Mitsubishi Outlander 2.4 4B12 MIVEC Engine ReplacementCompare Prices & Get Quotes
Looking for a Mitsubishi Outlander 2.4 MIVEC engine replacement- Get quotes from trusted UK Outlander 2.4 4B12 engine specialists today. Compare prices on reconditioned, rebuilt and used engines for your Mitsubishi Outlander 2.4 MIVEC - supply & fit available.
Supply & Fit Available
12-Month Warranty
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From £1,500 to £3,500
Used from £400 · Reconditioned from £1,200 · Common codes: 4B12
From £400
Tested, bare/short engine
From £1,200
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
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3 Simple Steps3 Simple Stepsto Finding the Best Mitsubishi Outlander 2.4 4B12 MIVEC Replacement Engineto Finding the Best Mitsubishi Outlander 2.4 4B12 MIVEC Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryMitsubishi Outlander 2.4 MIVEC - Engine History & Specs at a Glance
The Mitsubishi Outlander 2.4 MIVEC, powered by the 4B12 engine, has been the core petrol offering across multiple Outlander generations. It is a naturally aspirated 2.4-litre four-cylinder from the Global Engine Alliance, used extensively in UK-market Outlanders from the second generation onward as a reliable, family-friendly SUV powertrain.
Variant HistoryMitsubishi Outlander 2.4 MIVEC - Engine History & Specs at a Glance
The Mitsubishi Outlander 2.4 MIVEC, powered by the 4B12 engine, has been the core petrol offering across multiple Outlander generations. It is a naturally aspirated 2.4-litre four-cylinder from the Global Engine Alliance, used extensively in UK-market Outlanders from the second generation onward as a reliable, family-friendly SUV powertrain.
Mitsubishi Outlander 2.4 MIVEC
Fuel TypePetrol
Engine Size Range2.4L (2359 cc) - consistent across all generations
Power Output Range133-170 hp across the variant's historyEngine History Timeline
4B12 MIVEC 2.4-litre petrol engine introduced in the second-generation Outlander (ZG/ZH) producing 170 hp and 226 Nm of torque, paired with a CVT or 4WD system .
Third-generation Outlander (ZK/ZL) adopts the same 4B12 engine now rated at 167 hp with minor emissions and economy refinements; the engine remains the primary petrol option alongside the 2.2 DI-D diesel and later the PHEV .
Facelift for the third-generation Outlander with 4B12 continuing in petrol models; subtle tuning adjustments maintain power output around 167 hp .
Fourth-generation Outlander introduces a revised 2.4-litre MIVEC engine still designated 4B12, now used primarily in the PHEV hybrid system producing 133 hp (combined system output significantly higher) .
Key Specs Snapshot
Fuel TypePetrolEngine Size Range2.4L (2359 cc) - consistent across all generationsPower Output Range133-170 hp across the variant's historyYears Produced2007-presentEvery engine fitted to the Mitsubishi Outlander 2.4 MIVEC is covered below, with UK rebuilt pricing and known failure points - including the 4B12 petrol, 4N14 diesel, and PHEV hybrid powertrain for Outlander 2.4 models.
Mitsubishi Outlander 2.4 MIVEC Engine Codes - Specifications & Replacement CostMitsubishi Outlander 2.4 MIVEC Engine Codes - Specifications & Replacement Cost
2.4L Petrol MIVEC (2007-present)
Power Output167-170 hpYears Fitted2007-present
Compatible Trim Levels
- Outlander 2.4 MIVEC
- Outlander 2.4 LS
- Outlander 2.4 GX
- Outlander 2.4 Juro
- Outlander 2.4 4WD
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£400-£900
Reconditioned
Addressed known issues, tested
£1,200-£2,200
Rebuilt
Full teardown, upgraded internals
£1,800-£3,500
Common Failure
Timing chain stretch and tensioner wear have been reported on the 4B12, particularly with irregular oil changes. The 4B12 uses a timing chain designed for the engine's life, but tensioner failure can cause cold-start rattle and, if ignored, chain jump - potentially catastrophic for the valvetrain . Also known for occasional oil consumption and sticky piston rings .
The 4B12 MIVEC engine is generally a reliable, well-engineered unit - one of the better petrol engines in the Mitsubishi Outlander 2.4 MIVEC range. Most 4B12 engines cover high mileages without significant problems, provided they are serviced with the correct oil grade and interval. When failures do occur, they tend to be predictable rather than catastrophic. Rebuilt engines through EnginesMarket include upgraded components (such as improved timing chain tensioners and piston rings) addressing the original weak points, plus a minimum 12-month unlimited-mileage warranty.
Why the Mitsubishi Outlander 2.4 MIVEC 4B12 Can Rattle on Start-Up
Affected Vehicles
Mitsubishi Outlander 2.4 MIVEC (4B12, all years)
Typical Failure Mileage
80,000-150,000 miles
Root Cause
Timing chain tensioner wear leads to insufficient hydraulic pressure on cold start, allowing chain slack and a characteristic rattle for 1-3 seconds. The 4B12 uses a timing chain designed to last the engine's life, but tensioner deterioration can cause chain jump and valve/piston contact - catastrophic if ignored .
Why It Happens
Timing chain tensioner wear leads to insufficient hydraulic pressure on cold start, allowing chain slack and a characteristic rattle for 1-3 seconds. The 4B12 uses a timing chain designed to last the engine's life, but tensioner deterioration can cause chain jump and valve/piston contact - catastrophic if ignored .
Dealer (parts + labour)
£500-£800
Specialist (parts + labour)
£300-£500
What it involves
Replacement of chain tensioner and guides only; oil change with correct grade
Suitability
Best for early warning rattle only; not for stretched chains
1 - 2 daysDealer (parts + labour)
£900-£1,500
Specialist (parts + labour)
£600-£1,000
What it involves
Replacement of chain, tensioner, guides, sprockets; full front-end access
Suitability
Recommended if rattle persists or at chain service interval (if documented)
1 - 2 daysDealer (parts + labour)
£2,500-£4,500
Specialist (parts + labour)
£1,800-£3,500 (should match Section 4's rebuilt figure for 4B12)
What it involves
Supply & fit rebuilt engine, upgraded components addressing the original failure point, 12-month warranty
Suitability
When timing chain has jumped and caused internal damage
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 |
|---|---|---|---|---|---|
 Tensioner replacement (preventative) Minor | £500-£800 | £300-£500 | Replacement of chain tensioner and guides only; oil change with correct grade | Best for early warning rattle only; not for stretched chains | 1 - 2 days |
 Full chain kit replacement Best Value | £900-£1,500 | £600-£1,000 | Replacement of chain, tensioner, guides, sprockets; full front-end access | Recommended if rattle persists or at chain service interval (if documented) | 1 - 2 days |
Full engine rebuild/replacement Best Value | £2,500-£4,500 | £1,800-£3,500 (should match Section 4's rebuilt figure for 4B12) | Supply & fit rebuilt engine, upgraded components addressing the original failure point, 12-month warranty | When timing chain has jumped and caused internal damage | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
A typical Mitsubishi Outlander 2.4 MIVEC of relevant age (2007-2015) is worth approximately £2,000-£9,000 depending on mileage and condition [THIRD-PARTY, Auto Trader/Parkers market observation]. If your vehicle is worth under £4,000, a full rebuilt engine may be financially borderline - evaluate a used engine or repair-first approach. If worth £4,000-£8,000, reconditioned or rebuilt is viable if you plan to keep the car 2+ years. If worth £8,000+, replacement cost is well within vehicle value and usually the sensible choice.
Our Recommendation
Our Recommendation
The 4B12 is a sound engine, and early intervention - replacing the chain tensioner at the first sign of cold-start rattle - is significantly cheaper than a full chain replacement or rebuild. If the chain has already jumped and bent valves, a rebuilt engine with the warranty is the safer long-term choice over a used engine of unknown history.
Don't Let Engine Failure Write Off Your Mitsubishi Outlander 2.4 MIVEC
The 4B12 engine is generally robust, but when failure does strike - whether timing chain wear, oil consumption, or persistent stalling - the cost of dealer repair can quickly exceed the vehicle's value. EnginesMarket compares specialist quotes for rebuilt, reconditioned and used Outlander 2.4 MIVEC engines with a minimum 12-month warranty, nationwide delivery, and supply & fit options - so you can make an informed decision based on your vehicle's true value and your ownership horizon.
Compare rebuilt 4B12 Mitsubishi Outlander 2.4 MIVEC 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 Mitsubishi Outlander 2.4 MIVEC. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Mitsubishi Outlander 2.4 MIVEC Engine ReplacementFrequently Asked Questions
Question 1How much does a Mitsubishi Outlander 2.4 MIVEC engine replacement cost-
A used Mitsubishi Outlander 2.4 4B12 engine typically costs £400-£900, while a reconditioned unit is around £1,200-£2,200 and a fully rebuilt engine with warranty is £1,800-£3,500 [EM-QUOTE].
- Used: cheapest option, but condition and history are uncertain
- Reconditioned: tested and rebuilt to working standard with warranty
- Rebuilt: fully stripped, inspected, rebuilt with upgraded components, 12-month warranty
Question 2What are the signs of timing chain failure in a Mitsubishi Outlander 2.4 MIVEC-
The most common early sign is a rattle on cold start lasting 1-3 seconds, caused by the chain tensioner losing hydraulic pressure.
- If left unchecked, chain wear can progress to cam/crank correlation faults and eventual chain jump
- Valve/piston contact is catastrophic - requiring a full rebuild or replacement
- The 4B12 uses a timing chain, not a belt - no scheduled replacement interval, but tensioner wear is a known issue
Question 3Is it worth replacing the engine in a Mitsubishi Outlander 2.4 MIVEC-
Whether it's worth it depends on your Outlander's value, mileage, and condition.
- Sub-£4,000 vehicle: used or reconditioned engine may be more sensible than a full rebuild
- £4,000-£8,000 vehicle: reconditioned or rebuilt with warranty is viable if keeping the car 2+ years
- £8,000+: replacement cost is well within vehicle value and usually the right choice
Question 4What's the difference between the 2.4 MIVEC and the 2.2 DI-D Outlander-
The 2.4 MIVEC (4B12) is a naturally aspirated petrol engine, ideal for lower-mileage, urban or family use with simpler maintenance.
- Fuel type: Petrol vs Diesel
- Power: 167-170 hp vs 147-177 hp
- Typical fuel economy: 30-35 mpg (petrol) vs 40-48 mpg (diesel)
- Reliability: 4B12 petrol is generally more reliable than the 4N14 diesel, with fewer EGR/DPF complications
Question 5Can I fit a used Outlander 2.4 MIVEC engine myself-
While some DIY owners do, it is a complex job requiring engine lifting gear, specialist tools, and ECU adaptation.
- A used engine may need ECU reprogramming for immobiliser compatibility
- Timing chain alignment must be precise - misalignment can cause immediate damage
- Many suppliers will only warranty engines fitted by a qualified garage
Question 6How long does a Mitsubishi Outlander 2.4 MIVEC engine last-
With proper maintenance - regular oil changes with the correct grade and good quality fuel - the 4B12 engine can cover 150,000-200,000 miles or more.
- The timing chain tensioner is the main long-term weak point
- Regular oil changes (5,000-8,000 miles) reduce timing chain and piston ring wear
- Correct oil spec and PCV maintenance prevent ring-sticking oil consumption
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4B12 MIVEC engines supplied through our network
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