[m6-lt1]

I had this issue on my 2016. I had 1le wheels and stock 4 piston brakes. Kept getting light vibration when braking lightly. Replaced multiple rotor sets and had them installed by shops each time until the final set. What I believe finally fixed my issue (unfortunately didn’t put more than 1000 miles on it before trading for my 1le) was I replaced the wheel hubs.

Do you also have light vibration when not braking? If so that could be the issue. I don’t believe the shops actually took all the rust off my wheel hubs prior to installing rotors each time simply because it was not possible to take it all off. When I did the work myself the final time I found the hubs were so rusty that unless I went at them with a hammer and chisel the rust was not going to come off. If the rotors don’t have a flat surface to rest on they will begin to vibrate after not very many miles.

I left my car on jackstands and ordered new wheel hubs. My vibration when not braking finally went away (as did the braking vibration). If you tend to wash your wheels and then let the car sit for a long period of time before going for a drive yours could be too rusty for all of the rust to be removed.