Baja Naturally Aspirated Engines
from £895 to £2,100
Rebuilt units from £895 · Common codes: EJ251, EJ252, EJ253
Subaru ENGINE MARKETPLACE
Subaru Baja Engine Replacement - Reconditioned & Used Prices Compared
Get quotes from trusted UK Subaru Baja engine specialists. Compare reconditioned, rebuilt and used prices for 2.5L H4 - EJ251, EJ253 & EJ255 covered. Compare supply & fit options today.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Baja Turbo Engines
from £1,495 to £3,200
Rebuilt units from £1,495 · Common codes: EJ255
Baja Donor-Compatible Engines
from £795 to £1,950
Rebuilt units from £795 · Common codes: EJ251, EJ252, EJ255
Instant engine replacement quote - 100% free, no obligation
Engine replacement near me - UK-wide specialist network
Compare reconditioned, rebuilt & used engine prices
Supply & fit available - parts and labour from vetted specialistsInstant engine replacement quote - 100% free, no obligationEngine replacement near me - UK-wide specialist networkCompare reconditioned, rebuilt & used engine pricesSupply & fit available - parts and labour from vetted specialistsHow It Works
3 Simple Steps3 Simple Stepsto Finding the Best Subaru Baja Replacement Engineto Finding the Best Subaru Baja Replacement Engine
12-Month Warranty
Supply & Fit Available
Nationwide Delivery
Trusted UK Suppliers
Most replacements completed within 3-5 days.
Live UK Engine Market Data
Average Market Prices
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↻ Last updated: 4 Aug 26, 9:26
Customer Reviews
Trusted by Subaru Baja Owners Across the UK
Rated 4.8 out of 5 by 1,081 verified customers who sourced reconditioned and used Subaru Baja engines through EngineMarket.
4.8
★★★★★
out of 5
1,081 verified reviews
★★★★★
“Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
JJimmyGoogle
★★★★★
“Got three quotes within an hour and chose the best deal easily. The whole process was quick, clear and stress-free.”
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“I wasn't sure what I needed, but they helped me identify the right engine and connected me with a trusted garage.”
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★★★★★
“Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
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Variants We Cover
Subaru Baja Engine ReplacementAll Variants Covered
Subaru Baja Base
EJ251 2.5L Petrol
Rebuilt Engines: £895-£2,100
Subaru Baja Sport
EJ252 2.5L Petrol
Rebuilt Engines: £895-£2,100
Subaru Baja 2.5 Naturally Aspirated
EJ251/EJ252 2.5L Petrol
Rebuilt Engines: £895-£2,100
Subaru Baja Turbo
EJ255 2.5L Petrol
Rebuilt Engines: £1,495-£3,200
Subaru Baja Turbo Limited
EJ255 2.5L Petrol
Rebuilt Engines: £1,495-£3,200
Subaru Baja 2.5 Turbo
EJ255 2.5L Petrol
Rebuilt Engines: £1,495-£3,200
Subaru Baja Grey Import
EJ251/EJ252/EJ255 2.5L Petrol
Rebuilt Engines: £895-£3,200
Subaru Baja Legacy Donor Compatible
EJ 2.5L Petrol
Rebuilt Engines: £795-£2,800
Subaru Baja AWD Boxer
EJ 2.5L Petrol
Rebuilt Engines: £895-£3,200
Subaru Baja Pre-Facelift
EJ251/EJ252 2.5L Petrol
Rebuilt Engines: £895-£2,100
Subaru Baja Facelift
EJ252/EJ255 2.5L Petrol
Rebuilt Engines: £895-£3,200
Subaru Baja Rally Off-Road
EJ255 2.5L Petrol
Rebuilt Engines: £1,495-£3,200
Not sure which variant your Subaru Baja is- Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.
Baja
Engine Codes
Subaru Baja Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the Subaru Baja across all generations, with technical specs, compatible variants and trims, known failure points, and average rebuilt prices from UK specialists. Select any engine code to compare quotes.
Petrol Engines
Extracted from detailed petrol and performance engine families across Subaru Baja variants.
EJ251 - 2.5L Petrol
Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
Compatible variants
BaseBase Sport TrimEarly Sport
Avg. rebuilt price
£895 - £2,100
Supply only
Technical specifications
- Fuel type
- Petrol
- Engine size
- 2.5L
- Power output
- 165-168 hp
- Years fitted
- 2002-2006
Common failures
- ●Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
- ●Confirm exact engine code and fitment before ordering.
- ●Ask for warranty and supply & fit terms.
Not sure which engine code?
Can't find your engine code- Enter your registration number above - we'll instantly identify the exact unit, its technical specifications, and live replacement prices from UK Subaru Baja engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.
Baja
Common Problems
Subaru Baja Engine Problems - What It Costs to Fix & When Replacement Makes Sense
The Subaru Baja's EJ25-series boxer engines are robust but share common failure points with Legacy and Outback donors. Head gasket failure dominates replacement enquiries, followed by turbo issues on EJ255 units. Every rebuilt engine supplied through EngineMarket includes upgraded multi-layer steel head gaskets and a minimum 12-month unlimited mileage...
Head Gasket Failure - Why Subaru Baja EJ25 Engines Fail Prematurely
Head Gasket Failure
Most affected vehicles
Subaru Baja BaseSport
Subaru Baja Base, Sport, Turbo, Turbo Limited (2002-2006, EJ251/EJ252/EJ255)
Failure mileage range
80,000-120,000 miles
Typical failure window
Root cause
Original single-layer composite gaskets degrade under heat cycles and boxer engine vibration, allowing coolant/oil cross-contamination.
Repair options & estimated costs (UK ranges)
| Repair tier | Dealer price | Specialist price | What it involves | Longevity / suitability |
|---|---|---|---|---|
| Minor - Head Gasket Replacement Only | £1,800 - £2,800 | £1,200 - £1,900 | Remove cylinder heads, replace gaskets with upgraded MLS units, reseal | Viable only if block/heads undamaged; 30-50k mile expectation |
| Full Replacement - Rebuilt / Reconditioned Engine | £3,500 - £5,200 | £895 - £3,200 + fitting | Supply & fit complete rebuilt EJ25 engine with MLS gaskets, bench-tested, warranty included | Long-term solution; 12-month unlimited warranty, addresses root cause |
Our recommendation
On a Subaru Baja worth £3,000-£8,000, a full rebuilt engine often represents better value than a head gasket-only repair, especially if mileage exceeds 100k. We recommend rebuilt units with upgraded MLS gaskets to prevent repeat failure.
Compare rebuilt EJ25 engine prices for your Subaru BajaReplacement Engine Options
Subaru Baja Engine TypesOptions, Costs & What to Expect
Every Subaru Baja engine type is available through our UK network, with typical price ranges based on variant, EJ engine code and budget.
Subaru Baja Reconditioned Engines (Recon)£895 - £3,200((supply only))
Subaru Baja Rebuilt Engines£895 - £3,200((supply only))
Subaru Baja Used Engines£795 - £2,400((supply only))
Subaru Baja Remanufactured Engines£1,200 - £3,500((supply only))
Subaru Baja Refurbished Engines£950 - £2,800((supply only))
Compare Subaru Baja engine prices with vetted UK suppliers
All engine types include a minimum 12-month unlimited mileage warranty when sourced through EngineMarket. Prices are typical UK market ranges based on historical quote data from our network and depend on exact engine code, variant, mileage and supplier. Use our free comparison tool above - enter your registration to get tailored quotes for your specific Subaru Baja within hours.
Engine Sizes
Subaru Baja Engines by SizeFind the Right Displacement for Your Variant
Every displacement fitted to the Subaru Baja in the UK is listed below, with compatible engine codes, production years and common failure notes to help you identify the right replacement.
The 2.5-litre EJ25 boxer family powered every Subaru Baja sold in the UK grey import market, from economical naturally aspirated Base models to the performance-focused Turbo Limited. This SOHC flat-four design offers smooth power delivery and AWD compatibility, though head gasket vigilance is essential for long-term reliability.
⚙
Engine Code(s)
EJ251, EJ252, EJ255
▣
Compatible Models (UK)
Base (2002-2006), Sport (2003-2006), Turbo (2005-2006), Turbo Limited
ϟ
Power output
Verified by registration
△
Common Failure Points
Head gasket degradation on all EJ25 codes; turbo wear on EJ255 units; oil consumption on high-mileage examples
Production Years: 2005-2006
Compare Subaru Baja 2.5L petrol engine pricesFuel Type
Subaru Baja Engines by Fuel Type
Choose your Subaru Baja engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from economical naturally aspirated EJ251 to performance turbo EJ255.
Subaru Baja Petrol Engines
PetrolEvery Subaru Baja sold in the UK grey import market used a 2.5L petrol boxer engine, with naturally aspirated EJ251/EJ252 units for Base/Sport trims and turbocharged EJ255 for performance variants.
Common Subaru Baja Petrol Engine Families
- •EJ251 - Base model naturally aspirated boxer, most common grey import replacement engine
- •EJ252 - Sport trim SOHC boxer, minor refinements over EJ251 for improved reliability
- •EJ255 - Turbocharged performance boxer, high-demand for enthusiast and off-road Baja owners
Found In
- •First Generation (2002-2004) - EJ251/EJ252 naturally aspirated
- •Facelift Generation (2005-2006) - EJ252/EJ255, turbo introduction
Known For
- •Reliable SOHC boxer design when head gaskets are maintained
- •EJ255 turbo delivers strong performance but requires vigilant servicing
- •Compatibility with Legacy/Outback EJ25 donor engines simplifies sourcing
Typical Petrol Models
- •Base
- •Sport
- •Turbo
Subaru Baja Petrol Engines
PetrolEvery Subaru Baja sold in the UK grey import market used a 2.5L petrol boxer engine, with naturally aspirated EJ251/EJ252 units for Base/Sport trims and turbocharged EJ255 for performance variants.
Common Subaru Baja Petrol Engine Families
- •EJ251 - Base model naturally aspirated boxer, most common grey import replacement engine
- •EJ252 - Sport trim SOHC boxer, minor refinements over EJ251 for improved reliability
- •EJ255 - Turbocharged performance boxer, high-demand for enthusiast and off-road Baja owners
Found In
- •First Generation (2002-2004) - EJ251/EJ252 naturally aspirated
- •Facelift Generation (2005-2006) - EJ252/EJ255, turbo introduction
Known For
- •Reliable SOHC boxer design when head gaskets are maintained
- •EJ255 turbo delivers strong performance but requires vigilant servicing
- •Compatibility with Legacy/Outback EJ25 donor engines simplifies sourcing
Typical Petrol Models
- •Base
- •Sport
- •Turbo
Not sure which fuel type your Subaru Baja has- Enter your registration number above to instantly identify your engine code, fuel system and compatible replacement options - all backed by a minimum 12-month unlimited mileage warranty from UK Subaru Baja specialists.
Engine YearsGet quotes for 2002-2004 Subaru Baja replacement engines →
Subaru Baja Engines by YearWhat Was Fitted & WhenSubaru Baja Engines by Year - What Was Fitted & When
This timeline covers all major engine changes across the Subaru Baja's 2002-2006 production run, organised so UK grey import owners can quickly identify their EJ25 engine code and compare rebuilt replacement prices.
⚙Key Changes
- ✓Subaru Baja launched for US market; UK availability via grey import specialists
- ✓EJ251 2.5L SOHC naturally aspirated boxer fitted to Base trim
- ✓Sport trim introduced mid-cycle with minor EJ252 refinements
- ✓AWD standard across all variants, boxer engine layout confirmed
▣Main Engines
EJ251- 2.5L petrol naturally aspirated (Base)
EJ252- 2.5L petrol naturally aspirated (Sport, late Base)
▰Popular Models
- •Subaru Baja Base
- •Subaru Baja Sport
🔧Known For
- ✓Economical naturally aspirated boxer performance for UK grey import buyers
- ✓Head gasket vigilance essential from 80k miles onwards
- ✓Strong compatibility with Legacy/Outback EJ25 donor engines for replacements
Engine Codes Covered:
EJ251EJ252Not sure which year your Subaru Baja was built- Enter your registration number and we'll identify the exact engine, model year, and compatible replacement options instantly - all backed by a minimum 12-month warranty from UK Subaru Baja specialists.
FAQ