How do I change my Ford Fiesta's spark plugs?

I've been having trouble starting my Ford Fiesta, and I suspect it's due to old spark plugs. How often do I need to change them and how can I do it myself?

It's recommended to change your spark plugs every 30,000 miles. You can easily do it yourself by following these steps:

I had the same issue with my Ford Fiesta and changing the spark plugs did the trick. Here are some tips to help you change them with ease:

I'm a mechanic and I definitely recommend changing the spark plugs every 30,000 miles. Here's a step-by-step guide to help you do it correctly: