When do Ford EcoBoost wet belts need replacing?

We have just had our Ford B-MAX - a 2018 car with only 13,500 miles - serviced and the advice is to have the drive belt replaced as although Ford service books says 10 years, the garage says the latest advice is 5 years. It will cost up to £2000 as it's a complex job. That seems a lot of money to spend on a 7 year old car. Are you please able to confirm this advice?

As my wife likes the car she would like to keep it but I think that sort of cost every five years means we should change it now. Ford does not provide smaller cars without the EcoBoost engine so what else might you suggest we consider please? Value of car plus £10k say?

Asked on 26 March 2025 by Rob Neill

Answered by David Ross
Older EcoBoost engines have had issues with the wet belt design that can cause the oil system to become clogged and cause the belt to fail, with the potential for significant engine damage. While Ford's official advice remains 10 years/150,000 miles, owner experiences have shown that an earlier change is recommended to ensure the engine remains in good health. It could be argued that as you cover a very low mileage you could potentially hold off for a while longer, but a low mileage suggests frequent short journeys which can put additional strain on the engine, so we would not advise doing so.

While the cost of replacement is higher than some vehicles, we would recommend looking at independent Ford specialists who will have the experience and required expertise, and you may be able to get a quote for a lower price. Although this represents a significant cost, your car is still very low mileage and has the potential for many more years of reliable service. If you do decide to go ahead with the maintenance, we would suggest more frequent oil changes to ensure the new belt remains in top condition.

If you decide to change the vehicle, 2019-on Fords using the EcoBoost engine have a timing chain rather than a timing belt. The Fiesta was also available with a 1.25-litre non-EcoBoost engine up until 2016/2017, so although they may be thin on the ground there are examples out there.
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