2008 E92 - 50K miles
Mods include air filter, that is it.
Only problem is 'engine malfuction' warning came one (though car didn't feel any different), dealer couldn't figure out what it was, replaced engine wiring harness and the problem disappeared (under warranty).
Out of BMW warranty now, but since I bought my car through CarMax, I have their 6 yr, 125K mile warranty, so not too worried for a while about big ticket items. Wear and tear items are on me and will replace with modifications!