1. Why change the air filter? ① Air filters are very important parts for gasoline and diesel engines. ② The engine of a commercial vehicle can suck up to 1500m³ of air per hour, with impurities as high as 50mg/m³. ③ The air filter is installed in front of the carburetor or the intake pipe to filter out dust and grit in the air, ensuring sufficient and clean air to enter the cylinder.2. Invalid air filter: obsessive build-up of dirt, distortion, deficient airflow. Engine problems caused: carbon deposition, cylinder scoring, unusual increased fuel consumption etc. If the following situations happen, you may need to check your engine air filter and replace it. ① Strange engine noise ② Gas mileage decrease ③ Engine light illuminates normally or not ④ Slow acceleration and lack of horsepower ⑤ Smell of fuel when starting the car ⑥ Black smoke coming out of the exhaust3. Compatible model and year list: Tacoma (2005-2015), 4Runner (2003-2005), FJ Cruiser (2007-2009), Tundra (2005)Replacement part numbers: 17801-0P010, 17801-31090CA9683 GP683Warm Tips: Detailed installation instructions are included in the manual, and installation can be easily done in just a few minutes.