Mitsubishi L400 Engine ReplacementReconditioned & Used Prices Compared

A rebuilt Mitsubishi i engine typically costs £550-£720 supply-only, with supply & fit adding £350-£550 labour depending on specialist location and rear-engine access complexity.

• Rebuilt 3A20 naturally aspirated engines range £550-£675
• Rebuilt 3B20 turbo engines range £585-£720 due to turbo components
• Supply & fit labour adds £350-£550 for rear-engine specialist work
• All EngineMarket suppliers include minimum 12-month unlimited mileage warranty

The 3A20 is naturally aspirated (54hp) while the 3B20 is turbocharged MIVEC (64hp); they are not interchangeable without significant modification due to different mounting and ECU requirements.

• 3A20: 54hp, no turbo, simpler maintenance, prone to spark plug well oil seepage
• 3B20: 64hp, turbo MIVEC, performance focus, timing belt critical (interference engine)
• Engine codes must match exactly when replacing; 3A20 cannot substitute for 3B20
• Turbo models command higher replacement prices due to forced induction components

If your Mitsubishi i is otherwise in good condition with low mileage, a rebuilt engine at £550-£720 plus fitting is often more economical than purchasing another kei car in today's market.

• Rebuilt engine cost is typically 30-50% of a comparable used Mitsubishi i purchase price
• Kei car values have risen; replacement often extends life of a known, maintained vehicle
• Factor in rear-engine specialist labour when budgeting for total replacement cost
• EngineMarket warranty protects your investment for 12 months minimum

Due to the unique rear-engine, boot-floor mounting, expect 1-2 days for specialist removal and refitting, longer if cooling system or ancillary components require attention.

• Rear-engine access requires boot floor removal and specialist equipment
• Typical labour time: 8-16 hours depending on variant and condition
• Allow extra time for cooling system flush and ECU relearn procedures
• Book with a garage experienced in kei car or rear-engine layouts

Timing belt failure on turbo 3B20 engines and oil seepage at spark plug wells on 3A20 units are the most frequent failure patterns driving replacement enquiries.

• 3B20: Timing belt snapped = catastrophic valve/piston contact (interference design)
• 3A20: Valve cover gasket degradation allows oil into spark plug wells causing misfires
• Cooling system failures affect both codes due to rear-engine heat concentration
• Regular maintenance at 5,000-mile intervals significantly extends engine life

Due to the rear-engine, boot-floor mounting and kei-car specific torque specifications, DIY fitting is not recommended unless you have specialist equipment and rear-engine experience.

• Boot floor removal requires specific tools and procedures to avoid damage
• Rear-engine cooling routing and ECU connections need precise reconnection
• Incorrect torque on rear engine mounts can cause vibration or premature failure
• Supply & fit from a specialist often proves more economical than DIY errors

Yes, every rebuilt Mitsubishi i engine supplied through EngineMarket includes a minimum 12-month unlimited mileage warranty from UK specialists.

• Warranty covers parts and labour for manufacturing defects in rebuilt components
• Must be fitted by an approved specialist to maintain warranty validity
• Keep all service records and compression test reports for warranty claims
• Some suppliers offer extended warranty options at additional cost

Check your V5C registration document, the engine bay identification plate, or use EngineMarket's DVLA-linked registration lookup to instantly verify your exact 3A20 or 3B20 code.

• Engine code stamped on block near gearbox interface (visible with boot floor removed)
• V5C document section V.5 may list engine code for later registrations
• DVLA lookup via registration number provides instant variant and engine confirmation
• Never guess engine code; 3A20 and 3B20 are not directly interchangeable

With timely timing belt changes on turbo models and attention to cooling system maintenance, both 3A20 and 3B20 engines can reliably exceed 100,000 miles in UK conditions.

• 3A20 naturally aspirated units are mechanically simple and robust if oil leaks addressed
• 3B20 turbo requires strict 60k-mile timing belt changes to avoid catastrophic failure
• Rear-engine layout demands vigilant cooling system inspection and fluid changes
• Regular 5,000-mile oil changes critical due to high-revving kei engine design

EngineMarket's network includes UK specialists experienced with rear-engine kei cars; enter your registration to compare quotes from vetted Mitsubishi i engine fitters nationwide.

• Not all garages have experience with rear-engine, boot-floor mounted layouts
• Specialists understand kei-car specific torque specs and cooling routing
• EngineMarket vets all suppliers for Mitsubishi i expertise and warranty compliance
• Nationwide delivery of engines plus local fitting options available