I can only assume for the F20, but with the E87 you went into the computer -> service -> you could scroll from service to service, it showed/told you, whats next, whats up when..
If your next service is rear brakes, you might wanna give your dealer a visit, as there is a (more or less) known problem with the sensors there. People are reporting rear-brake-service due in ridiculously low miles, which always turned out to be a faulty number, because the pads were still fine.
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