Warning: Mileage on service records

[outnumbered]

I try to keep all the documents on my car in good order in order to help with selling, when the time comes.

I recently had some repair work done at a main dealer, and yesterday noticed that the recorded mileage on the invoice was completely wrong - about 2000 less than it should have been.

Turns out that I'd given them the spare key, which hadn't been used in the car for months, and they read the key electronically to give them the current mileage. So it was showing well below the actual mileage of the car on the day.

I'm trying to get this sorted out, as I don't want an anomaly showing up on the car's service record back at BMW UK... so watch out for this, as it could be a common problem.