Does not reduce odors from the air conditioner at all. Exhaust, cigarettes, burning rubber, etc., all smells penetrate my cabin. Not sure if it actually picks up contaminants like dust etc, time will tell. This will be the time I buy my next brand new filter. This filter was significantly thinner and lighter than the OEM filter that came out of my Q7. By the way, the wrong filter was included with my first order. They sent me a Honda filter, it had a sticker and barcode for Audi, but I found it had 2 stickers, one for Honda, the other for Audi. Revain promptly sent a replacement.
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