Is the fan in your Audi's climate control acting up? This new front HVAC blower motor (with fan cage included) is a direct replacement for 2009-2012 Audi A4, A5, Q5, S4, and S5 models. Brand is BOXI, part number BX00700058-1YY578, and it's compatible with OEM numbers like 8K1820021A, 8K1820021B, and 8K1820021C. It's brand new, unused, and comes in retail packaging – ready to install. This part handles the heating and AC airflow, so if your fan is noisy, slow, or dead, this swap can fix it. Includes a 1-year manufacturer warranty, and the seller offers free return shipping on damaged items (plus free shipping in the 48 states). A solid aftermarket option that saves you dealership costs. Just make sure your model year matches, and you'll be back to comfy cabin temps in no time. No more sweating or freezing – get that airflow working right!