There's no monitoring, you are correct. It's based on an algorithm. It does change. My car has needed rear brakes in "2,500 miles" for about 15k now. LOL.
Originally Posted by markl53
Yes, it's in the list of service items, separate for front and rear brakes. However, I think that is just the recommended interval, I don't think there is any active monitoring of the actual pads, certainly not the rotors. The car (like all others) is equipped with pad "wear indicators" that will emit loud screeching sounds (while NOT braking) when the pads are reaching end of life. Most likely, your dealer will have checked the pad wear long before that occurs during an oil change or other matinenance visit. Oh, I've owned 3 BMW's, and have never changed a brake pad (or tire, for that matter). The "oldest" of my previous BMW's had about 46K miles and the pads still had plenty of wear left.
Sophisto Grau / Oyster - Black Nappa, Anthracite Wood
ZAV, ZCV, ZCW, ZDA, ZDH, ZPP, ZP2, ZSP
Mods - M5 Grilles, BMWPedals Black Anodized
Heaven is where the police are British, the cooks are French, the cars are German, the lovers are Italian and it is all organised by the Swiss.
Hell is where the police are German, the cooks are English, the cars are French, the lovers are Swiss, and it is all organised by the Italians