[Pete17]

Well I thought I was doing well, 8 weeks of owning my car and having to phone dealership on Tuesday to see if they can fit me in before the weekend. Out for a run up to York today, this is the first proper run it as had. Once up to motorway speed 70mph all I get is a whistling noise from driver door/ window. Music playing and can hear it in the passenger seat. We going on holiday at next week so lots of miles on the motorway.
I tried with the rear window down to eliminate that window. Has anyone else come across this. Passenger side no whistle at all.

[Speedbird1]

I get exactly the same thing at exactly the same speed, from the exact same location i.e. drivers door / windscreen area - been driving me a bit nuts. Only times it changes is if there is a strong crosswind but I can hear it 90% of the time. Be very interested to hear what the dealership thinks.

[titomi]

Some complaints about this are mentions throughout the forum, check this thread wind noise in M40i. Few members stated, that having acoustic glass helps. I have those and can't complain, but also can't compare to non-acoustic X3.

[Pete17]

I don't have the acoustic side windows but it is not wind noise you can hear that from around the mirrors. This is a proper whistling sound. When doing less than 50 mph it is not present.
I have checked the door alinement and to me looks ok.

[MechX3M40i]

I have similar noise, which I attribute to wind noise. I suspect it came from air moving through the space between the A pillar and the mirror. It could also be noise created around the unsealed mirror (similar to you blow air across the mouth of an empty beer bottle and a high pitch sound is created).

[Speedbird1]

I have the acoustic side glass and the noise sounds just like that air across a bottle-top analogy. Shame really, as the rest of the car is perfect.

[TXSchnee]

I had that in my F25, it was due to an incorrectly installed trim piece. Once that was corrected, noise was gone. I do not have this issue with my G01, so I doubt that it is just wind noise coming from around the mirrors at speed.