Near the top of your engine is a paper fiber filter in a cardboard frame known as your BMW 740iL air filter. Like most filters, the job of your 740iL air filter is to remove contaminants from a particular supply; in this case, air. Your engine needs air to "breathe," and so your BMW 740iL air filter provides an important service.

As air enters your engine bay, the 740iL air filter removes contaminants and particles such as dust, grit, and grime, allowing your fuel to burn clean. If your BMW 740iL air filter is clogged, oxygen is not reaching your cylinders.

A dirty 740iL air filter can result in lowered fuel efficiency, a hot running engine, and reduced engine performance. Those are some serious consequences resulting from a single filter! It is recommended that you change your BMW 740iL air filter at least once per year, and more often if it becomes clogged faster. Your 740iL air filter may get especially dirty if you put a lot of miles on your car, or if you live in a dusty climate. The BMW 740iL air filter is one of the easiest filters on your car to change. Unlike your fuel filter and your oil filter, which are contained by metal cylinders and located in hard-to-reach areas, your 740iL air filter has easy access under your hood. The BMW 740iL air filter simply lifts out, and you can just place the new 740iL air filter right in its place. If you do not want to change your BMW 740iL air filter that often, or if you are looking for an inexpensive way to boost your car's performance, you may want to consider a high performance 740iL air filter that is washable and reusable, and allows better airflow to your engine.