The "tire defect" issue seems to have resolved its self by resetting the system. So that's good.
Having the week of the 4th of I decided to get up early one day and take the car for a bit of a joy ride to test out my new camera. I recently picked up the Canon 5D Mark IV to replace my 5D III.
If anyone is into photography we can go way down that rabbit hole but all in all the camera is awesome. I think it actually takes sharper photos than my 1DX.
Between the Leavenworth drive and my joy ride, the M5 has seemed to develop a bit of a shake under braking, especially heavy braking.
I've read pages and pages of forum conversations and it seems to come back to thrust arms and "warped rotors", which I know is a myth of sorts. let's call it the simple way of saying uneven deposits on the pads, a potentially stuck caliper or some other brake issue.
This morning I reviewed the documentation I have on the car, and got under it and checked the thrust arms. They and the bushings seem to be fine. no twist or play. Also knowing that the suspension had a total overhaul in 2016, and the car has had less than 10,000 miles put on it since then, I'm inclined to believe its brake related.
Going to pick up some OEM pads and rotors this week and see if that resolved the issue.