You should clean the filter element and the place where it is installed - the foam dust collector in the air filter box - at least once a year and change it at least every two years. You can buy new filter inserts for your Focus from a seller working under a contract or from a store of related products. However, this does not always have to be an original spare part, but still be sure to pay attention to the quality of the product. In addition, low-quality foreign products are sold at the stalls in stores of related products. Maybe at the moment you will save money, but in the long run the engine will pay you back for your greed - it will inhale more dirt particles and wear out prematurely.
Stages of work
Remove the 4 air filter cover mounting bolts.
Remove the cover and take out the filter element.
1 - Air filter outlet hose; 2 - Mass Air Flow Meter (MAF); 3 - air filter housing lining; 4 - Air filter insert; 5 - air filter housing; 6 - Air filter inlet hose
Before installing a new filter element, wipe the filter housing and cover with a lint-free cloth or blow it with compressed air. Make sure that the gaskets of the new filter insert fit evenly against the clamping surfaces of the filter housing.
