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Qsilver7 · 05-13-2022, 04:23 PM

The HVAC stratification flaps are related to the stratified air dials on the center vent. They allow you to temper the air warmer/cooler:

The motor for each stratification flap (left/right) are M9/M69...the function of both are the same so I only posted the info for the left stratification motor. There are also other motor/flaps...like M21 is for the footwell & M20 is outside left motor flap...both of those can be seen in the illustration below...plus there are more flaps. Diagnostic equipment should be able to pull which flaps are having an issue:

05-13-2022, 04:23 PM	#2
Qsilver7 Major General 4539 Rep 7,588 Posts Drives: F06 650ix GC / F15 X5 50i Join Date: Oct 2016 Location: Indiana, USA iTrader: (0)	The HVAC stratification flaps are related to the stratified air dials on the center vent. They allow you to temper the air warmer/cooler: The motor for each stratification flap (left/right) are M9/M69...the function of both are the same so I only posted the info for the left stratification motor. There are also other motor/flaps...like M21 is for the footwell & M20 is outside left motor flap...both of those can be seen in the illustration below...plus there are more flaps. Diagnostic equipment should be able to pull which flaps are having an issue: Attached Images __________________ 2015 F06 650ix Gran Coupe`(Moonstone/Cohiba Brown)\| 2014 F15 X5 50i MSport (Space Gray/Mocha) Become a BMW CCA member! Click HERE to join and feel free to use my BMW CCA member #191509 as a referral. Last edited by Qsilver7; 05-13-2022 at 04:56 PM..
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