Ford 1.5 EcoBoost ST SPECIALISTS

Ford Fiesta 1.5 EcoBoost ST Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK Ford Fiesta 1.5 EcoBoost ST engine specialists. Compare prices on reconditioned, rebuilt and used engines to find the most cost-effective solution for your vehicle.

Supply & Fit Available

12-Month Warranty

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100+ Suppliers

Ford Fiesta 1.5 EcoBoost ST Engine

from£2,500 to £4,000

Usedfrom £600
Reconditionedfrom £1,600
Common codesYZJA

Ford fiesta 1.5 EcoBoost ST Used Engine — YZJA

Ford fiestaUsed Engine — YZJA

Ford fiesta 1.5 EcoBoost ST Reconditioned Engine — YZJA

Ford fiestaReconditioned Engine — YZJA

Ford fiesta 1.5 EcoBoost ST Rebuilt Engine — YZJA

Ford fiestaRebuilt Engine — YZJA

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How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

Ford Fiesta 1.5 EcoBoost ST Engine History & Specs at a Glance

Launched as the high-performance flagship of the Fiesta range, the 1.5 EcoBoost ST variant debuted in the Mk8 generation, replacing the previous 1.6L four-cylinder with a more advanced, cylinder-deactivating three-cylinder turbocharged unit.

2018
YZJA, 1.5L Petrol, 200PS (147kW) - Introduced in the Mk8 Fiesta ST, featuring a 3-cylinder EcoBoost design with cylinder deactivation for improved efficiency without sacrificing performance.
2022
YZJA (Facelift), 1.5L Petrol, 200PS (147kW) - Minor ECU and emissions refinements for the Mk8 facelift, maintaining the same core architecture and power output.

Every engine fitted to the Ford Fiesta 1.5 EcoBoost ST is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Ford Fiesta 1.5 EcoBoost ST Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

YZJA — 1.5L Petrol (2018-2023)

Power Output: 200PS (147kW)
Years Fitted: 2018-2023

Can’t find your exact engine code?-> Get quotes for YZJA Ford Fiesta 1.5 EcoBoost ST engine replacement

-> Get quotes for YZJA Ford Fiesta 1.5 EcoBoost ST engine replacement

Common Problems

Ford Fiesta 1.5 EcoBoost ST Engine Problems Repair Cost vs Replacement

The Ford Fiesta 1.5 EcoBoost ST is a high-performance unit that generally delivers strong reliability, but it is not immune to specific wear points. The YZJA code dominates replacement demand for this variant due to coolant intrusion and turbo-related failures. Rebuilt engines through EnginesMarket include upgraded components addressing these original failure points, plus a minimum 12-month unlimited-mileage warranty.

Common failure points and repair options

Coolant Intrusion & Head Gasket Failure

Affected: Ford Fiesta 1.5 EcoBoost ST (YZJA, 2018-2023)
Typical failure mileage: 60,000-100,000 miles

Root cause

Porosity in the engine block casting or head gasket degradation allows coolant to leak into the cylinders or oil galleries, creating a "milkshake" emulsion and leading to catastrophic overheating if ignored.

Repair options

Repair tier	Dealer price	Specialist price
Minor/Preventative (Head Gasket Replace)	£1,200-£2,000	£800-£1,500
Full Replacement - rebuilt/reconditioned engine	£3,500-£5,000	£2,500-£4,000

Our recommendation

For Ford Fiesta 1.5 EcoBoost ST owners, a full reconditioned or rebuilt engine is often the most reliable long-term solution. Because coolant intrusion can be a structural block issue, simply replacing the head gasket may not prevent recurrence. A rebuilt unit replaces the flawed block entirely and comes with a robust warranty, protecting your performance investment.

Turbocharger & EVAP Purge Valve Failure

Affected: Ford Fiesta 1.5 EcoBoost ST (YZJA, 2018-2023)
Typical failure mileage: 70,000-110,000 miles

Root cause

The turbocharger can suffer from oil starvation or actuator wear, while the EVAP purge valve is a known common failure point that can cause rough idling and check engine lights, sometimes mimicking more severe engine issues.

Repair options

Repair tier	Dealer price	Specialist price
Component Repair (Turbo Refurbishment & EVAP Replace)	£1,000-£1,800	£600-£1,200
Full Replacement - rebuilt/reconditioned engine	£3,500-£5,000	£2,500-£4,000

Our recommendation

-> Compare rebuilt YZJA Ford Fiesta 1.5 EcoBoost ST engine prices

Don't Let Engine Failure Write Off Your Ford Fiesta 1.5 EcoBoost ST

Whether you need a budget-friendly used unit or a comprehensively rebuilt engine with upgraded components, comparing quotes ensures you do not overpay. Every engine supplied through our network includes a minimum 12-month unlimited mileage warranty and nationwide delivery options, protecting you from main dealer premiums.

Compare Ford Fiesta 1.5 EcoBoost ST Engine Replacement Prices Now ->

FAQ

Ford Fiesta 1.5 EcoBoost ST Engine ReplacementFrequently Asked Questions

Everything Ford Fiesta 1.5 EcoBoost ST owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

A full rebuilt Ford Fiesta 1.5 EcoBoost ST engine typically costs between £2,500 and £4,000 for supply only, while used units start from around £600.

Prices vary based on the specific engine code (YZJA).
Costs differ depending on whether you choose supply-only or a nationwide supply & fit package.
Always compare multiple specialist quotes to ensure you are getting a competitive rate with a valid warranty.

-> Get free Ford Fiesta 1.5 EcoBoost ST engine quotes today

Owners of the Ford Fiesta 1.5 EcoBoost ST should watch for persistent overheating, white smoke from the exhaust, and a noticeable loss of power or limp mode.

A "milkshake" appearance on the oil filler cap indicates coolant has mixed with the engine oil.
Rough idling or an illuminated check engine light can also point to EVAP purge valve or turbo issues.
If the engine management light is flashing alongside these symptoms, stop driving immediately.

-> Compare repair vs replacement costs for your Ford Fiesta 1.5 EcoBoost ST

Given that Mk8 Ford Fiesta 1.5 EcoBoost ST models typically hold a market value between £12,000 and £22,000, a full rebuilt engine is a financially viable investment.

The replacement cost (£2,500-£4,000) comfortably sits below the 60% replacement-to-value threshold.
A rebuilt unit is highly recommended to protect your performance investment and ensure long-term reliability.
Always weigh the replacement cost against the vehicle's current market value before committing.

-> Check current used Ford Fiesta 1.5 EcoBoost ST engine prices

A standard supply-only delivery of a Ford Fiesta 1.5 EcoBoost ST engine takes 1 to 3 working days via nationwide courier.

If you opt for a supply & fit service, the physical installation and testing process typically requires 1 to 2 days at a specialist garage.
Total turnaround time from quote to completion is usually under a week.
This depends entirely on parts availability and your chosen supplier's schedule.

-> Book a fast supply & fit for your Ford Fiesta 1.5 EcoBoost ST

The 1.5 EcoBoost ST (YZJA) is a high-performance, 200PS three-cylinder unit designed specifically for the ST variant, featuring a reinforced block and advanced turbocharging.

Unlike the standard 1.0 EcoBoost, the 1.5 ST does not use a wet timing belt; it uses a more robust timing chain.
The 1.5 ST also features cylinder deactivation technology to improve fuel efficiency when cruising.
Always verify your exact engine code via your V5C logbook or registration before ordering a replacement.

-> Confirm your exact Ford Fiesta 1.5 EcoBoost ST engine code now

Why Choose Us

Compare Ford Fiesta 1.5 EcoBoost ST Engine Prices Today

Comparing quotes is completely free and carries no obligation. By entering your registration, you ensure that every quote you receive is tailored specifically to your exact Ford Fiesta 1.5 EcoBoost ST variant and engine code, protecting you from costly compatibility errors and main dealer markups.

500+500+ Ford Fiesta 1.5 EcoBoost ST engines supplied through our network

12-Month12-Month Warranty on every rebuilt Ford Fiesta 1.5 EcoBoost ST engine

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Compare quotes from trusted UK Ford Fiesta 1.5 EcoBoost ST engine specialists with warranty-backed rebuilt, reconditioned and used options nationwide.