How much does a Ford Kuga ST-Line 1.5 EcoBoost engine replacement cost-

A full rebuilt or reconditioned Ford Kuga ST-Line 1.5 EcoBoost engine typically costs between £2,500 and £4,000, including supply and fit. Rebuilt units include upgraded components and a 12-month warranty. Main dealers often charge £5,000+ for the same replacement. Used engines are a popular budget alternative, starting from around £600.

Does the Ford Kuga 1.5 EcoBoost have the wet belt problem-

Yes, the Ford Kuga 1.5 EcoBoost (including ST-Line variants) uses a "wet belt" (belt-in-oil) design. The timing belt runs inside the engine oil and can degrade over time. If not replaced preventatively (typically every 6 years or 60,000 miles), it sheds debris that blocks the oil pickup, causing catastrophic engine seizure. This is the single most common reason for Ford Kuga ST-Line 1.5 EcoBoost engine replacements.

Is it worth replacing the engine in a Ford Kuga ST-Line 1.5 EcoBoost-

It depends on the vehicle's current market value and overall condition. For older Mk2 models valued under £9,000, a full rebuilt engine replacement may approach 40-50% of the vehicle's value, making a low-mileage used engine or preventative repair more sensible. For newer Mk3 models valued over £12,000, a reconditioned or rebuilt engine with a 12-month warranty is a financially sound investment to preserve the vehicle's sporty utility.

How long does a Ford Kuga ST-Line 1.5 EcoBoost engine replacement take-

A standard Ford Kuga ST-Line 1.5 EcoBoost engine swap typically takes 5 to 7 working days. This includes sourcing the correct engine code (e.g., M1JA, M1JC, or YYJA), nationwide delivery to your chosen specialist, and physical installation, fluid top-up, and comprehensive road testing.

What is the difference between the M1JA and YYJA Ford Kuga 1.5 EcoBoost engines-

Both are 1.5-litre turbocharged petrol engines from the same EcoBoost family, but they belong to different generations. The M1JA (2015-2018) is a Mk2 engine producing 150 PS. The YYJA (2020-present) is a Mk3 engine available in 120 PS or 150 PS outputs, featuring updated engine management and start-stop technology. Both share the wet belt architecture, meaning the same preventative maintenance rules apply to both.

Ford ST-Line 1.5 EcoBoost SPECIALISTS

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Ford Kuga ST-Line 1.5 EcoBoost Engine

from£2,500 to £4,000...

Usedfrom £600
Reconditionedfrom £1,600
Common codesM1JA, M1JC, M1JJ

Ford kuga ST-Line 1.5 EcoBoost Used Engine — M1JA

Ford kugaUsed Engine — M1JA

Ford kuga ST-Line 1.5 EcoBoost Reconditioned Engine — M1JA

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Ford kuga ST-Line 1.5 EcoBoost Rebuilt Engine — M1JA

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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 Kuga ST-Line 1.5 EcoBoost Engine History & Specs at a Glance

When the ST-Line trim was paired with the 1.5 EcoBoost engine, it brought sporty aesthetics and punchy performance to the Kuga range, though its "wet belt" architecture requires vigilant maintenance to prevent catastrophic failure.

2015
M1JA (150 PS) introduced in the Ford Kuga Mk2 ST-Line, establishing the 1.5-litre turbocharged petrol as the performance-oriented choice for the trim.
2018
M1JC / M1JJ (150 PS) introduced with minor revisions to the wet belt and oil pump drive belt materials following early wear concerns, though the core belt-in-oil architecture remained.
2020
YYJA / YYJB (120 PS / 150 PS) introduced in the Ford Kuga Mk3 ST-Line, featuring improved overall durability and start-stop technology, but still requiring strict adherence to Ford-specific oil change intervals.

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

Engine Codes & Pricing

Ford Kuga ST-Line 1.5 EcoBoost Engine Codes Specifications & Replacement Cost

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

M1JA — 1.5L Petrol (2015-2018)

Power Output: 150 PS (110 kW)
Years Fitted: 2015-2018

Can’t find your exact engine code?-> Get quotes for M1JA Ford Kuga ST-Line 1.5 EcoBoost engine replacement

-> Get quotes for M1JA Ford Kuga ST-Line 1.5 EcoBoost engine replacement

Common failure points and repair options

Wet Belt Degradation & Oil Starvation

Affected: Ford Kuga ST-Line 1.5 EcoBoost (M1JA, M1JC, M1JJ, YYJA, 2015-present)
Typical failure mileage: 60,000-100,000 miles

Root cause

The timing belt runs in engine oil. Over time, petrol contamination and heat cause the belt to degrade, shedding rubber debris that blocks the oil pump pickup strainer, leading to a drop in oil pressure and catastrophic engine seizure.

Repair options

Repair tier	Dealer price	Specialist price
Preventative Belt Replacement	£1,200-£1,800	£800-£1,500
Full Replacement - rebuilt/reconditioned engine	£4,500-£6,500+	£2,500-£4,000

Our recommendation

If your Ford Kuga ST-Line 1.5 EcoBoost is showing early warning signs (rattling on cold start, coolant loss, or oil pressure warning), pursue preventative belt replacement or cooling system repair immediately. If the engine has already seized or suffered severe overheating, a reconditioned or rebuilt unit is the most reliable long-term solution, provided the vehicle's value justifies the investment.

Coolant Intrusion & Head Gasket Failure

Affected: Ford Kuga ST-Line 1.5 EcoBoost (M1JA, M1JC, early YYJA)
Typical failure mileage: 50,000-90,000 miles

Root cause

Early iterations of the 1.5 EcoBoost block exhibited porosity or head gasket weaknesses, allowing coolant to seep into the combustion chambers, leading to overheating and potential hydrolock if ignored.

Repair options

Repair tier	Dealer price	Specialist price
Head Gasket Replacement	£1,800-£2,500	£1,200-£2,000
Full Replacement - rebuilt/reconditioned engine	£4,500-£6,500+	£2,500-£4,000

Our recommendation

-> Compare rebuilt M1JA/M1JC Ford Kuga ST-Line 1.5 EcoBoost engine prices

Don't Let Engine Failure Write Off Your Ford Kuga ST-Line 1.5 EcoBoost

Ignoring wet belt warnings or coolant leaks can quickly turn a manageable repair into a catastrophic engine failure. By comparing quotes through EnginesMarket, you secure a rebuilt or reconditioned Ford Kuga ST-Line 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 replacement premium.

Compare Ford Kuga ST-Line 1.5 EcoBoost Engine Replacement Prices Now ->

FAQ

Ford Kuga ST-Line 1.5 EcoBoost Engine ReplacementFrequently Asked Questions

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

A full rebuilt or reconditioned Ford Kuga ST-Line 1.5 EcoBoost engine typically costs between £2,500 and £4,000, including supply and fit.

Rebuilt units include upgraded components and a 12-month warranty.
Main dealers often charge £5,000+ for the same replacement.
Used engines are a popular budget alternative, starting from around £600.

-> Compare Ford Kuga ST-Line 1.5 EcoBoost engine replacement quotes today.

Yes, the Ford Kuga 1.5 EcoBoost (including ST-Line variants) uses a "wet belt" (belt-in-oil) design.

The timing belt runs inside the engine oil and can degrade over time.
If not replaced preventatively (typically every 6 years or 60,000 miles), it sheds debris that blocks the oil pickup, causing catastrophic engine seizure.
This is the single most common reason for Ford Kuga ST-Line 1.5 EcoBoost engine replacements.

-> Get quotes for your Ford Kuga ST-Line 1.5 EcoBoost engine today.

It depends on the vehicle's current market value and overall condition.

For older Mk2 models valued under £9,000, a full rebuilt engine replacement may approach 40-50% of the vehicle's value, making a low-mileage used engine or preventative repair more sensible.
For newer Mk3 models valued over £12,000, a reconditioned or rebuilt engine with a 12-month warranty is a financially sound investment to preserve the vehicle's sporty utility.

-> Check if your Ford Kuga ST-Line 1.5 EcoBoost replacement is viable.

Both are 1.5-litre turbocharged petrol engines from the same EcoBoost family, but they belong to different generations.

The M1JA (2015-2018) is a Mk2 engine producing 150 PS.
The YYJA (2020-present) is a Mk3 engine available in 120 PS or 150 PS outputs, featuring updated engine management and start-stop technology.
Both share the wet belt architecture, meaning the same preventative maintenance rules apply to both.

-> Get quotes for your specific Ford Kuga ST-Line 1.5 EcoBoost engine code.

Why Choose Us

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Comparing quotes is completely free and specific to your exact vehicle. Simply enter your registration to confirm your exact Ford Kuga ST-Line 1.5 EcoBoost engine code, and we will match you with vetted UK specialists offering competitive, affordable prices on used, reconditioned, and rebuilt units.

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