Vibration while braking
 

Greetings, I recently purchased a 2017 DB11 Launch Edition with 3000 miles on the clock. The brakes vibrate terribly when used. Tires were replaced with no improvement. I then installed new rotors and pads. It seemed a bit better at first but is doing the exact same thing again. The car has zero vibration while driving at all speeds, tracks perfectly straight and does not pull to either side under braking. Any thoughts on what may be causing this issue? Thanks!

- Edited - My message is no longer relevant, as it was just a typo from the OP

​​​​​​I mistakenly typed calipers instead of rotors. Original message is edited to indicate that I replaced the rotors and pads with no improvement.

​​​​​​I mistakenly typed calipers instead of rotors. Original message is edited to indicate that I replaced the rotors and pads with no improvement.

I wonder if it could be a sticky caliper...or return spring? Small stones have been known it get lodged in calipers. The noise it makes when breaking causes you think something terrible just happened!! I had a stone in mine years ago.

try some new rotors again. you said it improved after the first pair. it's easy to warp a rotor, if you're braking hard. it can happen in an instant. DIY. you should be able to install new front rotors for less than $200 if you don't insist on AM rotors. and they are no better than others, IMO. after all they've warped at least once already.

i had a bad vibration in a new-to-me vantage. it was in the steering wheel at speeds above 65mph. and because the car was 12 years old, had been sitting for a while and the tires were the same age as the car, i assumed they were flat-spotted. so i bought new tires. didn't fix it..... i spent a year and a lot of money trying to figure it out and it turned out that the new tires i bought weren't round! a second set of new tires did the trick. it happens.

Did you check run out on all brake rotors before replacing?

You can take them to a local machinist and have them measured and corrected if its not too bad.

Machine them on the car ..it’s cheap and quick

You really need to spend time diagnosing where the vibration is coming from. Firstly check disc rotor run-out to determine whether it is one side or both, or even the brake at all. THEN try rotating the disc on the hub one stud and try again. If that does not help, remove the disc and measure the hub run-out. You may well be blaming the disc when its actually fine but fixed to a distorted hub.
It should go without saying that all mating surfaces should be spotlessly clean as even the slightest corrosion or dirt build-up will cause your issue.

If you do this, you must really take very fine cuts because it is notoriously difficult to machine floating discs. Any side loading will cause disc movement away from the tool and make things worse.

Uneven bedding of new pads on the rotors can cause a similar issue, with new brake parts. Did you follow the proper bedding procedure as outlined by the manufacturer of the pads?