alright bring up a old thread because I have the same issue. I tried road force balancing which helped but still some vibration there. Tried new wheels and tires. I notice most of the complaints are from older cars. My guess is wheel bearing a getting loose. I think they are still in spec range but like everyone says sensitive suspension. I taking the plunge and ordered new bearings since my car is @ 75k. I'lkl just consider this part of proactive maintenance. ($439 shipped from Turner MS, both fronts) My next bet is the tension rod control arm bushing. I plan also replacing that later date.
If anyone has new insight please add it here.
///M3... Don't want more power, Just want it to turn sharper one step closer each time. Ohlins RT, Vorshlag plates, RD sways, Alekshop subframe bushings, Monoball, Adj. Toe link, Full Evo Akra, ESS tune, SSK.