I hope this is an exception.

My brakes would pull to the right as I applied them so I read all the posts here.
1)Checked and made sure there was no air in the lines.
2)Checked the run out on the disks.
3)Decided to swap the pads from right wheel to left, so looked at the M3 and came to the conclusion that I could remove and replace the pads with the wheels still on and have better access if I took out the fenders\mudguards.
Took the bolts holding the support bar from the tie rod to fender off and that support bar fell loosely. I looked at the nyloc nut and it was visually about a 1/4" loose.
Shook the tie rod and it was clearly moving. I tightened the bolt took the M3 for a road test and perfect. Also the wondering that I thought was the nature of the beast has gone.
This is concerning as to why the bolt was loose, hopefully no one else's is.