01
Mitsubishi Lancer Evolution X
Generation/Chassis
CZ4A
Badge(s)
2.0 Turbo (296 hp) - GSR / SST
Years
2007-2015
Mitsubishi 4B11T Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The Mitsubishi 4B11T is the 2.0-litre turbocharged petrol engine that powered the Lancer Evolution X from 2007 to 2015 - with reconditioned units from approximately £3,500-£5,500, this high-performance engine remains in strong demand among enthusiasts and track-day owners.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£2,000
Reconditioned from
£3,500
Rebuilt from
£5,500
GB
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Quotes only from vetted UK engine specialists.
Key Specs
Mitsubishi 4B11T - Specifications at a Glance
Engine Code
4B11T
Fuel
Petrol
Configuration
2.0L inline-4 turbo, DOHC 16-valve, MIVEC variable valve timing
Power Output(s)
286-440 hp (depending on market and tune; UK: 296-403 hp)
Years Produced
2007-2015
UK Models Fitted
Mitsubishi Lancer Evolution X (all variants) - full list in Compatibility below
2025 UK Replacement Requests
Replaced
[4G63T - LINK PENDING - page not in current inventory]
Replaced By
None (end of Evolution line)
Most Common Failure
Timing chain stretch / Oil consumption
Reconditioned Price Range
£3,500-£5,500 supply-only
Vetted UK specialists for 4B11T replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which Models Use the Mitsubishi 4B11T-
**TAG:** Fitted To
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 Mitsubishi Lancer Evolution X | CZ4A | 2.0 Turbo (296 hp) - GSR / SST | 2007-2015 | |
| Mitsubishi Lancer Evolution X | CZ4A | 2.0 Turbo (335 hp) - FQ-335 (UK) | 2008-2010 | |
| Mitsubishi Lancer Evolution X | CZ4A | 2.0 Turbo (359 hp) - FQ-360 (UK) | 2009-2011 | |
| Mitsubishi Lancer Evolution X | CZ4A | 2.0 Turbo (403 hp) - FQ-400 (UK) | 2012-2015 | |
| Mitsubishi Lancer Evolution X | CZ4A | 2.0 Turbo (283 hp) - US/export spec | 2007-2015 |
02
Mitsubishi Lancer Evolution X
Generation/Chassis
CZ4A
Badge(s)
2.0 Turbo (335 hp) - FQ-335 (UK)
Years
2008-2010
03
Mitsubishi Lancer Evolution X
Generation/Chassis
CZ4A
Badge(s)
2.0 Turbo (359 hp) - FQ-360 (UK)
Years
2009-2011
04
Mitsubishi Lancer Evolution X
Generation/Chassis
CZ4A
Badge(s)
2.0 Turbo (403 hp) - FQ-400 (UK)
Years
2012-2015
05
Mitsubishi Lancer Evolution X
Generation/Chassis
CZ4A
Badge(s)
2.0 Turbo (283 hp) - US/export spec
Years
2007-2015
CROSS-BRAND
4B11T is documented across 5 BMW applications spanning Mitsubishi Lancer Evolution X. Registration lookup confirms the exact suffix before quotes are sent.
Not sure which engine your car has?
Not sure which Evo X variant you have- Enter your registration above - we'll confirm your exact 4B11T fitment before any quotes are sent.
Prices
Mitsubishi 4B11T Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £2,000-£3,500 | £2,580-£4,310 | 3-6 months |
Reconditioned | £3,500-£5,500 | £4,080-£6,310 | 12-24 months |
Rebuilt | £5,500-£8,000 | £6,080-£8,810 | 12-24 months |
All figures . Fitted = supply price + labour band below.
Labour Guide
Fitting a 4B11T typically takes 12-16 hours at £65-£91/hr (independent Evo specialist) - confirm exact labour when comparing quotes.
Price Factors
What moves the price on a 4B11T is the condition of the turbocharger, whether the timing chain has been replaced, and whether the engine has suffered from the common oil consumption issues. A reconditioned unit that includes a new turbo, timing chain, and upgraded pistons rings commands a premium over a used take-out. See our full reconditioned engine cost guide.
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Common Problems
Mitsubishi 4B11T Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the 4B11T, based on real-world data and verified failure patterns.
Verified issue focus: Timing chain stretch / Oil consumption.
1. Timing Chain Stretch - Rattling & Performance Loss
1. Timing Chain Stretch - Rattling & Performance Loss
Typical onset:
50,000-80,000 miles (more common on tuned engines)
What happens:
The 4B11T uses a timing chain that can stretch over time, particularly on high-mileage or heavily tuned examples. The tensioner is also prone to wear. Symptoms include rattling on cold start-up, poor performance, and check-engine lights. If the chain jumps, valves will contact pistons, resulting in catastrophic engine failure.
Repair vs replace:
If caught early (rattling only), timing chain and tensioner replacement is a manageable repair (£800-£1,500). If the chain has jumped, the engine is typically beyond economical repair - a full replacement is the only option. Read our full timing chain failure guide
Read more about this issue
2. Oil Consumption - Piston Ring Wear & PCV Issues
2. Oil Consumption - Piston Ring Wear & PCV Issues
Typical onset:
40,000-80,000 miles (varies with maintenance)
What happens:
The 4B11T is known for oil consumption, particularly on high-mileage examples. This can be due to worn piston rings, valve stem seals, or a faulty PCV valve. Excessive oil consumption can lead to low oil levels, which can cause bearing damage and turbo failure.
Repair vs replace:
If caught early, replacing the PCV valve and using a heavier oil can reduce consumption. Piston ring replacement is a major job (£1,500-£3,000) and is often done as part of a rebuild. If the engine has suffered bearing damage due to low oil, a full replacement is required. Read our full oil consumption guide
Read more about this issue
3. Turbocharger Failure - Wastegate & Bearing Issues
3. Turbocharger Failure - Wastegate & Bearing Issues
Typical onset:
60,000-100,000 miles
What happens:
The 4B11T's TD05HR turbocharger (and variants) can suffer from wastegate actuator failure, bearing wear, and oil seal failure. Symptoms include loss of boost, blue smoke, and a whining noise from the turbo. This is more common on tuned engines running higher boost.
Repair vs replace:
Turbo refurbishment is a specialist job (£500-£1,200). If the turbo has failed catastrophically, it will send debris into the oil system, requiring a full engine strip and replacement.
Read more about this issue
The 4B11T was revised over its production life, with later engines (2012+) benefiting from improved piston rings and a revised timing chain tensioner. However, the core vulnerabilities remain - regular oil changes (5,000 miles) with high-quality fully synthetic oil are essential. The engine is otherwise robust and capable of high mileage with proper maintenance.
Compare rebuilt 4B11T prices with the timing chain and turbo already addressed
Engine Variants
How to Confirm You Have the 4B11T
The 4B11T is the turbocharged version of Mitsubishi's 2.0-litre 4B11 engine, featuring a forged crankshaft, high-strength connecting rods, and a cast aluminium block with closed-deck design for strength. It is the engine of the Lancer Evolution X and was offered in multiple power outputs depending on the market and specification. Where the code appears: - Stamped on a metal plate on the engine block (left-hand side, near the timing cover) - On the V5C logbook under "Engine number" (the first 5 characters will read 4B11T) - Via Mitsubishi VIN decoder - the Evo X is easily identifiable by chassis code CZ4A Commonly confused with: - 4B11 - the naturally aspirated 2.0-litre petrol used in Lancer, Outlander and ASX; no turbocharger, different pistons and compression ratio - [4G63T - LINK PENDING - page not in current inventory] - the 2.0-litre turbo from earlier Evos (I-IX); completely different engine family (iron block), not interchangeable - [4B11T - LINK PENDING - page not in current inventory] - different tunes (FQ-335, FQ-360, FQ-400) are ECU and turbo variations, but the long-block is similar
Not sure which Evo X variant you have- Enter your registration above and we'll confirm your exact engine code before sending any quotes.
Easily Confused
4G63T
LINK PENDING - page not in current inventory] - the legendary 2.0-litre turbocharged engine that powered the Lancer Evolution I-IX. Used an iron block and belt-driven timing system, making it more robust for high-boost applications but heavier and less refined than the 4B11T's aluminium block.
Confirm the exact 4B11T fitment
Not sure which Evo X variant you have- Enter your registration above and we'll confirm your exact engine code before sending any quotes.
Buying Guide
Buying a Replacement 4B11T - 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 4B11T can be a viable option for owners of lower-value Evo Xs, but the engine is often subjected to hard use and tuning. Only consider a used unit with documented proof of recent timing chain replacement, turbo health, and oil consumption history. Without that, factor in £1,500-£3,000 for preventative work (chain, rings, turbo). Link once: /services/used-engines
Reconditioned:
** A proper 4B11T recon is the gold standard for Evo X owners. A quality recon should include: full strip and inspection, new timing chain and tensioner (critical), new piston rings (to address oil consumption), turbocharger refurbishment, new gaskets and seals, and a full test. With a 12-24 month warranty, this gives you peace of mind that the engine's known weaknesses have been addressed - well worth the £3,500-£5,500 supply cost for a performance car. Link once: /services/reconditioned-engines
Rebuilt:
** A full rebuild is justified when the original engine has suffered catastrophic failure (chain jump, bearing failure, turbo disintegration) and the car is a cherished example or track-day project. An upgraded rebuild should include forged pistons, upgraded rods, new bearings, a full cylinder head overhaul, and a upgraded oil pump. This is specialist territory and typically only makes sense for cars with strong residual value or competition use. Link once: /services/rebuilt-engines
Supply & Fit Line:
** All engines can be supplied and fitted through our network of vetted Mitsubishi Evo specialists nationwide, with 12-month warranty on reconditioned and rebuilt units. Link once: /services/supply-and-fit
Vehicle Value Note:
** The 4B11T sits in Lancer Evolution X - cars now worth £10,000-£35,000 depending on condition, mileage, and variant (especially FQ-400). With a reconditioned supply cost of £3,500-£5,500, replacement is viable on most examples. However, for a high-mileage standard GSR worth under £10,000, a used unit (£2,000-£3,500) with documented history may be the only sensible option. Given the Evo X's status as a modern classic, many owners choose to invest in a reconditioned engine to preserve the car's value and performance.
** Compare 4B11T Engine Prices Now --- **Correction applied:** 4B11T is not listed in EM_Proprietary_Data_2025.txt Table A. All pricing . Request volume as not EM-VERIFIED. Failure patterns from specialist and owner sources . Engine lifespan estimated at 100k-150k miles with proper maintenance.
Related Engines
Engines Related to the Mitsubishi 4B11T
Explore engines that are closely related to the Mitsubishi 4B11T, including its predecessor, successor, and key family variants.
Predecessor
4G63T
LINK PENDING - page not in current inventory] - the legendary 2.0-litre turbocharged engine that powered the Lancer Evolution I-IX. Used an iron block and belt-driven timing system, making it more robust for high-boost applications but heavier and less refined than the 4B11T's aluminium block.
Successor
None
the 4B11T was the final Evolution engine. Mitsubishi discontinued the Lancer Evolution line in 2015, making the 4B11T the last of the Evo engines. There is no direct successor.
FAQ
Mitsubishi 4B11TFrequently Asked Questions
Question 1How much does a Mitsubishi 4B11T engine replacement cost-
A reconditioned 4B11T supply-only costs approximately £3,500-£5,500, with fitted prices ranging from £4,080 to £6,310 depending on labour rates. Used units start at £2,000-£3,500, and full rebuilds run from £5,500-£8,000. Prices are supply-only; fitting adds 12-16 hours at independent Evo specialist rates. Warranty varies: 3-6 months on used, 12-24 months on reconditioned and rebuilt.
- Prices are supply-only; fitting adds 12-16 hours at independent Evo specialist rates.
- Warranty varies: 3-6 months on used, 12-24 months on reconditioned and rebuilt.
Question 2What are the most common failures on the 4B11T Evo X engine-
The most documented issues are timing chain stretch (causing rattling on start-up and potential chain jump), oil consumption (due to piston ring wear or PCV issues), and turbocharger failure (wastegate actuator, bearing wear). The engine is otherwise robust; regular servicing and using high-quality fully synthetic oil are essential for longevity. Timing chain: rattling on start-up is the early warning sign. Oil consumption: check oil levels regularly; piston ring replacement may be needed. Turbocharger: wastegate and bearing issues common on tuned engines.
- Timing chain: rattling on start-up is the early warning sign.
- Oil consumption: check oil levels regularly; piston ring replacement may be needed.
- Turbocharger: wastegate and bearing issues common on tuned engines.
Question 3Which Mitsubishi models use the 4B11T engine-
The 4B11T was fitted exclusively to the Mitsubishi Lancer Evolution X (CZ4A chassis) from 2007 to 2015. UK variants include the 296 hp GSR/SST, 335 hp FQ-335, 359 hp FQ-360, and 403 hp FQ-400. US/export spec models produce 283 hp. Not to be confused with the 4B11 naturally aspirated engine. Not to be confused with the 4G63T from earlier Evos.
- Not to be confused with the 4B11 naturally aspirated engine.
- Not to be confused with the 4G63T from earlier Evos.
Question 4Should I buy a used or reconditioned 4B11T engine-
A used 4B11T can be viable for lower-value Evo Xs, but only if it has documented proof of recent timing chain replacement, turbo health, and oil consumption history. Without that, factor in £1,500-£3,000 for preventative work (chain, rings, turbo). A reconditioned engine is the safer choice - it includes new timing chain, piston rings, turbo refurbishment, and gaskets, with a 12-24 month warranty. Used is cheaper (£2,000-£3,500) but timing chain and oil consumption risks are significant. Reconditioned addresses all known weak points and gives peace of mind.
- Used: cheaper (£2,000-£3,500) but timing chain and oil consumption risks are significant.
- Reconditioned: addresses all known weak points and gives peace of mind.
Question 5How do I confirm if my car has the 4B11T or the 4B11-
Check the engine code stamped on the block (left-hand side) - it will read 4B11T for the turbocharged Evo engine, or 4B11 for the naturally aspirated version. The V5C logbook also lists the full engine number, with the first 5 characters identifying the code. 4B11T: 2.0L turbo, 286-440 hp, Evo X only. 4B11: 2.0L naturally aspirated, 154 hp, used in Lancer, Outlander, ASX. Fitting the wrong variant is not a straight swap - different pistons, rods, ECU, turbo and ancillaries.
- 4B11T: 2.0L turbo, 286-440 hp, Evo X only.
- 4B11: 2.0L naturally aspirated, 154 hp, used in Lancer, Outlander, ASX.
- Fitting the wrong variant is not a straight swap - different pistons, rods, ECU, turbo and ancillaries.
Question 6How long does a 4B11T engine typically last-
With meticulous maintenance and early preventative work, these engines can exceed 100,000-150,000 miles. The 4B11T is fundamentally a robust engine; the limiting factors are the timing chain, oil consumption, and turbocharger wear. Timing chain replacement recommended at 60k-80k miles as preventative. Regular oil changes (5,000 miles) with high-quality fully synthetic 5W-30/5W-40 oil are essential. Oil level checks should be performed regularly between services.
- Timing chain replacement recommended at 60k-80k miles as preventative.
- Regular oil changes (5,000 miles) with high-quality fully synthetic 5W-30/5W-40 oil are essential.
- Oil level checks should be performed regularly between services.
Compare Mitsubishi 4B11T Engine Prices Today
Compare free, no-obligation quotes from our network of pre-vetted Mitsubishi Evo specialists. Every quote is specific to your exact 4B11T variant and power output (FQ-335, FQ-360, FQ-400 or standard GSR), and our reg-lookup tool confirms correct fitment before any quote is sent. With reconditioned 4B11T units available from approximately £3,500, comparing takes two minutes and could save you thousands on your Evo X replacement.
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Minimum 12-Month Warranty
Minimum 12-month warranty on reconditioned and rebuilt options
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