Carsieve At a glance
- What it is: Ford's 1.0-litre turbo three-cylinder petrol engine, used in the Fiesta, Focus and EcoSport. The US probe covers Fiesta 2014-2017, Focus 2015-2018 and EcoSport 2018-2021.
- Main faults: a timing belt that runs in oil and can crack or break, an oil pump belt that can cut oil pressure, and coolant hoses that can burst and cause overheating.
- Belt or chain: from about 2018 some engines have a timing chain instead of a belt. The oil pump still has a wet belt.
- Reliability: 2/5, because the belt, oil pump and coolant hose faults each appear in several sources, and US regulators are looking at the belt.
- DIY: 2/5, because a belt job is a workshop job that costs about 600 EUR or more in Germany.
- Prefer and avoid: prefer a car with belt invoices, oil records in the approved spec and no coolant loss. Avoid an oil pressure warning light, low coolant, and a car past about 160,000 km (100,000 miles) or six years with no belt change.
Known issues
| Issue | Affects | Typical km | Repair cost |
|---|---|---|---|
| Wet timing belt | 1.0 EcoBoost; US probe: Fiesta 2014-2017, Focus 2015-2018, EcoSport 2018-2021 | Failures at about 70,000 miles (113,000 km) on average (US probe) | 600 to 1,500 EUR or more (Germany; one 2024 report, other prices undated) |
| Oil pump belt and oil pressure | 1.0 EcoBoost, same US probe models | Not stated | Not stated |
| Coolant hose and overheating | 1.0 EcoBoost; UK action covers Focus built October 2011 to October 2013 | Not stated | Not stated |
Before you buy
- Timing belt record (no scanner needed). Ask for a dated invoice with the mileage showing the timing belt was changed. Bad: no record, or a car past about 160,000 km (100,000 miles) or six years with no change.
- Oil pump belt (no scanner needed). Ask whether the oil pump belt was changed with the timing belt. Bad: no record of it.
- Oil pressure (test drive). Watch the dashboard on the drive. Bad: an oil pressure warning light, then a loss of power.
- Coolant (no scanner needed). Check the coolant level when the engine is cold, and look for wet stains around the hoses and the expansion tank. Bad: low coolant, a leak, or a temperature gauge that climbs.
- Coolant hose action (UK cars built October 2011 to October 2013). Ask for proof the coolant hose field service action was done. Bad: no record.
- Oil records (workshop). Ask for oil change invoices showing 5W-20 oil to Ford spec WSS-M2C948-B. Ask a workshop to check the oil strainer. Bad: a different spec, or no records.
- Recall check. Enter the VIN in the official recall check for the car's country. Bad: an open recall on the car.
Models with this engine
| Brand | Model | Generation | Production years | Power | Engine codes | ADAC versions |
|---|---|---|---|---|---|---|
| Ford | B-MAX | 1. Generation | 2012–2017 | 100–140 PS (74–103 kW) | M1JA, M1JH, SFJD, YYJC | 24 |
| Ford | C-MAX | II | 2012–2015 | 100–125 PS (74–92 kW) | M1DD, M2DC | 23 |
| Ford | C-MAX | II facelift | 2015–2019 | 100–125 PS (74–92 kW) | M1DD, M2DC | 36 |
| Ford | EcoSport | 1. Generation | 2014–2017 | 125–140 PS (92–103 kW) | M1JU, YYJF | 8 |
| Ford | EcoSport | 1. Generation facelift | 2017–2022 | 100–140 PS (74–103 kW) | M1JU, SFJL, YYJF | 41 |
| Ford | Fiesta | VII facelift | 2013–2017 | 65–140 PS (48–103 kW) | M1JH, P4JD, SFJD, XMJD, YYJB | 112 |
| Ford | Fiesta | VIII | 2017–2022 | 85–155 PS (63–114 kW) | B7JB, BZJA, M0JB, M1JP, Q0JC, SFJP, YYJG | 263 |
| Ford | Fiesta | VIII facelift | 2022–2023 | 100–155 PS (74–114 kW) | B7JB, BZJA, Y7JA | 55 |
| Ford | Focus | III | 2012–2014 | 100–125 PS (74–92 kW) | M1DF, M2DC, SFDB | 30 |
| Ford | Focus | III facelift | 2014–2018 | 100–140 PS (74–103 kW) | M1DF, M1DH, M2DC, SFDB | 53 |
| Ford | Focus | IV | 2018–2022 | 85–155 PS (63–114 kW) | B3DA, B7DA, B7DC, M0DC, SFDC | 174 |
| Ford | Focus | IV facelift | 2022–2025 | 100–155 PS (74–114 kW) | B3DA, B7DA, B7DC, M0DC, R0DB | 192 |
| Ford | Mondeo | V | 2015–2018 | 125 PS (92 kW) | M1CB | 4 |
| Ford | Puma | II | 2020–2024 | 95–160 PS (70–117 kW) | B7JA, B7JB, BZJA, M0JA, Q0JA | 62 |
| Ford | Puma | II facelift | since 2024 | 125–160 PS (92–117 kW) | B7JB, BZJA, Q0JA | 29 |
| Ford | Tourneo Connect | 2. Generation | 2013–2018 | 100 PS (74 kW) | M2GB | 6 |
| Ford | Tourneo Connect | 2. Generation facelift | 2018–2019 | 100 PS (74 kW) | M2GB | 3 |
| Ford | Tourneo Courier | 1. Generation | 2014–2018 | 100 PS (74 kW) | SFCF | 14 |
| Ford | Tourneo Courier | 2. Generation | since 2023 | 125 PS (92 kW) | B7NB | 12 |
| Ford | Transit Connect | 2. Generation facelift | 2018–2024 | 100 PS (74 kW) | M2GB | 14 |
| Ford | Transit Courier | 1. Generation | 2014–2018 | 100 PS (74 kW) | SFCF | 12 |
| Ford | Transit Courier | 1. Generation facelift | 2018–2023 | 100 PS (74 kW) | SFCF | 14 |
In detail
Wet timing belt
Symptoms. The belt can crack, wear or break. The US probe describes a low oil pressure warning light, then a sudden loss of power, sometimes with no warning.
Cause. The belt runs in engine oil. German sources name the wrong or unapproved engine oil as a cause of belt damage.
Which cars. The US probe covers Fiesta 2014-2017, Focus 2015-2018 and EcoSport 2018-2021.
Fix. Ford cut the recommended interval from 150,000 miles (about 240,000 km) to 100,000 miles (about 160,000 km) or six years, in a notice to US regulators on 2 June 2026. The notice is for US cars. The sources give no new interval for Germany. The sources give no revised part number and no fix procedure.
Cost. Germany: 600 to 1,500 EUR or more, parts and labour. A 2024 press report says 1,500 EUR and more. A garage site says 600 to 1,500 EUR, and a booking portal says from about 830 EUR. Both have no year.
Recalls. US probe, not a recall. See the Recalls table.
Sources: AutoGuide, NHTSA upgrades probe, Autopian, wet belt engine failures, AUTO BILD, belt problems, carwiki, Focus belt change
Oil pump belt and oil pressure
Symptoms. The oil pressure warning comes on, then the engine loses power. In some cases the power goes with no warning.
Cause. A wet belt also drives the oil pump. The sources link damage to this belt with lost oil pressure.
Which cars. The same models as the timing belt probe. The sources give no build range for the oil pump belt alone.
Fix. The sources name no fix for the oil pump belt.
Cost. Not stated.
Recalls. A US recall in late 2023 covered Focus 2016-2018 and EcoSport 2018-2022. The sources do not say clearly whether it fixes the oil pump. See the Recalls table.
Sources: Yahoo Autos, Ford oil pumps, AUTO BILD, belt problems
Coolant hose and overheating
Symptoms. Coolant leaks from the hose or the degas pipe to the expansion tank. The engine overheats.
Cause. The degas pipe carries hot steam from the water-cooled turbo back to the expansion tank. A weak pipe leaks. Overheating can cause head gasket failure, and in some cases a new engine.
Which cars. The UK 2015 action covers Focus 1.0 cars built October 2011 to October 2013. Owners of other years also report hose failures.
Fix. The UK action reworked the coolant hose. Ford says 96% of affected cars were reworked. The sources give no part numbers.
Cost. Not stated.
Sources: Express & Star, Ford to pay for repairs, Automotive Powertrain Technology International, Ford reimbursement, DRIVE2, Focus Wagon 1.0 history
Recalls
| Country | Code | Years or build range | What is done |
|---|---|---|---|
| UK | Field service action, March 2015 (no number given) | Focus 1.0 built October 2011 to October 2013 | Coolant hose reworked. Ford says 96% of affected cars were reworked |
| US | Recall, late 2023 (no number given) | Focus 2016-2018, EcoSport 2018-2022 | Part and remedy not stated clearly in the sources |
| US | NHTSA investigation EA26004, opened as PE25020 on 18 December 2025 | Fiesta 2014-2017, Focus 2015-2018, EcoSport 2018-2021 | Not a recall. Investigates timing belt failure |
| US | Customer satisfaction programme, notified 2 June 2026 (no number given) | Not stated | Not a safety recall. Timing belt interval cut to 100,000 miles or six years |
Maintenance
- Timing belt. Ford's original interval was 150,000 miles, given in German sources as up to 240,000 km. Ford now recommends 100,000 miles (about 160,000 km) or six years.
- Oil. Use 5W-20 oil to Ford spec WSS-M2C948-B. German press and a Russian owner's service record both name this spec.
- Oil strainer. Have a workshop check the oil strainer regularly. One German press report says every third or fourth oil change.
- Oil change interval. The sources give no Ford interval.
- Coolant. The sources give no coolant service interval.
Sources
English
- AutoGuide, NHTSA upgrades probe into Ford 1.0L EcoBoost
- Autopian, wet belt engine failures
- AutoEvolution, wet timing belt investigation
- Club Alfa, Ford 1.0L EcoBoost under NHTSA
- Yahoo Autos, self-clogging Ford oil pumps
- CarComplaints, NHTSA EA26004 timing belt failure
- Express & Star, Ford to pay for repairs
- Automotive Powertrain Technology International, Ford reimbursement
German
- AUTO BILD, Zahnriemen-Probleme bei Ford EcoBoost-Motoren
- Nau.ch, Ford EcoBoost Motoren
- carwiki, Zahnriemenwechsel des Ford Focus
- repareo, Zahnriemenwechsel Ford Fiesta