Honda N-Box Engine ReplacementCompare Prices & Save

Rebuilt Honda N-Box engines typically cost £1,450-£2,550 depending on variant, with naturally aspirated S07A units at the lower end and hybrid S07B-H at the premium. Prices include supply only; fitting adds £450-£850 through specialist JDM garages.

• S07A NA rebuilt: £1,450-£1,750 average UK supply price
• S07B turbo rebuilt: £1,850-£2,250 including upgraded wastegate
• Hybrid S07B-H units: £2,050-£2,550 due to electrical complexity
• Supply & fit service adds £450-£850 depending on location

S07B offers improved efficiency with direct injection but requires more maintenance; S07A is simpler and cheaper to rebuild. Choose based on your variant's original fitment-swapping generations requires chassis modification.

• S07A (2011-2017) simpler, cheaper parts, proven reliability
• S07B (2017+) more efficient but direct injection needs cleaning
• Engines not directly interchangeable between generations
• Match engine code to your chassis: JF1/JF2 use S07A, JF3/JF4 use S07B

Timing chain rattling on cold start usually indicates hydraulic tensioner wear allowing chain slack. Left unchecked, this can cause timing jump and catastrophic engine damage on S07A/S07B units.

• Tensioner loses hydraulic pressure after 60k-90k miles typical
• Rattle on cold start is the earliest warning symptom
• Chain stretch can follow if tensioner not replaced promptly
• Rebuilt engines include upgraded tensioner to prevent recurrence

Technically possible but not recommended without extensive modification. Turbo S07 variants require different ECU mapping, cooling, exhaust and fuel system components not present on NA chassis.

• Turbo engines need upgraded intercooler, exhaust and fuel delivery
• ECU must be reprogrammed or replaced for turbo management
• Chassis wiring harness differs between NA and turbo variants
• Cost of conversion often exceeds value of a standard N-Box

Well-maintained S07A/S07B engines can reach 120,000-150,000 miles, but kei car stress and import history mean many UK examples need replacement between 80,000-100,000 miles.

• Regular oil changes critical for turbo bearing longevity
• Timing chain tensioner should be inspected at 60k miles
• Direct injection S07B benefits from fuel system cleaning every 40k miles
• Import history and Japanese road conditions affect actual lifespan

Yes, if the engine number changes you must update your V5C logbook with DVLA. For grey imports, ensure the replacement engine matches the original specification to avoid IVA or MOT complications.

• DVLA requires notification of engine number change on V5C
• Keep documentation proving replacement engine matches original spec
• Same engine code (S07A/S07B) avoids emissions or IVA retest issues
• Specialist JDM garages can assist with DVLA paperwork for imports

Reconditioned engines replace worn parts to restore function; rebuilt engines include upgraded components addressing known failure points like tensioners or wastegates, offering better long-term reliability.

• Reconditioned: worn parts replaced, tested to OEM spec
• Rebuilt: upgraded internals targeting known S07 failure patterns
• Rebuilt typically costs £200-£400 more but offers longer lifespan
• Both include 12-month warranty when sourced through EngineMarket

Yes, CVT judder, shudder or slipping is often misdiagnosed as engine knock. Always have transmission fluid and valve body checked before concluding the engine needs replacement.

• CVT judder feels like engine vibration but originates in transmission
• Low or degraded HCF-2 fluid is the most common CVT issue cause
• Valve body solenoid failure can mimic engine misfire symptoms
• Specialist diagnosis prevents unnecessary engine replacement costs

Low-mileage JDM imports can be reliable if compression-tested and inspected, but verify service history and ensure the engine matches your chassis code and drivetrain configuration before purchase.

• Request compression test results and leak-down report before buying
• Confirm engine code (S07A/S07B) matches your vehicle's original fitment
• Check for 4WD-specific components if your N-Box has Real Time 4WD
• Factor in shipping, import duty and specialist fitting costs to total price

For N-Box values of £5,000-£12,000, a rebuilt engine at £1,450-£2,550 often makes financial sense versus scrapping, especially with 12-month warranty and specialist fitting included.

• Compare replacement cost against current market value of your variant
• Rebuilt engines with warranty offer better value than used units without
• Factor in specialist fitting costs essential for JDM kei car expertise
• Consider long-term ownership plans when deciding repair vs replace