What is the most common problem with Ford Focus engines?

I have a 2005 Ford Focus with 150,000 miles on it. Lately, I've noticed a strange noise coming from the engine and I'm worried it might be a serious problem. What are some common engine problems with Ford Focus and what can I do to prevent them?

It's possible that the noise is coming from a faulty fuel pump or a damaged exhaust pipe. I would suggest taking your car to a trusted mechanic for a thorough inspection.

Another common issue with Ford Focus engines is a faulty ignition coil. This can cause rough idling and decrease in engine performance. It's recommended to get the ignition coil replaced if this is the case.