by local expert Shajib Haque
Open the bonnet and find the air filter box (check your car’s manual).
Remove the filter’s housing. Depending on what it’s held with you’ll need to use a screwdriver (cross-head screws), socket bar or spanner (bolts) or torx driver (torx bolts). Undo all the screws and open the housing. You may need to gently ‘wiggle’ the air box off, but don’t force it.
Find the paper air filter element and remove it. A dirty one will be dark grey and black, a clean one will be pastel orange or yellow.
Match up the new air filter to make sure it’s the same as the old one. Put the new one in and re-assemble, re-attach the casing and do up the screws.
If you’re unsure which air filter is right for your car, any parts supplier will be able to tell you.