October 28, 2013, 12:50 pm
I recently took our '13 N20 F30 in for service with the indicator saying 2100 miles to service as we were about to take a road trip of ~4000 miles (and didn't want to exceed the service mileage by a couple thousand miles). When new, the CBS indicator said 15K miles. At the time I took the car in it had ~13K miles and the indicator was displaying 2100 miles to service, consistent with the initial 15K indication.
When I arrived, the SA 'read' my fob and indicated I was 51 miles shy of the early limit BMW imposes to provide the service, that limit being 2000 miles. I found this interesting from a couple of standpoints; 1) it's the first time I've heard of a 2000 mile early limit and, 2) he was able to 'read' the mileage to the mile where the in car display had said 2100 miles to service for the last 300 to 500 miles, apparently being a low resolution indication (don't know why the SA I'd made the appointment with the previous week did not mention this mileage limit as I'd explained it was early).
So, I drove home and came back that afternoon, having added more than the requisite miles needed. When returned, the CBS indicator displayed 12K miles to service, so it appears the base mileage was revised to 12K miles when they reset the CBS.
On a related note, during this visit the dealer indicated that in addition to the mileage, they want the car brought in for service annually. This was surprising as the CBS indicator has always displayed a mileage or two years from the in service date. And, when reset during the service, it now displays 12K miles or 2 years from the service date. I've checked the manual and, unless I've missed it, not only can I not find anywhere an owner is told of this annual service (regardless of mileage) and, indeed, the CBS display indicates semi-annually.