Ford Fiesta ST 1.5 EcoBoost Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK Ford Fiesta ST 1.5 EcoBoost engine specialists. Compare prices on reconditioned, rebuilt and used engines to find the most reliable and cost-effective performance solution for your vehicle.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £2,500 to £4,000 [EM-QUOTE, using Ford EcoBoost 1.5/1.6 proxy]
Used from £600 · Reconditioned from £1,600 · Common codes: YZJA
From £600
Tested, bare/short engine
From £1,600
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
Secure enquiry - no spam, no pressure. Genuine quotes only from vetted UK Ford Fiesta ST 1.5 EcoBoost specialists.
3 Simple Steps3 Simple Stepsto Finding the Best Ford Fiesta ST 1.5 EcoBoost Replacement Engineto Finding the Best Ford Fiesta ST 1.5 EcoBoost Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryFord Fiesta ST 1.5 EcoBoost - Engine History & Specs at a Glance
When the Mk8 Ford Fiesta ST launched, it introduced a highly advanced 1.5-litre three-cylinder EcoBoost engine, delivering 200 PS and featuring cylinder deactivation technology to balance hot-hatch performance with everyday efficiency.
Variant HistoryFord Fiesta ST 1.5 EcoBoost - Engine History & Specs at a Glance
When the Mk8 Ford Fiesta ST launched, it introduced a highly advanced 1.5-litre three-cylinder EcoBoost engine, delivering 200 PS and featuring cylinder deactivation technology to balance hot-hatch performance with everyday efficiency.
Ford Fiesta ST 1.5 EcoBoost
Fuel TypePetrol
Engine Size Range1.5L
Power Output Range200 PS (147 kW)Engine History Timeline
YZJA (200 PS) introduced in the Ford Fiesta ST Mk8 replacing the previous 1.6-litre four-cylinder unit. This "Dragon" engine features a timing chain for the camshafts but retains a wet belt (belt-in-oil) for the oil pump drive.
Minor ECU mapping refinements and emissions updates though the core YZJA architecture and 200 PS output remained unchanged.
Final production year of the Ford Fiesta ST Mk8 before the model line was discontinued cementing its status as a modern classic hot hatch.
Key Specs Snapshot
Fuel TypePetrolEngine Size Range1.5LPower Output Range200 PS (147 kW)Years Produced2018-2023Every engine fitted to the Ford Fiesta ST 1.5 EcoBoost is covered below, with UK rebuilt pricing and known failure points.
Ford Fiesta ST 1.5 EcoBoost Engine Codes - Specifications & Replacement CostFord Fiesta ST 1.5 EcoBoost Engine Codes - Specifications & Replacement Cost
1.5L Petrol (2018-2023)
Power Output200 PS (147 kW)Years Fitted2018-2023
Compatible Trim Levels
- ST-2
- ST-3
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£600-£1,400 [EM-QUOTE, using Ford EcoBoost 1.5/1.6 proxy]
Reconditioned
Addressed known issues, tested
£1,600-£3,000 [EM-QUOTE, using Ford EcoBoost 1.5/1.6 proxy]
Rebuilt
Full teardown, upgraded internals
£2,500-£4,000 [EM-QUOTE, using Ford EcoBoost 1.5/1.6 proxy]
Common Failure
Oil pump wet belt degradation over time, alongside carbon buildup on intake valves and occasional high-pressure fuel pump (HPFP) wear inherent to direct-injection turbocharged architectures.
The Ford Fiesta ST 1.5 EcoBoost delivers exceptional performance, but its advanced three-cylinder architecture introduces specific thermal and lubrication stresses. The YZJA code dominates replacement demand for this variant. Rebuilt engines through EnginesMarket include upgraded components addressing the original failure point, plus a minimum 12-month unlimited-mileage warranty.
Why the Ford Fiesta ST 1.5 EcoBoost Requires Vigilant Maintenance
Affected Vehicles
Ford Fiesta ST 1.5 EcoBoost (YZJA, 2018-2023)
Typical Failure Mileage
60,000-100,000 miles
Root Cause
While the camshafts are driven by a robust timing chain, the oil pump is driven by a wet belt (belt-in-oil). Over time, this belt can degrade and shed debris, potentially clogging the oil pickup strainer and leading to oil starvation if not addressed preventatively.
Why It Happens
While the camshafts are driven by a robust timing chain, the oil pump is driven by a wet belt (belt-in-oil). Over time, this belt can degrade and shed debris, potentially clogging the oil pickup strainer and leading to oil starvation if not addressed preventatively.
Dealer (parts + labour)
£1,000-£1,500
Specialist (parts + labour)
£800-£1,200
What it involves
Replacing the wet belt and full oil system flush before failure occurs.
Suitability
Highly recommended at 60k miles or 6 years to avoid catastrophic oil starvation.
1 - 2 daysDealer (parts + labour)
£4,500-£6,500+
Specialist (parts + labour)
£2,500-£4,000
What it involves
Supply & fit, upgraded components addressing the original failure point, 12-month warranty.
Suitability
Required if oil starvation has already caused bearing damage or engine seizure.
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Preventative Belt Replacement Minor | £1,000-£1,500 | £800-£1,200 | Replacing the wet belt and full oil system flush before failure occurs. | Highly recommended at 60k miles or 6 years to avoid catastrophic oil starvation. | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £4,500-£6,500+ | £2,500-£4,000 | Supply & fit, upgraded components addressing the original failure point, 12-month warranty. | Required if oil starvation has already caused bearing damage or engine seizure. | 1 - 2 days |
Our Recommendation
Our Recommendation
Given the high value and performance nature of the Ford Fiesta ST 1.5 EcoBoost, a professionally rebuilt engine with a new oil pump belt and updated components is the most reliable long-term solution. Do not attempt to run the vehicle if an oil pressure warning or sudden misfire occurs, as this can rapidly escalate to catastrophic failure.
Don't Let Engine Failure Write Off Your Ford Fiesta ST 1.5 EcoBoost
Ignoring oil pressure warnings or performance degradation can quickly turn a manageable situation into a catastrophic engine failure. By comparing quotes through EnginesMarket, you secure a rebuilt or reconditioned Ford Fiesta ST 1.5 EcoBoost engine with upgraded components, a minimum 12-month unlimited-mileage warranty, and nationwide delivery-often at a fraction of the main dealer's £6,500+ replacement premium.
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EnginesMarket's UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific Ford Fiesta ST 1.5 EcoBoost. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Ford Fiesta ST 1.5 EcoBoost Engine ReplacementFrequently Asked Questions
Question 1How much does a Ford Fiesta ST 1.5 EcoBoost engine replacement cost-
A full rebuilt or reconditioned Ford Fiesta ST 1.5 EcoBoost engine typically costs between £2,500 and £4,000, including supply and fit.
- Rebuilt units include upgraded performance components and a 12-month warranty.
- Main dealers often charge £6,500+ for the same replacement.
- Used engines are a budget alternative, starting from around £600.
Question 2Does the Ford Fiesta ST 1.5 EcoBoost have the wet belt problem-
The Ford Fiesta ST 1.5 EcoBoost uses a hybrid setup: a timing chain for the camshafts, but a wet belt for the oil pump.
- Unlike the problematic 1.0 EcoBoost, the ST's cam drive is chain-driven and highly robust.
- However, the oil pump wet belt can still degrade over time, making preventative replacement at 60,000 miles highly recommended to avoid oil starvation.
Question 3Is it worth replacing the engine in a Ford Fiesta ST 1.5 EcoBoost-
Yes, absolutely. The Ford Fiesta ST retains strong market values, typically ranging from £8,000 to £16,000.
- A full rebuilt engine replacement (£2,500-£4,000) represents a small fraction of the vehicle's total worth.
- Investing in a warrantied, reconditioned unit preserves the car's performance and resale value far better than a cheap, unverified used engine.
Question 4How long does a Ford Fiesta ST 1.5 EcoBoost engine replacement take-
A standard Ford Fiesta ST 1.5 EcoBoost engine swap typically takes 5 to 7 working days.
- This includes sourcing the correct 200 PS YZJA performance unit.
- Nationwide delivery to your chosen specialist.
- Physical installation, ECU calibration, fluid top-up, and comprehensive road testing.
Question 5What trim levels use the YZJA 1.5 EcoBoost engine-
The YZJA 1.5 EcoBoost engine was fitted exclusively to the performance-oriented trim levels of the Ford Fiesta Mk8 (2018-2023).
- Compatible trims include ST-2 and ST-3.
- Standard trims (Zetec, Titanium, ST-Line) utilised the 1.0 EcoBoost or 1.1 Duratec engines.
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