I bought a 2007 x5 at 105k in California and.drove it to.texas it.now has about 3000 more miles on it but the miles til brake service needed hasn't changed for either the front or rear at.all per.the car info. What.gives? The x5 says brakes needed.in 3900 for rear and.5000? For front. I see.records.say front was.done about 38000 ago and.rears.about 50000.ago