The stock BMW 735i air filter that came with your car will not last forever. Like the other filters in your car, your 735i air filter is made to be used up. It makes sense, because the function of your BMW 735i air filter is to collect and entrap contaminants like dust, dirt, and engine grime before they enter your combustion and exhaust system.

Over time all those contaminants build up in your 735i air filter, causing blockage. Since your car needs air to "breathe", you should replace your BMW 735i air filter at least once per year, or more often if it becomes dirty faster.

Unfortunately, you won't always be able to tell when your 735i air filter is too clogged to perform. Sometimes a visual check of your BMW 735i air filter will make it appear that it is still okay, when in fact it may be too plugged to allow air through. To make sure your 735i air filter is working, remove it and blow through it. If the air passes through your BMW 735i air filter with minimal resistance, you can put it back and keep driving. However, if little or no air makes it through your 735i air filter, it is time to order a replacement BMW 735i air filter from our extensive online catalogue. If you don't want to keep replacing your 735i air filter all the time, you may want to consider a high performance BMW 735i air filter that is washable and reusable, and gives you more horsepower by increasing the airflow to your engine.Whether you need a stock 735i air filter or a performance BMW 735i air filter, you will find what you're looking for in our extensive online catalogue.