Hi! So my Z has close to 73k miles.
It got new brake pads all around at 67,200 miles.

So whenever I drive my Z it's usually fine but as soon as I hit a bump *happened this morning after going over train tracks* the rear brakes start making a whirring/squealing sound that gets quiet as I drive slower and stops when I completely stop the car and usually it doesn't happen again until the next bump; could my brake pads already need replacing?

 

dust shield hitting rotor?

 

Check the brake pads and dust shield. It also might be worth checking the 'other stuff' that spins while the car is rolling (axles, driveshaft, etc..)

 

Got back from the shop.
So my brake pads are supposed to only have 5k miles on them according to maintenance receipts.

My rear passenger brake pad was seized up and horribly worn down
Front brake pads were 10-15%
And only the rear driver side brake had the typical wear for 5k miles


Sooooo odd and lame!