Routine maintenance corresponds to Inspektion I BMW. It should be carried out when the message lights up «Inspektion» along with a yellow LED.
If you do not adhere to the indication of service intervals, then routine maintenance is carried out every 20,000 km, or at least once every 2 years. Maintenance work to be performed less frequently (corresponds to Inspection, II BMW) listed at the end of the scheduled maintenance plan.