To remove the air filter housing you have to first disconnect the air intake duct from the housing. Then, turn the hose clamp counterclockwise and remove the connector at the mass air flow sensor. To replace it you pull out 4-6 mm-head screws that hold the filter housing on top and slide the housing upward out of the compartment. Following that, remove the screws from the filter housing cover and, therefore, detach the cover. Removing the Air Filter and putting in a new one should be done. When it comes to installing the impellers, it must be done in a manner that is a reverse of the removal process.