Mark X 3.5L V6 Engines
from £2,500 to £4,000
Rebuilt units from £2,500 · Common codes: 2GR-FSE, 3GR-FSE
Toyota ENGINE MARKETPLACE
Toyota Mark X Engine Replacement - Compare Quotes from UK Specialists
Get quotes from trusted UK Toyota Mark X engine specialists. Compare reconditioned and rebuilt prices for 2GR-FSE and 4GR-FSE - 2.5L to 3.0L V6 covered. Get specialist quotes for your Mark X.
Supply & Fit Available
12-Month Warranty
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100+ Suppliers
Mark X 2.5L V6 Engines
from £1,500 to £2,500
Rebuilt units from £1,500 · Common codes: 4GR-FSE, 3GR-FSE
Mark X 4.0L V6 Engines
from £3,000 to £5,500
Rebuilt units from £3,000 · Common codes: 1GR-FE
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 Toyota Mark X Replacement Engineto Finding the Best Toyota Mark X 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
What Are UK Drivers Paying for Toyota Mark X Engine Replacement
The table below shows typical UK rebuilt engine costs across Toyota Mark X variants - compare failure causes, engine codes, fuel types, and price ranges to benchmark what UK drivers are paying.
Average Market Prices
↻ Last updated: 4 Aug 26, 9:26
Customer Reviews
Trusted by Toyota Mark X Owners Across the UK
Rated 4.8 out of 5 by 1,081 verified customers who sourced reconditioned and used Toyota Mark X engines through EngineMarket.
4.8
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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.”
PPeteFacebook
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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
Toyota Mark X Engine ReplacementAll Variants Covered
Toyota Mark X 250G
4GR-FSE 2.5L Petrol
Rebuilt Engines: £1,500-£2,500
Toyota Mark X 300G
3GR-FSE 3.0L Petrol
Rebuilt Engines: £1,800-£3,000
Toyota Mark X 350S
2GR-FSE 3.5L Petrol
Rebuilt Engines: £2,500-£4,000
Toyota Mark X Premium
4GR-FSE/2GR-FSE 3.5L Petrol
Rebuilt Engines: £1,600-£4,000
Toyota Mark X GRMN
2GR-FSE 3.5L Petrol
Rebuilt Engines: £4,000-£7,000
Toyota Mark X 250G FOUR
4GR-FSE 2.5L Petrol
Rebuilt Engines: £1,800-£3,000
Toyota Mark X Royal Saloon
3GR-FSE 3.0L Petrol
Rebuilt Engines: £1,700-£2,800
Toyota Mark X S Package
4GR-FSE 2.5L Petrol
Rebuilt Engines: £1,500-£2,500
Toyota Mark X G Package
2GR-FSE 3.5L Petrol
Rebuilt Engines: £2,500-£4,000
Toyota Mark X L Package
4GR-FSE 2.5L Petrol
Rebuilt Engines: £1,500-£2,500
Toyota Mark X Aero Package
2GR-FSE 3.5L Petrol
Rebuilt Engines: £2,600-£4,200
Toyota Mark X Final Edition
4GR-FSE/2GR-FSE 3.5L Petrol
Rebuilt Engines: £1,800-£4,500
Not sure which variant your Toyota Mark X is- Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.
Mark X
Engine Codes
Toyota Mark X Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the Toyota Mark X 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 Toyota Mark X variants.
4GR-FSE - 2.5L Petrol
Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
Compatible variants
250G250G S Package250G L Package250G FOURPremiumFinal Edition
Avg. rebuilt price
£1,500 - £2,500
Supply only
Technical specifications
- Fuel type
- Petrol
- Engine size
- 2.5L
- Power output
- 203-215 hp
- Years fitted
- 2004-2019
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 Toyota Mark X engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.
Mark X
Common Problems
Toyota Mark X Engine Problems - What It Costs to Fix & When Replacement Makes Sense
The Toyota Mark X's GR-series V6 engines are refined but not immune to age-related issues. Carbon buildup on 4GR-FSE/2GR-FSE direct injection units and fuel pressure sensor failures dominate UK replacement enquiries. Every rebuilt engine supplied through EngineMarket includes upgraded internal components designed to address the original failure point - plus...
Carbon Buildup on Intake Valves - Why 4GR-FSE & 2GR-FSE Engines Lose Power
Carbon Buildup on Intake Valves
Most affected vehicles
Toyota Mark X 250G350S
Toyota Mark X 250G, 350S, Premium (2004-2019, 4GR-FSE & 2GR-FSE)
Failure mileage range
100,000-150,000 km (62,000-93,000 miles)
Typical failure window
Root cause
Direct injection (D-4/D-4S) sprays fuel directly into cylinders, bypassing intake valves where oil vapour and PCV gases accumulate as hard carbon deposits, restricting airflow.
Repair options & estimated costs (UK ranges)
| Repair tier | Dealer price | Specialist price | What it involves | Longevity / suitability |
|---|---|---|---|---|
| Minor - Walnut Blasting Clean | £800 - £1,200 | £500 - £800 | Remove intake manifold, blast carbon from valves with walnut media, reassemble | Temporary fix; carbon returns in 20-40k miles if driving style unchanged |
| Intermediate - Injector Service + Clean | £1,200 - £1,800 | £800 - £1,300 | Replace faulty injectors, clean intake, update ECU adaptation values | Better for injectors contributing to carbon; still not permanent |
| Full Replacement - Rebuilt / Reconditioned Engine | £3,500 - £5,500 | £1,500 - £2,500 | Supply & fit rebuilt engine with upgraded components, bench tested, 12-month warranty | Permanent solution; addresses root cause, ideal for high-mileage units |
Our recommendation
For Mark X with under 80,000 miles and mild symptoms, walnut blasting offers good value. For units over 100,000 miles with severe power loss or misfires, replacement is often more cost-effective long-term.
Compare rebuilt 4GR-FSE engine prices for your Toyota Mark XReplacement Engine Options
Toyota Mark X Engine TypesOptions, Costs & What to Expect
Every engine type for your Toyota Mark X is available through our UK network with typical price ranges based on variant, engine code and budget.
Toyota Mark X Reconditioned Engines (Recon)£1,500 - £4,000((supply only))
Toyota Mark X Rebuilt Engines£2,000 - £5,500((supply only))
Toyota Mark X Used Engines£1,200 - £3,500((supply only))
Toyota Mark X Remanufactured Engines£3,000 - £6,500((supply only))
Toyota Mark X Refurbished Engines£1,000 - £2,800((supply only))
Compare Toyota Mark X 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 Toyota Mark X within hours.
Engine Sizes
Toyota Mark X Engines by SizeFind the Right Displacement for Your Variant
Every displacement fitted to the Toyota Mark X is listed below, with compatible engine codes, production years and common failure notes to help you identify the right replacement.
The 2.5L V6 powered the entry-level 250G trim across both Mark X generations, offering refined performance with D-4 direct injection. It remains the most common engine in UK grey imports due to its balance of efficiency and reliability.
⚙
Engine Code(s)
4GR-FSE
▣
Compatible Models (UK)
250G, 250G S Package, 250G L Package, 250G FOUR, Premium
ϟ
Power output
Verified by registration
△
Common Failure Points
Carbon buildup on intake valves, fuel pressure sensor failure, oil consumption on high-mileage units
Production Years: GRX120: 2004-2009; GRX130: 2009-2019
Compare Toyota Mark X 2.5L petrol engine pricesToyota Mark X Engines Fuel Type
Toyota Mark X Engines by Fuel Type
Choose your Toyota Mark X engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from the economical 250G to the high-performance GRMN.
Toyota Mark X Petrol Engines
PetrolAll Toyota Mark X variants were powered by refined GR-series V6 petrol engines, featuring direct or dual injection technology across two generations of grey imports.
Common Toyota Mark X Petrol Engine Families
- •4GR-FSE - 2.5L D-4 direct injection, most common in 250G variants, carbon buildup risk
- •2GR-FSE - 3.5L D-4S dual injection, flagship performance unit, sought after by enthusiasts
- •3GR-FSE - 3.0L D-4, early generation mid-range option, shares architecture with Crown
Found In
- •First Generation GRX120/125 (2004-2009) - 4GR-FSE, 3GR-FSE, early 2GR-FSE
- •Second Generation GRX130/133/135 (2009-2019) - 4GR-FSE, 2GR-FSE, GRMN-tuned 2GR-FSE
Known For
- •Smooth, refined V6 character with strong mid-range torque
- •D-4/D-4S direct injection efficiency but carbon buildup on intake valves
- •Fuel pressure sensor failures causing rough idle or limp mode
Typical Petrol Models
- •250G
- •300G
- •350S
Toyota Mark X Petrol Engines
PetrolAll Toyota Mark X variants were powered by refined GR-series V6 petrol engines, featuring direct or dual injection technology across two generations of grey imports.
Common Toyota Mark X Petrol Engine Families
- •4GR-FSE - 2.5L D-4 direct injection, most common in 250G variants, carbon buildup risk
- •2GR-FSE - 3.5L D-4S dual injection, flagship performance unit, sought after by enthusiasts
- •3GR-FSE - 3.0L D-4, early generation mid-range option, shares architecture with Crown
Found In
- •First Generation GRX120/125 (2004-2009) - 4GR-FSE, 3GR-FSE, early 2GR-FSE
- •Second Generation GRX130/133/135 (2009-2019) - 4GR-FSE, 2GR-FSE, GRMN-tuned 2GR-FSE
Known For
- •Smooth, refined V6 character with strong mid-range torque
- •D-4/D-4S direct injection efficiency but carbon buildup on intake valves
- •Fuel pressure sensor failures causing rough idle or limp mode
Typical Petrol Models
- •250G
- •300G
- •350S
Not sure which fuel type your Toyota Mark X 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 Toyota Mark X specialists.
Engine YearsGet quotes for 2004-2006 Toyota Mark X replacement engines →
Toyota Mark X Engines by YearWhat Was Fitted & WhenToyota Mark X Engines by Year - What Was Fitted & When
This timeline covers all major engine changes across the Toyota Mark X production run, organised so grey import owners can quickly identify their engine and compare rebuilt prices from UK specialists.
⚙Key Changes
- ✓Replaced Toyota Mark II with new GRX120 chassis platform
- ✓Launch with 2.5L 4GR-FSE and 3.0L 3GR-FSE D-4 direct injection engines
- ✓Rear-wheel drive layout with optional FOUR 4WD on 250G
▣Main Engines
4GR-FSE- 2.5L petrol (250G, Premium)
3GR-FSE- 3.0L petrol (300G, Royal Saloon)
▰Popular Models
- •Toyota Mark X 250G
- •Toyota Mark X 300G
- •Toyota Mark X Royal Saloon
🔧Known For
- ✓Smooth, refined V6 character established the Mark X reputation
- ✓Early D-4 injection systems prone to carbon buildup on intake valves
- ✓Fuel pressure sensor failures emerge as common high-mileage issue
- ✓Strong enthusiast interest in UK grey import market from launch
Engine Codes Covered:
4GR-FSE3GR-FSENot sure which year your Toyota Mark X 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 Toyota Mark X specialists.
FAQ