Just as your BMW 740I needs clean and filter fuel for its combustion process, so does human needs clean air to breathe. This is the reason why our nose is very important for it is responsible of filtering unwanted and harmful particles so it can not enter our system. Your BMW Air Filter is the ‘nose’ of your vehicle. It filters small particles such as dirt, molds, pollens and bacteria so the air that will circulate in the vehicle’s interior is purified and clean. Even if our nose can filter air before it enters our lungs, still, it can not filter ALL of them. If bacteria or other dust particles come in groups or at massive degree, how do you expect to your nose to take all that? Besides, some particles can’t be screened by the nose. Bacteria for example can freely enter our system. If your interior is provided with functional air filter, its passengers’ exposure to allergy and bacteria will be lessened. A functional air filter also appears as K&N Air Filter. K&N air filter is guaranteed to give full screening and filtering power that upon the very installation, you will notice the sudden change in the air quality! This product will also serve you and your BMW 740I for a very long time because of its high durability rate! If you want quality and durability to come in one package, purchase BMW K&N Air Filter!