MINI JCW SPECIALISTS

Mini Convertible JCW Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK Mini Convertible JCW engine specialists. Compare prices on reconditioned, rebuilt and used engines to find the most reliable and cost-effective solution for your high-performance vehicle.

Supply & Fit Available

12-Month Warranty

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100+ Suppliers

Mini Convertible JCW Engine

from£2,200 to £4,500...

Usedfrom £1,400
Reconditionedfrom £2,000
Common codesW11B16A, N14B16C, N18B16C

Mini convertible JCW Used Engine — W11B16A

Mini convertibleUsed Engine — W11B16A

Mini convertible JCW Reconditioned Engine — W11B16A

Mini convertibleReconditioned Engine — W11B16A

Mini convertible JCW Rebuilt Engine — W11B16A

Mini convertibleRebuilt Engine — W11B16A

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How it works

3 Simple Steps to Finding the Right Replacement Engine

Clear information first, then the right engine and specialist for your exact vehicle.

Variant History

Mini Convertible JCW Engine History & Specs at a Glance

When the John Cooper Works badge was applied to the Mini Convertible, it transformed the drop-top into a hardcore performance machine. Over its lifecycle, the variant transitioned from a supercharged 1.6-litre unit to BMW's advanced turbocharged four-cylinder architecture, consistently pushing the boundaries of open-top performance.

2006
W11B16A, 1.6L Supercharged, 170hp (R52 generation launch, establishing the JCW drop-top legacy)
2008
N14B16C, 1.6L Turbo, 211hp (R57 generation launch, shifting to twin-scroll turbocharging for massive torque gains)
2011
N18B16C, 1.6L Turbo, 218hp (R57 LCI facelift, featuring revised internals and improved thermal management)
2016
B48A20A, 2.0L Turbo, 231hp (F57 generation launch, expanding displacement for modern performance and reliability)

Every engine fitted to the Mini Convertible JCW is covered below, with UK rebuilt pricing and known failure points.

Engine Codes & Pricing

Mini Convertible JCW Engine Codes Specifications & Replacement Cost

Find your exact engine code, specs and UK replacement cost guide.

W11B16A — 1.6L Supercharged Petrol (2006-2008)

Power Output: 170hp
Years Fitted: 2006-2008

Can’t find your exact engine code?-> Get quotes for W11B16A Mini Convertible JCW engine replacement

-> Get quotes for W11B16A Mini Convertible JCW engine replacement

Common Problems

Mini Convertible JCW Engine Problems Repair Cost vs Replacement

The Mini Convertible JCW delivers exhilarating performance, but its high-strung, high-output engines endure extreme thermal and mechanical stress. Timing chain tensioner failures on the N14/N18 families and HPFP/turbo fatigue on the B48 account for the majority of Mini Convertible JCW replacement requests. Rebuilt engines through EnginesMarket include upgraded components addressing these original failure points, plus a minimum 12-month unlimited-mileage warranty.

Common failure points and repair options

Timing Chain Tensioner Failure

Affected: Mini Convertible JCW (N14B16C, N18B16C, 2008-2015)
Typical failure mileage: 60,000-90,000 miles

Root cause

The rear-mounted timing chain design relies on a hydraulic tensioner that loses pressure during cold starts. Under the high-RPM demands of JCW tuning, the chain stretches rapidly and plastic guides shatter, risking catastrophic valve-to-piston contact.

Repair options

Repair tier	Dealer price	Specialist price
Minor - Preventative Timing Chain Kit	£2,200-£3,400	£1,300-£2,100
Full Replacement - rebuilt/reconditioned engine	£4,200-£5,800	£2,200-£4,200

Our recommendation

JCW engines are not standard units; they are precision-tuned for high output. If your N14/N18 exhibits cold-start rattle, or your B48 shows severe boost loss and oil consumption, piecemeal repairs rarely survive the JCW powertrain's stress long-term. A fully rebuilt Mini Convertible JCW engine with upgraded internals and revised cooling pathways is the only reliable way to preserve the car's performance character.

HPFP & Turbocharger Fatigue

Affected: Mini Convertible JCW (N18B16C, B48A20A, 2011-2024)
Typical failure mileage: 70,000-110,000 miles

Root cause

Direct injection HPFP seals degrade under repeated heat cycles, dropping rail pressure. Concurrently, carbon build-up restricts airflow, forcing the turbo to run hotter and spin faster, accelerating shaft wear and eventual oil seal failure.

Repair options

Repair tier	Dealer price	Specialist price
Intermediate - HPFP & Turbo Replace	£3,200-£4,800	£1,900-£2,900
Full Replacement - rebuilt/reconditioned engine	£4,500-£6,000	£2,200-£4,500

Our recommendation

-> Compare rebuilt B48 and N18 Mini Convertible JCW engine prices

Don't Let Engine Failure Write Off Your Mini Convertible JCW

The Mini Convertible JCW's iconic open-top performance shouldn't end because of a single factory design weakness. Whether you are dealing with timing chain rattle, HPFP failure, or turbo fatigue, EnginesMarket connects you directly with verified UK Mini Convertible JCW specialists who understand these exact high-output failure patterns. Every rebuilt unit we facilitate is upgraded with reinforced internal components to permanently address the root cause, bench-tested for performance, and delivered with a minimum 12-month unlimited mileage warranty.

Compare Mini Convertible JCW Engine Replacement Prices Now ->

FAQ

Mini Convertible JCW Engine ReplacementFrequently Asked Questions

Everything Mini Convertible JCW owners usually ask before choosing a rebuilt, reconditioned or used replacement engine.

Mini Convertible JCW engine replacement costs typically range from £2,000 to £4,500 for a rebuilt unit, depending on the generation and engine code. Rebuilt units offer the best balance of reliability and performance retention for most UK owners.

N18B16C and B48A20A rebuilds average £2,200-£4,500 supply only.
Supply and fit labour adds £500-£1,000 depending on location and specialist calibration requirements.
12-month unlimited mileage warranty included with all EnginesMarket network suppliers.

-> Compare Mini Convertible JCW engine replacement prices from UK specialists now.

Mini Convertible JCW timing chain failure in N14 and N18 engines often presents as a metallic rattling or tapping noise from the rear of the engine bay, particularly during cold starts.

You may also experience a check engine light, misfires, or a sudden loss of power.
Ignoring this noise risks catastrophic valve-to-piston collision due to the high-RPM nature of the JCW tune.
If you hear rattling, have the chain tension inspected immediately by a specialist.

-> Compare Mini Convertible JCW timing chain repair versus full engine replacement costs.

It depends on the vehicle's overall condition and current market value. An R57 Mini Convertible JCW is typically valued between £6,000 and £10,000.

Because JCW models hold strong enthusiast residual value, a specialist rebuild is a highly justifiable investment.
If the chassis, soft-top mechanism, and interior are in excellent condition, replacing the engine preserves the car's premium status.
Always evaluate the full vehicle condition before committing to a high-output rebuild.

-> Check used and reconditioned Mini Convertible JCW engine prices for your exact reg.

No, a standard Mini Convertible engine cannot be directly swapped into a JCW without significant modifications. JCW engines feature specific high-output internals, upgraded turbochargers, and unique ECU mapping.

Standard Cooper engines lack the forged internals and cooling capacity required for JCW performance levels.
Swapping a standard engine would require transferring the entire JCW turbo, fuel, and exhaust systems, which is rarely cost-effective.
It is always more reliable to source a genuine JCW-spec replacement engine (N18B16C or B48A20A).

-> Get quotes for genuine JCW-spec Mini Convertible engine replacement.

A professional supply and fit service for a Mini Convertible JCW typically takes 2 to 4 working days from the time the engine arrives at the specialist workshop.

This includes removing the old unit, fitting the replacement, and performing extensive ECU coding and adaptation.
JCW replacements require specialist diagnostic tools to ensure the turbo and fuel mapping perfectly match the chassis.
Nationwide delivery of the engine can add 1-2 days to the overall timeline.

-> Book your Mini Convertible JCW engine supply and fit today.

Why Choose Us

Compare Mini Convertible JCW Engine Prices Today

Comparing quotes is completely free and carries no obligation. By entering your registration, you ensure that every quote you receive is tailored specifically to your exact Mini Convertible JCW variant and high-output engine code, connecting you directly with vetted UK specialists who understand the unique demands of John Cooper Works performance engineering.

300+300+ Mini Convertible JCW engines supplied through our network

12-Month12-Month Warranty on every rebuilt Mini Convertible JCW engine

NationwideNationwide UK delivery

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Compare quotes from trusted UK Mini Convertible JCW engine specialists with warranty-backed rebuilt, reconditioned and used options nationwide.