The factory air filters in your car or truck are responsible for keeping contaminants out of your engine and HVAC system. Engine air filters minimize pollutant deposits in your throttle body, carburetor, and many other auto parts. Cabin air filters catch dust and pollen before much of it can accumulate in the ducts and vents of your heater and air conditioning system. If both filters clog, you can start to see problems. An obstructed engine filter can make your air-to-fuel ratio too rich. Engine inefficiency, misfires, and lower fuel economy can result. That's not to mention increased emissions. A blocked cabin filter, however, keeps air from flowing freely through your heating and AC systems. Interior temperature problems, bad air quality, and needless stress on your motor result. Luckily, when to change both air filters is easy to figure out. You can look for a lit Check Engine light, but brittle filter surfaces, fiber discoloration, and impurity build-up are better signs. Engine filter problems often show up as abnormal engine noise or exhaust production. Bad airflow and smells, on the other hand, can be symptoms of cabin filter problems. If you're not clear on when to replace air filters in your car or truck, review your owners manual. It has schedules for filter maintenance that will help. So, which air filters are best for your vehicle? Genuine OEM filters are the most reliable. They come straight from the factory compatible with both your make and model. Our local auto parts counter has plenty in stock. Check out our selection online, put in your order, and save time and money we'll ship to right to your door!