Yes that's exactly right. When you get close enough the idrive will notify you it's time to change the plugs (air filter is not in the service folder in the idrive). Just reset it and you're good for another 45k.
Here's a link to resetting if you don't know how
https://docs.google.com/document/d/1...tqCHL02u-0i8cc
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2016 340i XDrive, EBII/black, 6 MT, M Sport, Track Handling, Cold Weather, Tech, Lighting, Driver Assistance Plus.
2012 Z4 35i, ED 2/24/2012, Melbourne Red Metallic, Black Leather, Carbon Trim, 6MT, M Sport, CW, PP, PS, NAV, CA.