Is the wet belt in a 2022 Ford Focus a problem?

I bought a 2022 Ford Focus petrol ST line MHEV early this year and since have seen reports etc that the wet oil pump belt being rubber is causing problems. However I saw that the mild-hybrid model has a chain and not a rubber belt. Have you any information on this problem?

Many thanks

Frank Dodd (Dublin)

Jul 2025 Filed under: reliability

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Expert answer

Hi Frank,

It's the timing belt itself that you've heard about most likely as, on some versions of the 1.0-litre Ford EcoBoost engine, it is what's called a “wet belt”. That means the timing belt actually runs in oil, where most timing belts do not.

Ford isn't alone in having problems with them. The rubber in the belts can degrade due to many issues including use of the wrong engine oil and impurities in the oil as it gets older.

The good news for you is that, while earlier examples of the 1.0-litre EcoBoost engine did use this setup (though not all), and Ford dropped it from 2022 on, the MHEV engines always used timing chains instead and they should therefore be more robust.

However, even those later engines use a rubber belt to drive the oil pump and that still runs in oil so potentially has all the same issues. It is too new for those problems to have come to light and Ford believes it is designed for the life of the engine because it is under far less stress than the timing belt was.

All we can advise is that you carry out oil changes a little sooner than recommended and that you always use the correct specification of oil.

Shane O' Donoghue - Complete Car Advisor