How often to change microfilter?

How often should the microfilter be changed? Is it with every oil change because I just brought my vehicle in and it was never done.

I believe that it's one of the CBS items that will call it out on the dash display when due.

If you are referring to the in-cabin filter then it is every other oil change as per my warranty booklet and I have seen the same thing said in some other documents from BMW. If you are referring to the air filter on the engine then I am not sure for that one.

THanks. Don't think it shows on CBS after 08

I was wondering about the cabin microfilter. The engine filter is every 3rd oil change i belive.

My car has never told me it needs any filters, but it also hates me. The key reader at the dealer though has mentioned them all when the time came up for them.

isnt it every 30k that they make the change, frankly I dont even know where the hell my book is, LOL