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  1. Chris_L@NZ

    S3 Rear Brakes - Serrated shim between piston and pad? Is this normal?

    Hello, I'm replacing rear rotors/pads on 2009 S3 8PA and when I removed the floating portion of the caliper and pads, there was this serrated shim or washer thing between the piston face and back of the pad. I've never seen this on a brake system before. It's not even same diameter as the piston...