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If you don't want to use a large drill to bore it out, you can also take a soft grinding wheel / bench grinder and take off some of the plastic material from the breather hose connector. Just trial and error to take off enough to get a snug push-in fit. No need for any sort of clasp.

There's another semi-active thread about this same issue. What stinks is that this has been a fairly known problem with the BMW units for several years. If it isn't solved via calibration (e.g., Bimmercode reset), then it's a mechanical issue - literally breaks in the cheap plastic parts that...

Ugh, $3k is about what I expected - so much labor to dismantle the dash just to replace a few plastic pieces. This should not only be a warranty issue, but a recall (the faulty temperatures also blow through the defroster, which won't work effectively if it's freezing cold air, obviously).

And if they share it and you're comfortable, let us know the $$$ damage you would have paid, but for your warranty!

Newish owner of a 2020 with the same issue. I did some internet research and as others have mentioned, it is a more common issue with late 2010s BMW models that share the heater unit and actuator system. Not clear if a full replacement includes a long-term fix (if it’s just the same part that...