What is the most common engine problem in Ford S-Max cars?

I am the owner of a Ford S-Max and I have been experiencing engine troubles lately. What is the most common engine problem in this model and how can I prevent it?

The most common engine problem in Ford S-Max cars is the failure of the fuel injectors. This can be prevented by regularly cleaning and maintaining the fuel injectors.

Another common issue is the failure of the ignition coils. To prevent this, make sure to replace them every 80,000 miles or sooner if you notice any symptoms of failure.

A clogged fuel filter can also cause engine problems in a Ford S-Max. It is recommended to replace the fuel filter every 20,000 miles to prevent this issue.