I hope someone can help. My 2003 M3 has an ultra sensitive wheel speed sensor lasts for approx 2 weeks then comes on when 1 tyre looses approx 1/2 psi. But this is not my problem which is that just prior to the warning light coming on, a vibration appears like a buzzing sensation I think from the front end as I seem to feel it through the steering. It’s quite alarming. I have had the car checked for fault logs but nothing comes up. The vibration goes away after around 1/2 mile or if I stop. I then check the tyre pressures but no problem. Reset the tyre pressure sensor and the car drives faultlessly until the warning light comes on again then the vibration returns! Has anyone had a similar problem with any pointers to the cause of the problem? Any help would be much appreciated. Thanks in advance.