Ford 1.0 EcoBoost — Wet Belt vs Timing Chain: When the Change Happened, Which Models, and How to Tell
If you own or are shopping for a Ford with the 1.0 EcoBoost, you’ve likely heard about the wet timing belt. In Europe from 2018 onward Ford rolled out a revised 1.0 with cylinder deactivation, a reversed-flow head (turbo at the firewall), and crucially a timing chain for the cams.
The Fast Answer
- ✓ 2018+ “revised” 1.0 EcoBoost = timing chain for cam drive (turbo at rear / firewall).
- ✓ All 1.0 EcoBoost mHEV (48V) models use the revised chain-cam engine.
- ✗ Pre-2018 1.0 EcoBoost = wet timing belt for cam drive (turbo at front of engine bay).
- ! Regardless of cam drive, the oil pump is still driven by a small wet belt on the revised engines.
Always confirm by VIN/spec — transition timing varies by plant/trim and registration plate can lag model-year.
How to Spot the Difference
Pre-2018 Wet-Belt Engine
- Turbo at the front of the engine bay
- Conventional head layout
- Main camshaft drive is a wetted rubber belt
- Prone to belt shedding into oil system
2018+ Revised Chain Engine
- Turbo mounted at the rear (firewall side)
- Reversed flow cylinder head
- Main camshaft drive is a timing chain
- Includes cylinder deactivation tech
Model & Year Changeover Table (UK Market)
| Model | Years With Wet Belt | Years With Timing Chain |
|---|---|---|
| Fiesta 1.0 EcoBoost | 2012–2017 | 2018+ (all mHEV are chain) |
| Focus 1.0 EcoBoost | 2012–2017 | 2018+ chain |
| Puma 1.0 EcoBoost | – | All production chain (2019+) |
| EcoSport 1.0 EcoBoost | 2014–2017 | 2018+ chain |
| C-Max / B-Max 1.0 EcoBoost | 2012–2018 (end of model run) | Never got revised engine |
| Mondeo / Galaxy / S-Max 1.0 EcoBoost | 2015–2018 | Never updated — discontinued |
What About the Oil Pump Belt?
Service & Reliability Notes
Wet Belt Engines
- Ford originally claimed “life of car” belt
- In reality: replace at 8 years / 100,000 miles (UK service advice)
- Failure often ruins sump, oil pickup, and turbo
Chain Engines
- Chain is designed to last engine life
- Still dependent on correct oil spec (WSS-M2C948-B)
- Poor servicing can still cause wear/stretch
Common FAQs
Does every mHEV EcoBoost use the chain engine?
Yes. All 48V mild hybrids require the revised engine layout (chain-driven) because the belt-alternator starter motor packaging would clash with the old turbo-at-front design.
Can I swap a chain engine into a wet-belt car?
It’s not a straight swap. Mounts, ECU coding, ancillaries, and wiring differ. It’s more practical to replace like-for-like.
Do oil pump belts need changing?
Not listed as a service item by Ford. Failures are rare compared to the main wet cam belt. Still, keeping oil changes frequent minimises risk.
Need Help With a Ford 1.0 EcoBoost?
At TGPP Autocare Stevenage we specialise in EcoBoost engines — from wet belt replacement to full engine swaps and turbo issues. We use genuine parts, Ford-approved oil, and can collect and return your vehicle locally.
Book Your EcoBoost ServiceWant to know how to tell the difference between the 1.0 ecoboost engines, see below
This is the older version of the 1.0 ecoboost which runs the Wetbelt system
This is the newer chain version of the 1.0 ecoboost
Add comment
Comments
Thanks for the information, just looked at my mk8 fiesta and the turbo is at the front so it’s the old style ecoboost with a Wetbelt
Thanks Jake, we are glad we could help.
Do you think they will do a chain kit for the older Wetbelt system?
I don’t think they’ll ever make a chain kit for the older 1.0 EcoBoost wetbelt engines. The engines were designed around the belt system, so changing it to a chain would mean completely re-engineering parts of the engine. The cost and complexity just wouldn’t make sense compared to simply replacing the wetbelt at the correct interval.
Wetbelts are a stupid idea tbh!
So the newer 1.0 ecoboost still has a wet belt but it’s just the oil pump belt? I didn’t know that, do they fail too?
Yeah they still have oil pump belt, but the cam drive is a chain on the newer ecoboost. They can fail, the automatic versions were really bad and would strip all the teeth on the oil pump belt, but I think fords recalled them. The manual ones seem to be okay. But my advice is to regularly get your oil change
It’s good to know that the Mehv all have the newer engines
What is the service schedule for the oil pump belt?
Ford don’t list it as a service item, but oil neglect can shorten its life.
When did Ford realise there was a problem with this wet belt before they abandoned it for a chain?
Did Ford in the US run a recall on these engines?
Ford had warranty claims and failures showing up from as early as 2016, but the first formal internal review was in 2022, and by late 2023 they issued a recall there for the oil pump drive belt and tensioner. In my opinion, Ford probably knew the design was problematic a few years before the official changeover — the decision to move back to a timing chain around 2019–2020 suggests they had already accepted that the wet belt system wasn’t living up to expectations.
I don’t think they recalled the 1.0 ecoboost in any Country but they did recall some focus’s and Ecosports over the the oil pump belt failure on automatics
My daughter has a 2018 Grand C-Max with a 1.0 ecoboost. Turbo is at the back so I assume this is the timing chain version. Do any of the welbelt engines have the turbo at the back?
Yeah so if the turbo is at the back it’s the newer chain engine. All the 1.0 ecoboost wet belt engines have the turbo at the front
I have a red edition 1l ecoboost that’s just done 75,000, just had a look under the bonnet and the turbo / heat shield is at the front! Looking online it looks like I need to get the Wetbelt done soon
I have a 192 ecosport 1.0 petrol 48000 km on it does that have a wet belt or chain thanks in advance 👍
I think it will be the chain version, but the best way of checking is having a look under the bonnet
Does my 67Reg Ford Fiesta 998 cc zetec ecoboost have a wet time in belt or does it have a timeing chain.
I think it will have a the old style engine but I would need the registration to confirm unfortunately
Why were Wetbelt’s even a thing! Stupid idea
Does a 2022 ford ecosport have a wet belt?
By 2022, many 1.0L EcoBoost engines (often called the "Dragon" engine) switched to a timing chain to drive the camshafts. This is a major improvement over the older rubber belt.
But the oil pump remains a wet belt. Even on the newer chain-driven engines, the oil pump is driven by a rubber belt submerged in oil inside the engine.
J ai un ford puma ecoboost decembre 2020 automatique donc chaine de distribution j ai remarqué que la pompe a huile c est une courroie celle si a t elle une usure plus rapide vu que mon vehicule a une boite automatique
No, the belt itself doesn't wear out faster just because you have an automatic. But I know they did recall some of the Ecoboosts automatics as the oil pump belt broke up
Non, la courroie ne s'use pas plus vite simplement parce que vous avez une boîte automatique. Mais je sais qu'ils ont rappelé certains modèles EcoBoost automatiques à cause de la rupture de la courroie de la pompe à huile.
Is 2019 ford ka active 1.2 petrol chain or belt
I think it’s a belt, but to be sure I would need the registration to check
Hi, can you tell by merely looking at the engine what type of timing belt/chain it has? By the casing perhaps? I am considering buying a Focus Active 1.0 Ecoboost. Thank you.
Yeah, if you see the photos above they show both types. With the bonnet open you should be able to match it to one of them photos.
Hi just bought ecosport reg FP19XBB will this have a wet belt or chain many thanks
Hi, unfortunately this is the older style Wetbelt system
Just bought a fiesta mk8 last week, completely unaware of wetbelt issues and the turbo is mounted on the front….and yet it was registered nov 2022….how did this happen??
Following on from my previous message, the reg no is KR72YXX and it’s done 17,300 miles
Yeah that’s really late for the older style of engine. You are right it is the older engine with the Wetbelt. With that little miles I wouldn’t worry about wetbelt for now
Hi im just in the process of buying a ford focus 1.0 ecoboost 140 s-t line navigation 2018 plate. Im now panicking that this may have a wet belt and been told not to buy a car with 1. Could u possibly tell me if this would have a wet belt
Thanks
It could possibly be the newer engine being that it’s 2018. But the best thing to do is open the bonnet and have a look and compare the pictures above.
Looking to purchase a 2018 1.0 ford c max eco boost petrol from a ford dealership. It’s £7495 1 owner and done 42000 serviced every year by ford. They are also offering 2 years warranty and breakdown with this car. Just found out about the wet belt issues and now not so confident about buying please can you offer some advice.
If it has been regularly serviced they do tend to last the distance. We recommend changing it at 75k just for peace of mind. We are doing belts daily at the moment and most of them are in good condition. They do go wrong but if it has been serviced regularly I would still buy one. The engine is really reliable with enough power and cheap road tax.
Im looking to buy a fiesta 1.0 ecoboost hybrid mhev 155st line edition. Reg number BW21ATZ. would this be wet belt or chain? The dealership has no idea!
Hi, Yeah this will be chain :)
In process if buying Ford Fiesta Titanium Reg WH18FWR would this be wet belt.
It looks like this is the older Wetbelt version.
I seem to have the chain version but how often do i change the oil pump belt ?
They don’t have a service schedule, and they seem quite reliable. So it’s hard to give a time scale. The automatic ones did have an issue but they did recall them
Hi I am in the process of buying my daughters first car and was it’s a Ford Fiesta Vignale. The wetbelt know issue is concerning me. The car has done 51K can you check if it has a timing chain for me. The registration is NL18WZY. Thanks for your help.
This looks like it’s the older Wetbelt version.
I have a 22 plate Ecosport with the old style engine pictured so do I have a wet belt then
Yeah, if the exhaust is at from front with the big heat shield it will be the older Wetbelt engine
Why does a 22 plate Ford Fiesta 1 ltre ecoboost engine have a wet timing belt?