Premium Guard Air Filter PA5373 | Fits Hyundai Sonata 2005-1999, Kia Magentis 2006-2001, Optima 2006-2001 Superior Engine Protection and Enhanced Engine Performance with up to 99% cleaner air before it flows into the car's engine. High capacity air filter media for removal of harmful airborne particles such as dust, pollen, and other debris while providing high airflow, non-restricting airflow, to ensure optimal engine performance which improves vehicle miles per gallon. Compatible with Hyundai Sonata; Kia Magentis, Optima. Precisely designed, engineered, and tested to meet and exceed all Hyundai, Kia OE air filter requirements. Premium Guard Air Filter are perfect fit inside the house as per the OE design Replaces HYUNDAI 28113-37010 air filters. Always check fitment using the Vehicle Filter. 1999-2005 Hyundai Sonata 2.4L 1999-2001 Hyundai Sonata 2.5L 2002-2005 Hyundai Sonata 2.7L 2001-2006 Kia Magentis 2.4L 2001 Kia Magentis 2.5L 2002-2006 Kia Magentis 2.7L 2001-2006 Kia Optima 2.4L 2001 Kia Optima 2.5L 2002-2006 Kia Optima 2.7L <u>Engine Light Comes On</u>: Many cars are equipped with an airflow sensor that sets off the check engine light. <u>Visual Inspection</u>: Premium Guard automotive air filters are white so you can see if they&#039;re dirty. Check the outside and inner layers of the filter paper for dust and debris. <u>Reduced Fuel Economy</u>: When engines get less oxygen, they consume more fuel. If you notice fuel economy going down, you may need to replace the air filter. <u>Engine Misfiring</u>: Restricted air supply results in unburnt fuel exiting the engine as soot residue. Soot accumulates on the spark plugs, which can cause the engine to misfire. <u>Reduced Horsepower</u>: Replacing the air filter can improve acceleration or horsepower. If your car doesnt respond well or jerks when you step on the accelerator, the engine may not be receiving the air it needs to perform. <u>Black Sooty Smoke or Flames</u>: Poor air supply can result in fuel not burning completely during the combustion cycle. Unburnt fuel exits the car through the exhaust pipe, possibly resulting in smoke or flames. Driving conditions Dusty roads Humid climates Congested roads and heavy-traffic areas