What are the common faults in Ford Focus engines?

I recently purchased a second-hand Ford Focus and I am worried about potential engine problems. What are some of the most common faults in Ford Focus engines and how can I monitor and prevent them?

One of the most common issues with Ford Focus engines is a faulty ignition coil. This can cause the engine to misfire and lead to potential engine damage. It is important to regularly check and replace your ignition coils if necessary.

Another common issue is a leaking head gasket, which can lead to overheating and potential engine failure. It is important to regularly check your coolant levels and keep an eye out for any leaks.