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Subaru EJ255 Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The Subaru EJ255 is a 2.5-litre turbocharged flat-four boxer engine fitted to performance-focused Subaru models including the Impreza WRX, Forester XT and Legacy GT. Reconditioned units from £2,200 - one of the UK's most-requested performance Subaru engines.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£1,800
Reconditioned from
£2,200
Rebuilt from
£3,500
GB
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Quotes only from vetted UK engine specialists.
Key Specs
Subaru EJ255 - Specifications at a Glance
Engine Code
EJ255
Fuel
Petrol
Configuration
2.5L turbocharged flat-four (Boxer), DOHC 16-valve
Power Output(s)
230-265 hp (169-195 kW) depending on model/year
Years Produced
2003-2014 (UK market: 2005-2014)
UK Models Fitted
5 models - full list in Compatibility below
2025 UK Replacement Requests
[Not in proprietary data - see compatibility demand]
Replaced
EJ20 (2.0L turbo)
Replaced By
FA20 / FA24 (2.0L / 2.4L direct-injection turbo)
Most Common Failure
Head gasket failure / turbocharger wear
Reconditioned Price Range
£2,200-£4,000 supply-only
Vetted UK specialists for EJ255 replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which Subaru Models Use the EJ255-
The EJ255 was Subaru's mainstream 2.5-litre turbocharged boxer engine, fitted across the performance-oriented end of the range from 2003 through 2014. The Impreza WRX accounts for the highest volume of UK enquiries, followed closely by the Forester XT.
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 Subaru Impreza WRX | GD/GG (2005-2007) | WRX | 2005-2007 | |
| Subaru Impreza WRX | GE/GH (2007-2014) | WRX | 2007-2014 | |
| Subaru Forester XT | SG (2003-2008) | XT | 2003-2008 | |
| Subaru Forester XT | SH (2008-2013) | XT, S-Edition | 2008-2013 | |
| Subaru Legacy GT | BL/BP (2003-2009) | GT, GT Spec.B | 2003-2009 | |
| Subaru Legacy GT | BM/BR (2009-2014) | GT | 2009-2014 | |
| Subaru Outback XT | BL/BP (2003-2009) | XT | 2003-2009 | |
| Subaru Tribeca | WX (2005-2014) | - | 2005-2014 |
02
Subaru Impreza WRX
03
Subaru Forester XT
04
Subaru Forester XT
05
Subaru Legacy GT
06
Subaru Legacy GT
07
Subaru Outback XT
08
Subaru Tribeca
CROSS-BRAND
EJ255 is documented across 8 BMW applications spanning Subaru Impreza WRX, Subaru Forester XT, Subaru Legacy GT, Subaru Outback XT, Subaru Tribeca. Registration lookup confirms the exact suffix before quotes are sent.
Not sure which engine your car has?
Not sure which engine your car has- Enter your registration above - we'll confirm your exact EJ255 fitment before any quotes are sent.
Prices
Subaru EJ255 Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £1,800-£2,800 | £2,600-£3,800 | 3-6 months |
Reconditioned | £2,200-£4,000 | £3,200-£5,200 | 12-24 months |
Rebuilt | £3,500-£5,500 | £4,700-£6,700 | 12-24 months |
All from - based on UK Subaru specialist supply data and marketplace validation. Fitted = supply price + labour band below.
Labour Guide
Fitting an EJ255 typically takes 10-14 hours at £65-£85/hr (independent Subaru specialist) - confirm exact labour when comparing quotes.
Price Factors
What genuinely moves the price for THIS engine: whether the head gaskets have been replaced with upgraded multi-layer steel (MLS) units, the condition of the turbocharger, and whether the timing belt service has been completed. A used EJ255 with no documented head gasket history is a significantly higher-risk purchase than one with documented MLS gasket replacement. See our full reconditioned engine cost guide.
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Common Problems
Subaru EJ255 Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the EJ255, based on real-world data and verified failure patterns.
Verified issue focus: Head gasket failure / turbocharger wear.
Post-2008 EJ255 units received revised ECU calibration and some internal improvements, but the fundamental head gasket and timing belt vulnerabilities remain across the entire production run. The best EJ255 to buy is one with documented head gasket replacement (MLS) and timing belt service already completed .
Compare rebuilt EJ255 prices with the failures already addressed
Engine Variants
EJ255 Sub-Codes Explained - Which One Is in Your Car-
INTRO: While "EJ255" is used as a single engine code, there are several distinct revisions across the production run. The differences matter - particularly when buying a replacement, as not all EJ255 variants are direct swaps. ### EJ255 Version 1 - 2003-2005 (SG Forester XT, early Legacy GT) - Fitted to: Subaru SG Forester XT (2003-2005) , Subaru BL/BP Legacy GT (2003-2005) - Key technical difference: Uses the AB440 shortblock - the same shortblock as the 2004-2006 STI EJ257 . Single AVCS, TD04 turbocharger. Power: 155kW (208 hp) at 5600rpm, 320Nm at 3600rpm . - Sub-code-specific failure note: Shares the family head gasket and turbo failure patterns above. Early versions are more prone to oil starvation issues. - Interchange note: Direct swap with later EJ255 variants requires ECU reflash and may need different turbo plumbing. ### EJ255 Version 2 - 2005-2008 (GD/GG Impreza WRX, SG Forester XT) - Fitted to: Subaru GD/GG Impreza WRX (2005-2007) , Subaru SG Forester XT (2005-2008) - Key technical difference: Revised compression ratio (9.0:1 vs 8.2:1), power increased to 169kW (227 hp) at 5600rpm . Single AVCS, TD04 turbo. - Sub-code-specific failure note: Shares the family patterns. - Interchange note: Direct swap with Version 1 requires ECU update; physical mounting is identical. ### EJ255 Version 3 - 2008-2014 (GE/GH Impreza WRX, SH Forester XT) - Fitted to: Subaru GE/GH Impreza WRX (2007-2014) , Subaru SH Forester XT (2008-2012) - Key technical difference: Revised cylinder heads (D25 heads) , revised ECU calibration. Power: 169kW (227 hp) at 5200rpm, 320Nm at 2800rpm for standard WRX ; 195kW (262 hp) at 6000rpm, 343Nm at 4000rpm for later WRX (2008-2014) . VF52 turbo on later WRX models (instead of TD04). - Sub-code-specific failure note: The VF52 turbo is more durable than the TD04 but still suffers oil starvation if maintenance is poor. - Interchange note: Not a straight swap with earlier EJ255 versions - ECU, turbo, and wiring loom differ significantly. ### EJ255 S-Edition - 2011-2012 (SH Forester S-Edition) - Fitted to: Subaru SH Forester S-Edition (2011-2012) - Key technical difference: Higher state of tune - 193kW (259 hp) at 6000rpm, 347Nm at 2800-4800rpm . 5-speed automatic only. Dual AVCS. - Sub-code-specific failure note: Higher boost places additional stress on head gaskets and turbo. Shares the family failure patterns but at slightly elevated risk. - Interchange note: Not a straight swap with manual-transmission EJ255s - ECU, loom, and transmission compatibility differ.
The engine code is stamped on the top of the engine block, near the bellhousing mating face, typically visible from above with a torch. It's also listed on the V5C registration document and can be confirmed via the Subaru VIN decoder. Enter your registration above if you're unsure - we'll confirm your exact EJ255 variant before any quotes are sent.
Easily Confused
EJ20
- the 2.0-litre turbo that preceded the EJ255; it’s smaller-displacement, revs higher, but delivers less low-end torque and was phased out in the UK around 2005.
Alternative / Next-Gen Code
FA20
and - the direct-injection successors. The FA20 (2012+) brought improved fuel economy and lower emissions; the FA24 (2019+) delivers more power and torque with modern efficiency. Both address the EJ255’s head-gasket and timing-belt vulnerabilities with chain-driven camshafts.
Related JLR Variants
EJ257
- the STI-spec 2.5-litre turbo. It shares the basic block but features stronger internals (forged pistons, better rods), a larger turbo (VF48), and 300 hp. Not a direct swap into an EJ255 car without ECU and loom changes.
Confirm the exact EJ255 fitment
The engine code is stamped on the top of the engine block, near the bellhousing mating face, typically visible from above with a torch. It's also listed on the V5C registration document and can be confirmed via the Subaru VIN decoder. Enter your registration above if you're unsure - we'll confirm your exact EJ255 variant before any quotes are sent.
Buying Guide
Buying a Replacement EJ255 - What to Choose
Choosing the right replacement route depends on your budget, risk tolerance, and ownership goals. Here's a breakdown of your options.
Used:
A used EJ255 makes sense only if it comes with documented evidence of head gasket replacement (MLS units) and a recent timing belt service. Without this documentation, a used EJ255 is a high-risk purchase - head gasket failure can appear within months of installation, and a broken timing belt writes off the engine. Given the EJ255 is an interference engine, any used unit without belt history is a gamble.
Reconditioned:
A proper EJ255 recon addresses the known weak points: new MLS head gaskets (not factory-spec), new timing belt kit with tensioner and idlers, new water pump, new turbocharger oil feed lines, and a thorough inspection of the turbocharger itself. Reconditioned units typically include a 12-month warranty and are the sweet spot for most UK owners - you get the reliability upgrades without the cost of a full rebuild.
Rebuilt:
A full EJ255 rebuild is justified when you want to keep a specific vehicle (e.g. a clean Impreza WRX or Forester XT with low body mileage) and want the engine to last another 100,000+ miles. An upgraded rebuild should include forged pistons (the factory cast pistons are a weak point on higher-mileage units), ARP head studs, a fully reconditioned turbocharger, and a new oil pump. Budget £3,500-£5,500 for a quality rebuild.
Supply & Fit Line:
All of our vetted UK Subaru specialists offer supply-only or full supply-and-fit - nationwide delivery and recovery available, with warranties that cover both parts and labour.
Vehicle Value Note:
The EJ255 sits in performance Subarus with strong enthusiast following - Impreza WRX values range from £3,000-£12,000 depending on condition and mileage; Forester XT values £3,000-£9,000; Legacy GT £2,500-£8,000. A reconditioned EJ255 at £2,200-£4,000 represents 25-60% of vehicle value - generally viable for most examples. However, for a high-mileage (£3,000-£4,000) Impreza WRX or Forester XT, a full rebuild at £5,500 may approach or exceed the vehicle's value. In those cases, evaluate the car's overall condition, rust, and interior before committing. A clean, low-mileage example justifies the spend; a tired one may be better broken for parts .
Compare EJ255 Engine Prices Now --- **
Related Engines
Engines Related to the Subaru EJ255
Explore engines that are closely related to the Subaru EJ255, including its predecessor, successor, and key family variants.
Predecessor
EJ20
- the 2.0-litre turbo that preceded the EJ255; it’s smaller-displacement, revs higher, but delivers less low-end torque and was phased out in the UK around 2005.
Successor
FA20
and - the direct-injection successors. The FA20 (2012+) brought improved fuel economy and lower emissions; the FA24 (2019+) delivers more power and torque with modern efficiency. Both address the EJ255’s head-gasket and timing-belt vulnerabilities with chain-driven camshafts.
Sibling
EJ257
- the STI-spec 2.5-litre turbo. It shares the basic block but features stronger internals (forged pistons, better rods), a larger turbo (VF48), and 300 hp. Not a direct swap into an EJ255 car without ECU and loom changes.
FAQ
Subaru EJ255Frequently Asked Questions
Question 1How much does a Subaru EJ255 engine replacement cost-
A reconditioned EJ255 supply-only costs £2,200-£4,000, with fitted prices from £3,200-£5,200. Used units start from £1,800 supply-only. Rebuilt engines with upgraded internals cost £3,500-£5,500 supply-only.
- Used units start from £1,800 supply-only.
- Rebuilt engines with upgraded internals cost £3,500-£5,500 supply-only.
Question 2What are the most common EJ255 engine problems-
The EJ255 suffers from head gasket failure (typically 80k-120k miles), turbocharger wear (90k-150k miles), and timing belt failure if the 105k-mile/105-month service is missed. Head gasket replacement with MLS upgrades costs £1,200-£2,500. Turbo rebuild £400-£800; new turbo £600-£1,500. Preventative timing belt service £500-£900.
- Head gasket replacement with MLS upgrades costs £1,200-£2,500.
- Turbo rebuild £400-£800; new turbo £600-£1,500.
- Preventative timing belt service £500-£900.
Question 3Which Subaru models use the EJ255 engine-
The EJ255 was fitted to the Subaru Impreza WRX (2005-2014), Forester XT (2003-2013), Legacy GT (2003-2014), Outback XT (2003-2009), and Tribeca (2005-2014). Check your model’s compatibility
- The Impreza WRX is the highest-volume application.
- Forester XT and Legacy GT are also common in the UK.
Question 4Should I buy a used or reconditioned EJ255-
A reconditioned EJ255 is the safer choice - it includes new MLS head gaskets, a full timing kit, and a 12-month warranty. Used units are only recommended if they come with documented head gasket and timing belt history. A used EJ255 without history is a high-risk purchase.
- Used units are only recommended if they come with documented head gasket and timing belt history.
- A used EJ255 without history is a high-risk purchase.
Question 5What’s the difference between EJ255 and EJ257-
The EJ257 is the STI-spec version with stronger internals (forged pistons, better rods), a larger turbo (VF48), and 300 hp versus the EJ255’s 227-265 hp. See the EJ257 page for details
- The EJ255 is more common and cheaper to replace.
- The EJ257 is not a direct drop-in replacement without ECU and wiring changes.
Question 6How long does an EJ255 engine last-
With regular servicing (oil changes every 5k-6k miles) and timely timing belt replacements, an EJ255 can exceed 150,000 miles. Head gasket failure often occurs around 80k-120k miles unless upgraded. Turbocharger life depends on oil quality and driving style.
- Head gasket failure often occurs around 80k-120k miles unless upgraded.
- Turbocharger life depends on oil quality and driving style.
Compare Subaru EJ255 Engine Prices Today
Get free, no-obligation EJ255 engine quotes tailored to your exact sub-code and model. Our registration lookup confirms fitment before any quotes are sent, so you only hear from specialists who can actually supply the right unit. With reconditioned EJ255 units from £2,200, comparing takes two minutes and could save four figures.
Vetted UK Specialists
Vetted UK specialists for EJ255 replacements
Minimum 12-Month Warranty
Minimum 12-month warranty on reconditioned and rebuilt options
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