Does anyone know if it is possible to update the ECU to a different tire size. Installed New tires on MY 07 Sport pack and now getting an intermittent driveline noise at various RPMs and road speeds especially during cornering. Switched to Pirelli P-Zero Nero MS 245/45 18 front, 275/40/18 Rear. The tire diameter is 3% shorter than with stock tires and I'm sure the driveline noise is caused by Computer Thinking that I have taller tires. It is a weird noise that sounds like when the stability control kicks in. No dashboard lights though.

I go into more detail about this in my Bimmerfest thread. Here is a link

http://www.bimmerfest.com/forums/sho...d.php?t=188710

Any thoughts?