Brake Service?
 

The vehicle started displaying remaining kilometers(miles) a few months ago, currently it's displaying about 2,500km(apprx. 1,500miles) is left for both front and rear, but it does not show service due sign yet.

As far as I know, BMW NA does not replace them with new brakes/rotors under warranty unless it displays service due on dashboard, but I'll leave for a long road trip and it'll definitely start displaying service due warning in the next 500 miles or so.

What should I do? I cannot come back to dealership for service after driving 500 miles or so. I can trigger the warning by driving 500 miles in the city for nothing, but that's stupid.

Thanks.

You should call your US dealer and ask him when he would like to see the vehicle for brake replacement under the maintenance plan (not the warranty).