Hello. I did my cabin filter change recently and it was a pain in the butt. I don't see the design purpose behind it besides swaying owners to dealership like some had mentioned. This would've been a one minute job on my Lexus RX. Anyhow, I thought I share my findings about the cabin filter itself. I found that the HENGST brand to be more sturdy as it has plastic side walls to support, especially when pushing the filter into the housing box in the tiny space that you have. The filter that a dealership put in my car under the warranty was the MANN brand which felt flimsy with no side support. My filter looks filthy after 17k miles and I drive my F10 in same area and the cabin filter didn't look nearly as filthy after 30k miles which makes me wonder if the dealer actually replaced it.
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