Your BMW uses two air filters -- a cabin air filter and an engine air filter. They're both essential to how well your motor and AC and heating systems work. What do air filters do? Generally, they trap airborne contaminants. They do it using specially pleated fibers made of synthetic paper, foam, or cotton. Your cabin filter, for its part, helps prevent allergen buildup in your HVAC. Your engine filter helps prevent dirt and muck getting into your air intake and piling up on other components, like your fuel injectors and spark plugs. If that car or SUV you love didn't have either kind of filter, that particulate would start to wear out both auto parts and systems double quick. Unfortunately, though, even the best air filters degrade with age or clog. When they fill up with muck, more trouble follows -- everything from engine stress and misfires to higher emissions and lower gas mileage. Your heater and air conditioner can even malfunction. The best way to keep this from happening? Replace your air filters regularly.
What Are the Signs It's Time to Change a Car Air Filter?
There's a few, and they're easy to identify. Look for a lit Check Engine light and dirty or decayed surface fibers, listen for weird engine noise, and smell for unclean cabin odors. Your can even look for excessive exhaust. If you see such symptoms, it's probably replacement time. Otherwise, check your owner's manual's filter maintenance schedule for the answer. It's recommended you replace an air filter in a car about every 12,000 to 15,000 miles. When it's time to buy new ones, however, be sure to order genuine OEM. What comes from the BMW factory will fit your model best. You can buy what you need right here online at our auto parts store.
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