Need Help in North Dallas - Slight Vibration at 80MPH

I'm new to the forum. I bought a 2011 E92 M3 back in Feb 2024. Done a lot of PM on it from rod bearings, to valve covers and Vanos covers. Car is 100% stock. I've been dealing with what I believe to be a wheel vibration related issue at 80+ mph since I bought the vehicle. I've had the wheels rebalanced several times by different shops. Standard dynamic/alloy to road force. It's better but not completely gone. Went as far as having the wheels refinished to see if they were out of round. They were. Then bought one new wheel from BMW to replace the one that was way out of spec/could not be repaired. Even replaced the tires and took apart/inspected the front suspension to rule out any bearing/ball joint/bushing related damage. Nothing is loose/worn out. My car has the OEM 19" 220M wheels. What I need is a known good set of front wheels to rule out a wheel related issue. My ask is as follows.... if you live in the North Dallas Area (Dallas, Richardson, Plano, McKinney, Allen, Frisco, etc...) and have a known good set of wheels with no vibrations/oscillations at any hwy speed I will pay you $150 to let me mount them to my car. You'll be present the entire time. We will take a quick ride on 75 to confirm you don't have any vibration. Then move them to my vehicle and go out on the hwy for a quick run to 85mph. That will help me diagnose the issue. Prefer not to drop $3.5K on a new set of wheels without a definitive ruling on cause. I have a lift, ramps, low profile jack, torque wrenches, etc.. to facilitate in transfer/mounting for the test. I live in Allen. Please help a fellow M owner out.

apspeed wrote

I'm new to the forum. I bought a 2011 E92 M3 back in Feb 2024. Done a lot of PM on it from rod bearings, to valve covers and Vanos covers. Car is 100% stock. I've been dealing with what I believe to be a wheel vibration related issue at 80+ mph since I bought the vehicle. I've had the wheels rebalanced several times by different shops. Standard dynamic/alloy to road force. It's better but not completely gone. Went as far as having the wheels refinished to see if they were out of round. They were. Then bought one new wheel from BMW to replace the one that was way out of spec/could not be repaired. Even replaced the tires and took apart/inspected the front suspension to rule out any bearing/ball joint/bushing related damage. Nothing is loose/worn out. My car has the OEM 19" 220M wheels. What I need is a known good set of front wheels to rule out a wheel related issue. My ask is as follows.... if you live in the North Dallas Area (Dallas, Richardson, Plano, McKinney, Allen, Frisco, etc...) and have a known good set of wheels with no vibrations/oscillations at any hwy speed I will pay you $150 to let me mount them to my car. You'll be present the entire time. We will take a quick ride on 75 to confirm you don't have any vibration. Then move them to my vehicle and go out on the hwy for a quick run to 85mph. That will help me diagnose the issue. Prefer not to drop $3.5K on a new set of wheels without a definitive ruling on cause. I have a lift, ramps, low profile jack, torque wrenches, etc.. to facilitate in transfer/mounting for the test. I live in Allen. Please help a fellow M owner out.

Some of the info at these links might shed some more light on tire related and suspension related vibrations.
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https://www.m3post.com/forums/showthread.php?t=2153546
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https://www.m3post.com/forums/showthread.php?t=695222

Did you service the diff? I was getting a drive line vibration and it went away completely when I replaced the diff fluid with OEM BMW Saf-XJ +FM Booster Rear Axle Fluid 75W140 (83-22-2-282-583).

I had a vibration for a period of time which I thought was wheel/tire related. Upon inspection there was a chunk missing from one of my rotors. Thankfully it was internal in the vent of the rotor and not on the surface.