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Guide to Replacing the Engine Air Filter

Model: Subaru Legacy BP, MK 4, BL - Years 2003-2009
Part: Air filter

The engine air filter is a component of the vehicle's fuel system and serves to filter and clean the air that is drawn in from outside and delivered to the combustion chamber. The engine air filter consists of a solid part and a filtering element. It should be changed approximately every 10,000 miles or once a year. The filter is housed in a container called an air box, which is a variable-shaped and sized air chamber located near the engine. You can refer to the owner's manual to locate its correct position.

Updated on 10 February 2026 by ScegliAuto

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How to Replace the Air Filter on a Citroen C4

How do you replace the engine air filter on a Citroen C4? Watch this video to see how to proceed. Open the car door, pull up the engine compartment release lever located at the bottom left of the dashboard, and lift the front bonnet, securing it. Using a screwdriver, unscrew the air kit, disconnect the engine air intake hose and the metal clamp pin. Remove the air filter box from the vehicle body, then extract the worn air filter and insert a new one, ensuring it fits snugly against the walls of the box. Finally, reattach the air box panel and tighten the screws. Close the front bonnet last.

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by ScegliAuto

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