Why is my Vauxhall Vivaro's engine not starting?

I have a Vauxhall Vivaro and it won't start. The battery seems fine and all the lights turn on, but when I try to turn the engine on, nothing happens. What could be causing this issue?

It could be a problem with your starter motor. Try tapping on it lightly with a hammer, this might help loosen any stuck components.

You might have a dirty or faulty spark plug. Try cleaning or replacing it to see if that helps.

Check your fuel pump. If it's not working properly, your engine won't receive enough fuel to start.