Mitsubishi i 3B20 Turbo Engines
from £585 to £702
Rebuilt units from £585 · Common codes: 3B20, 3B20T, 3B20M
Get quotes from trusted UK Mitsubishi L400 engine specialists. Compare reconditioned, rebuilt and used prices for 2.5L to 2.8L diesel - 4D56 & 4M40 covered. Compare supply & fit options today.
Mitsubishi i 3B20 Turbo Engines
from £585 to £702
Rebuilt units from £585 · Common codes: 3B20, 3B20T, 3B20M
Mitsubishi i 3A20 Naturally Aspirated Engines
from £550 to £675
Rebuilt units from £550 · Common codes: 3A20, 3A20NA
Mitsubishi i Rear-Mounted Engine Specialists
from £585 to £702
Rebuilt units from £585 · Common codes: 3B20, 3A20, 3B20MIVEC

Most replacements completed within 3-5 days.
The table below shows typical UK rebuilt engine costs across Mitsubishi i variants - compare failure causes, engine codes, fuel types, and price ranges to benchmark what UK drivers are paying.


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Not sure which variant your Mitsubishi i is- Enter your registration number above - we'll identify the exact sub-model, engine code and compatible replacement options instantly.

Every engine code fitted to the Mitsubishi i 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.
Extracted from detailed petrol and performance engine families across Mitsubishi i variants.

3A20 - 0.66L Petrol
Main replacement demand comes from timing-chain, cooling-system and performance thermal-management faults.
Compatible variants
Avg. rebuilt price
£550 - £675
Supply only
Technical specifications
Common failures
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 Mitsubishi i engine specialists. Every rebuilt engine comes with a minimum 12-month unlimited mileage warranty.

The Mitsubishi i's compact 660cc 3-cylinder engines are generally robust, but the rear-mounted layout creates unique cooling challenges and the 3B20 turbo's interference design makes timing belt maintenance critical. Every rebuilt engine supplied through EngineMarket includes upgraded internal components designed to address original failure points - plus a...
Timing Belt Failure
Most affected vehicles
Mitsubishi i 660cc Turbo, Turbo MIVEC, Turbo 4WD (2006-2013, 3B20 & 3B20M)
Failure mileage range
60,000-90,000 miles if not replaced preventatively
Typical failure window
Root cause
The 3B20 is an interference engine; if the timing belt snaps or jumps teeth, valves contact pistons causing catastrophic internal damage requiring full replacement.
Repair options & estimated costs (UK ranges)
| Repair tier | Dealer price | Specialist price | What it involves | Longevity / suitability |
|---|---|---|---|---|
| Preventative Belt Replacement - Before failure occurs | £450 - £650 | £280 - £420 | Replace timing belt, tensioner, idler pulleys and water pump | Restores reliability; recommended every 60k miles or 5 years |
| Catastrophic Failure Repair - After belt snaps | £2,200 - £3,500 | £1,400 - £2,100 | Cylinder head repair, valve replacement, piston inspection, belt system rebuild | Only viable if damage is minor; often not cost-effective |
| Full Replacement - Rebuilt Engine - Post-failure solution | £1,800 - £2,400 | £950 - £1,350 | Supply & fit reconditioned 3B20 with upgraded components, bench tested, 12-month warranty | Most reliable long-term solution; avoids hidden damage risks |
Our recommendation
On a Mitsubishi i worth £2,500-£4,500, preventative timing belt replacement at 60k miles is far more economical than risking catastrophic failure. If the belt has already snapped, a rebuilt engine with warranty offers better value than attempting a partial repair.
Compare rebuilt 3B20 engine prices for your Mitsubishi i
Every Mitsubishi i engine type is available through our UK network with typical price ranges based on variant, engine code and budget.
Compare Mitsubishi i 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 Mitsubishi i within hours.

Every displacement fitted to the Mitsubishi i is listed below, with compatible engine codes, years and common failure notes to help you identify the right replacement.
The Mitsubishi i exclusively uses a 0.66-litre three-cylinder petrol engine, complying with Japanese kei car regulations. This compact displacement delivers efficient urban mobility with either naturally aspirated or turbocharged configurations, all mounted uniquely under the boot floor.
Engine Code(s)
3A20, 3B20, 3B20M
Compatible Models (UK)
All Mitsubishi i variants (2006-2013), including Base, Turbo, MIVEC, 2WD and 4WD
Power output
Verified by registration
Common Failure Points
Timing belt failure on turbo models, oil seepage at spark plugs on NA units, cooling system challenges due to rear-engine layout
Production Years: Check by registration
Compare Mitsubishi i 0.66L petrol engine prices
Choose your Mitsubishi i engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from early 660cc base to the latest MIVEC Turbo.
The Mitsubishi i exclusively uses 0.66L three-cylinder petrol engines, either naturally aspirated (3A20) or turbocharged MIVEC (3B20/3B20M), all complying with Japanese kei car regulations.
Common Mitsubishi i Petrol Engine Families
Found In
Known For
Typical Petrol Models
The Mitsubishi i exclusively uses 0.66L three-cylinder petrol engines, either naturally aspirated (3A20) or turbocharged MIVEC (3B20/3B20M), all complying with Japanese kei car regulations.
Common Mitsubishi i Petrol Engine Families
Found In
Known For
Typical Petrol Models
Not sure which fuel type your Mitsubishi i 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 Mitsubishi i specialists.

This section covers all major engine changes across the Mitsubishi i's 2006-2013 production timeline, organised so owners can quickly identify their engine and compare rebuilt engine prices from UK specialists.
⚙Key Changes
▣Main Engines
3A20- 0.66L petrol NA (Base, Base 4WD)
3B20- 0.66L petrol turbo (Turbo, Turbo 4WD)
▰Popular Models
🔧Known For
Engine Codes Covered:
3A203B20