Brake pedal pulsation on your Audi A6 C8 is often disc thickness variation or uneven pad deposits, not always a truly warped disc.
Here’s what to check and when it’s safe to drive.
What is really causing that pulsation
On an Audi A6 C8, a brake pedal that pulses or kicks back under braking is usually the front brakes talking to you. The common phrase is warped discs, but in reality most cases are disc thickness variation or uneven pad deposits. Hard stops followed by holding the car still with hot pads can leave a patch of friction material on the disc, and that high spot makes the pedal throb as the wheel turns. True lateral runout from a dirty hub face, a sticking caliper, or a worn wheel bearing can do the same, and the A6's weight makes it easy to feel.
