May 2020: Ford Mondeo MK3 (2001 2007) Changing the Air Filter. Changing the air filter periodically can increase fuel efficiency and improve acceleration. If you do a lot of mileage it should be done every 12,000 to 15,000 miles. This is very easy to do, takes a few minutes and in my case the filter was £5, no excuse really. Ford lots of technical videos. Ford - How to change the Ignition Coil Ford Mondeo MK3 (2001 2007) Changing the Air Filter https://sites.google.com/view/tecchie/home https://sites.google.com/view/fxv300tech/home