1.Secure the vehicle. Park the car

1.Secure the vehicle. Park the car on level ground and apply the parking brake. Shift into first gear (manual transmission) or Park (automatic transmission), and turn off the ignition
2.Open the bonnet (hood). Release the bonnet with the lever inside the car. Move the exterior bonnet catch for final release. Lift the bonnet and secure it with the prop rod.
3.Locate the air filter unit. The air filter unit is usually situated on top of the engine.
4.Remove the air filter cover. Loosen the hose clamp that seals the air conduct. Undo all the screws holding the air filter cover. Some models have wing nuts; other air filters are just clamped on with a quick release system. Keep screws and other parts together and in a safe location so you can find them later. Pull the cover out of the air conduit and lift it up so it comes off the lower part of the housing. Consult a mechanic if you don't know how to lift the cover.
5.Take out the air filter. Now you can see a round or rectangular filter made of cotton, paper or gauze. Filters have a rubber rim that seals off the unit's interior. Simply lift the filter out of the housing.
6.Clean the air filter housing.Connect the air hose to the compressor and use the compressed air to blow out the dust, or use a vacuum cleaner to suck up any dirt.
7.Replace the filter. Replace the old filter with a new one. Simply insert it into the housing with the rubber rim facing up. Make sure the edges are sealed by the rubber rim.
8.Replace the cover. Carefully insert the cover back into the air conduit and then press the entire piece down onto the lower half of the air filter unit.