 Audi A4 B9 Rear Wear Leads
