A vs M in Climate Control

[Arm]

Are these covered under the standard bmw maintenance plan? For the first two years or something like that?

[jadnashuanh]

They used to be...BMW has changed the coverage, depending on the MY, so you'd have to ask, or it would be covered in the warranty documents but those can be harder to decipher sometimes.

[gt1]

They replaced mine under the included mainenance early this week.

[alohart]

They replaced mine under the included mainenance early this week.

This must be a dealer choice in the U.S. During the first scheduled maintenance of our 2014 BEV in November, 2016, our dealer replaced the filters. During the final scheduled maintenance in November, 2018, our dealer informed me that filter replacement was no longer being performed routinely.

[jadnashuanh]

Originally from what I remember, cabin filter change recommendations were time based, but now are distance. That may be reasonable, but can be problematic in some situations like say you drive lots of dirt roads, or often get some really polluted air whether from pollen, smoke, diesel fumes, or dust.

They're kind of a pain to take out to just look at their condition. Laborwise, just as cheap to put new ones in, but maybe not if you're doing it yourself.

[eNate]

With all the electronics in our cars, a simple post-filter differential pressure sensor would be an easy add to indicate when airflow is sufficiently impeded. Yeah, another doodad to malfunction!

[MagicCarpet]

I wonder if mine is not closing the outside air vents fully in M.
Most of my trips are short and I always have M selected but still get diesel fumes and smoke entering the system from time to time. I cycle the controls Auto to Manual it doesnt fix.
This seems to be happening only in the last 6 months so might be a jammed servo. If I ever replace the filter I'll try to look at the mechanism then, its on my to-do list

[Arm]

I did a little digging and apparently the filters are part of the BMW Care Package for cars 2017 and newer. That coverage of course is 3 years/36000 miles.