Ford Focus ST 2.0 / 2.3 EcoBoost Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK Ford Focus ST 2.0 / 2.3 EcoBoost engine specialists. Compare prices on reconditioned, rebuilt and used engines to find the most cost-effective, high-performance solution for your vehicle.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £2,500 to £5,500 [ESTIMATED - based on UK specialist quotes for Focus ST EcoBoost engines]
Used from £1,500 · Reconditioned from £2,500 · Common codes: R9DA, R9DC, N3DA
From £1,500
Tested, bare/short engine
From £2,500
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 Focus ST 2.0 / 2.3 EcoBoost specialists.
3 Simple Steps3 Simple Stepsto Finding the Best Ford Focus ST 2.0 / 2.3 EcoBoost Replacement Engineto Finding the Best Ford Focus ST 2.0 / 2.3 EcoBoost Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryFord Focus ST 2.0 / 2.3 EcoBoost - Engine History & Specs at a Glance
When the modern EcoBoost era of the Focus ST launched, it served as the high-performance hot hatch flagship of the Ford Focus range. Over its production run, Ford transitioned from the punchy 2.0L inline-4 to the larger-displacement 2.3L inline-4 to meet higher power demands and evolving emissions standards.
Variant HistoryFord Focus ST 2.0 / 2.3 EcoBoost - Engine History & Specs at a Glance
When the modern EcoBoost era of the Focus ST launched, it served as the high-performance hot hatch flagship of the Ford Focus range. Over its production run, Ford transitioned from the punchy 2.0L inline-4 to the larger-displacement 2.3L inline-4 to meet higher power demands and evolving emissions standards.
Ford Focus ST 2.0 / 2.3 EcoBoost
Fuel TypePetrol
Engine Size Range2.0L - 2.3L
Power Output Range250hp - 280hpEngine History Timeline
R9DA / R9DC introduced 2.0L EcoBoost, 250hp (184kW), replacing the previous generation's 5-cylinder turbo, featuring a twin-scroll turbocharger and overboost function.
N3DA introduced for the Mk4 Focus ST 2.3L EcoBoost, 280hp (206kW), borrowing core architecture from the Focus RS to provide increased torque, improved thermal management, and a standard electronic limited-slip differential.
Key Specs Snapshot
Fuel TypePetrolEngine Size Range2.0L - 2.3LPower Output Range250hp - 280hpYears Produced2012-presentEvery engine fitted to the Ford Focus ST 2.0 / 2.3 EcoBoost is covered below, with UK rebuilt pricing and known failure points.
Ford Focus ST 2.0 / 2.3 EcoBoost Engine Codes - Specifications & Replacement CostFord Focus ST 2.0 / 2.3 EcoBoost Engine Codes - Specifications & Replacement Cost
2.0L Petrol (2012-2018)
Power Output250hp (184kW)Years Fitted2012-2018
Compatible Trim Levels
- Focus ST-2
- Focus ST-3
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£1,500-£2,500
Reconditioned
Addressed known issues, tested
£2,500-£3,500
Rebuilt
Full teardown, upgraded internals
£3,500-£5,000
Common Failure
Cracked piston ringlands and bottom-end failure under aggressive ECU remapping or poor fuel quality, typically reported between 40,000-80,000 miles.
The Ford Focus ST 2.0 / 2.3 EcoBoost is a highly tunable, performance-oriented engine, but its high specific output makes it susceptible to specific stress-related failures. The R9DA, R9DC, and N3DA codes dominate replacement demand for this variant. Rebuilt engines through EnginesMarket include upgraded forged components addressing these original failure points, plus a minimum 12-month unlimited-mileage warranty.
Why the Ford Focus ST 2.0 / 2.3 EcoBoost (R9DA / R9DC) Suffers Bottom-End Failure
Affected Vehicles
Ford Focus ST 2.0 / 2.3 EcoBoost (R9DA, R9DC, 2012-2018)
Typical Failure Mileage
40,000-80,000 miles
Root Cause
Aggressive ECU remapping, poor fuel quality, or inadequate intercooling can cause pre-ignition (knock). This creates extreme cylinder pressures that crack the piston ringlands, leading to catastrophic loss of compression and oil contamination.
Why It Happens
Aggressive ECU remapping, poor fuel quality, or inadequate intercooling can cause pre-ignition (knock). This creates extreme cylinder pressures that crack the piston ringlands, leading to catastrophic loss of compression and oil contamination.
Dealer (parts + labour)
£4,000-£6,000
Specialist (parts + labour)
£2,500-£3,500
What it involves
Replace the bottom end with a reinforced short block, reusing the cylinder head and turbo
Suitability
Suitable if the cylinder head and turbo are confirmed undamaged and the car is returning to stock tune
1 - 2 daysDealer (parts + labour)
£5,500-£7,500
Specialist (parts + labour)
£3,500-£5,000
What it involves
Supply & fit, upgraded forged components addressing the original failure point, 12-month warranty
Suitability
The right call for heavily modified vehicles or when top-end damage has also occurred
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 |
|---|---|---|---|---|---|
 Short Block Replacement Minor | £4,000-£6,000 | £2,500-£3,500 | Replace the bottom end with a reinforced short block, reusing the cylinder head and turbo | Suitable if the cylinder head and turbo are confirmed undamaged and the car is returning to stock tune | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £5,500-£7,500 | £3,500-£5,000 | Supply & fit, upgraded forged components addressing the original failure point, 12-month warranty | The right call for heavily modified vehicles or when top-end damage has also occurred | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
Apply this UK-wide decision framework, substituting the Ford Focus ST 2.0 / 2.3 EcoBoost-appropriate value band from research: - Vehicle worth under ~£5,000: repair or used engine typically makes more sense than a full rebuilt unit. - Vehicle worth ~£5,000-£8,000: evaluate both; reconditioned is viable if keeping the car 2+ years. - Vehicle worth ~£8,000-£15,000: reconditioned/rebuilt usually justifies the premium via warranty and reliability. - Vehicle worth £15,000+: replacement cost is typically small relative to vehicle value. A typical 2012-2018 Ford Focus ST 2.0 / 2.3 EcoBoost falls into the £8,000-£16,000 band [THIRD-PARTY]. A specialist rebuilt engine is a financially sound investment that protects the vehicle's performance value, as the replacement cost does not exceed the vehicle's market worth.
Our Recommendation
Our Recommendation
If the vehicle is heavily modified, a full rebuilt engine with forged internals is the only reliable long-term solution. For standard cars with isolated damage, a specialist short-block replacement may suffice, but a full rebuild offers superior warranty protection.
Don't Let Engine Failure Write Off Your Ford Focus ST 2.0 / 2.3 EcoBoost
Whether you are dealing with ringland cracking or carbon buildup, comparing quotes ensures you do not overpay at a main dealer. EnginesMarket connects you directly with vetted UK specialists who supply upgraded, reconditioned Ford Focus ST 2.0 / 2.3 EcoBoost engines backed by a minimum 12-month unlimited-mileage warranty and nationwide delivery or supply & fit options.
Compare rebuilt R9DA Ford Focus ST 2.0 / 2.3 EcoBoost engine prices
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 Focus ST 2.0 / 2.3 EcoBoost. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Ford Focus ST 2.0 / 2.3 EcoBoost Engine ReplacementFrequently Asked Questions
Question 1How much does a Ford Focus ST 2.0 / 2.3 EcoBoost engine replacement cost-
A complete reconditioned Ford Focus ST 2.0 / 2.3 EcoBoost engine typically costs between £2,500 and £4,500 for supply only, while fully rebuilt units with upgraded forged components range from £3,500 to £5,500. Used engines are available from around £1,500.
- Prices vary based on the specific engine code (R9DA, R9DC, or N3DA).
- Supply & fit labour will add approximately £650-£900 depending on the specialist.
- All rebuilt engines include a minimum 12-month warranty.
Question 2What are the signs of piston ringland failure in a Ford Focus ST 2.0 EcoBoost-
Piston ringland failure in the Ford Focus ST 2.0 / 2.3 EcoBoost usually presents as a sudden loss of power, excessive blue or white smoke from the exhaust, and a pronounced engine misfire.
- You may notice a drop in oil pressure or metallic knocking sounds from the bottom end.
- A compression test will reveal significantly low readings in the affected cylinder.
- Ignoring these signs can lead to catastrophic engine seizure and damage to the cylinder head.
Question 3Is it worth replacing the engine in a Ford Focus ST 2.0 / 2.3 EcoBoost-
For a Ford Focus ST 2.0 / 2.3 EcoBoost valued between £8,000 and £28,000 depending on generation, a full rebuilt engine is a financially sound investment.
- The replacement cost represents a reasonable percentage of the vehicle's total value, especially for well-maintained examples.
- A rebuilt engine with forged internals often exceeds the reliability of the original factory unit.
- For lower-value, heavily damaged early Mk3 examples, a quality used engine may be a more budget-conscious route.
Question 4Can I fit a 2.3L N3DA engine into a 2.0L R9DA Ford Focus ST-
While physically possible, fitting a 2.3L N3DA engine into a Mk3 Ford Focus ST 2.0 / 2.3 EcoBoost is not a direct bolt-on swap.
- It requires significant supporting modifications, including a custom ECU tune, different turbo plumbing, and an upgraded intercooler.
- The wiring harness and engine mounts may also require adaptation.
- We recommend consulting a specialist performance tuner before attempting this conversion to ensure compatibility and reliability.
Question 5How long does a Ford Focus ST 2.0 / 2.3 EcoBoost engine replacement take-
A standard supply and fit for a Ford Focus ST 2.0 / 2.3 EcoBoost engine typically takes 2 to 3 days once the engine has been delivered to the specialist workshop.
- Nationwide delivery of the engine usually takes 24-48 hours.
- The total turnaround time from quote acceptance to driving away is generally 4 to 6 working days.
- Complex cases involving custom tuning or seized ancillaries may require additional time.
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