Is it worth replacing the engine in an older R57 Mini Convertible Cooper SD-

It depends on the vehicle's current market value and overall condition. R57 models often value between £4,000 and £10,000. If the car is worth under £6,000, a used engine or major repair may be the only financially viable option, as a full rebuild can approach the vehicle's value.

How long does a Mini Convertible Cooper SD engine replacement take-

A professional supply and fit service for a Mini Convertible Cooper SD typically takes 1 to 3 working days. Sourcing a quality reconditioned or rebuilt engine may take a few days if not immediately available.

What is the difference between the Mini Convertible Cooper D and Cooper SD engines-

While both are diesel variants, the Mini Convertible Cooper SD uses a higher-output 2.0L engine (143hp-190hp) compared to the Cooper D (90hp-116hp). The Cooper SD features a larger turbocharger, upgraded internals, and different ECU mapping to deliver significantly more power and torque.

Mini Convertible Cooper SD Specialists

Mini Convertible Cooper SD Engine Replacement Compare Prices & Get Quotes

Get quotes today from trusted UK Mini Convertible Cooper SD engine specialists. Compare prices on reconditioned, rebuilt and used engines to find the most cost-effective, warranty-backed solution for your vehicle.

Supply & Fit Available

12-Month Warranty

Nationwide Delivery

100+ Suppliers

Mini Convertible Cooper SD Engine

from£3,800 to £5,800

Usedfrom £1,500
Reconditionedfrom £2,800
Common codesN47D20C, B47D20A

Mini convertible Cooper SD Used Engine — N47D20C

Mini convertibleUsed Engine — N47D20C

Mini convertible Cooper SD Reconditioned Engine — N47D20C

Mini convertibleReconditioned Engine — N47D20C

Mini convertible Cooper SD Rebuilt Engine — N47D20C

Mini convertibleRebuilt Engine — N47D20C

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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 Cooper SD Engine History & Specs at a Glance

Launched as the performance diesel variant of the modern Mini Convertible range, the Mini Convertible Cooper SD has evolved from the robust but complex N47 powerplant to BMW’s highly efficient, front-chain B47 architecture, delivering premium open-top driving dynamics with exceptional torque.

2009
N47D20C, 2.0L Turbodiesel, 143hp (R57 generation launch, BMW/PSA joint venture engine)
2016
B47D20A, 2.0L Turbodiesel, 190hp (F57 generation, revised architecture with front-mounted timing chain and improved thermal management)

Every engine fitted to the Mini Convertible Cooper SD is covered below, with UK rebuilt pricing and known failure points to help you make an informed replacement decision.

Engine Codes & Pricing

Mini Convertible Cooper SD Engine Codes Specifications & Replacement Cost

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

N47D20C — 2.0L Turbodiesel (2009-2015)

Power Output: 143hp
Years Fitted: 2009-2015

Can’t find your exact engine code?-> Get quotes for N47D20C Mini Convertible Cooper SD engine replacement

-> Get quotes for N47D20C Mini Convertible Cooper SD engine replacement

Common Problems

Mini Convertible Cooper SD Engine Problems Repair Cost vs Replacement

The reliability of the Mini Convertible Cooper SD depends heavily on its generation. The dominant replacement demand comes from the R57 N47D20C due to timing chain wear, while the F57 B47D20A sees intervention primarily for EGR cooler failures. Rebuilt engines sourced through EnginesMarket include upgraded components addressing these original failure points, backed by a minimum 12-month unlimited-mileage warranty.

Common failure points and repair options

Timing Chain Stretch

Affected: Mini Convertible Cooper SD (N47D20C, 2009-2015)
Typical failure mileage: 60,000-120,000 miles

Root cause

The N47 architecture utilises a rear-mounted timing chain design. This makes the chain and plastic guides difficult to access and highly susceptible to wear if oil service intervals are extended, leading to chain elongation and catastrophic engine failure if the chain skips a tooth.

Repair options

Repair tier	Dealer price	Specialist price
Preventative Chain Kit Replacement	£1,200-£1,800	£650-£1,200
Full Replacement - rebuilt/reconditioned engine	£6,500-£9,000	£4,500-£6,500

Our recommendation

For R57 models showing early timing chain rattle, a preventative chain kit replacement by a specialist is the most cost-effective route, though you must weigh this against the car's overall depreciation. For F57 models, address EGR cooler warnings immediately under the manufacturer recall scheme to prevent secondary engine damage. If catastrophic failure has occurred, a rebuilt engine is the only reliable long-term solution.

EGR Cooler Failure

Affected: Mini Convertible Cooper SD (B47D20A, 2016-present)
Typical failure mileage: 60,000-120,000 miles

Root cause

The EGR cooler can develop internal cracks, allowing coolant to leak into the exhaust manifold. This not only triggers limp mode but poses a severe fire risk, which is why the B47 is significantly more robust in its timing chain design but carries this specific emissions-system weakness.

Repair options

Repair tier	Dealer price	Specialist price
EGR Cooler Replacement & Software Update	£1,000-£1,500	£600-£1,200
Full Replacement - rebuilt/reconditioned engine	£5,500-£8,000	£3,800-£5,800

Our recommendation

-> Compare rebuilt B47D20A Mini Convertible Cooper SD engine prices

Don't Let Engine Failure Write Off Your Mini Convertible Cooper SD

Navigating engine failure is stressful, but you do not have to accept main dealer premiums. By comparing quotes through EnginesMarket, you gain access to vetted UK specialists who supply rebuilt Mini Convertible Cooper SD engines featuring upgraded components that address the original design weaknesses. With a minimum 12-month unlimited-mileage warranty and nationwide supply-and-fit options, you can restore your vehicle's reliability confidently and cost-effectively.

Compare Mini Convertible Cooper SD Engine Replacement Prices Now ->

FAQ

Mini Convertible Cooper SD Engine ReplacementFrequently Asked Questions

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

The cost depends on the engine condition and generation. For the common N47D20C and B47D20A engines, a used unit typically costs £1,500-£3,200 (supply only), while a fully reconditioned or rebuilt engine with a warranty ranges from £3,800 to £6,500 (supply only).

Used engines are cheapest but carry higher risk.
Rebuilt engines include upgraded components and a 12-month warranty.
Supply and fit labour adds approximately £650-£910 depending on the specialist.

-> Compare Mini Convertible Cooper SD engine replacement quotes today.

The most common early warning sign on the N47D20C engine is a distinct rattling or ticking noise from the rear of the engine bay during a cold start, which may fade as the engine warms up.

You may also notice the engine management light illuminating.
A loss of power or rough idling can indicate the chain has stretched significantly.
Warning: Ignoring a rattling timing chain can lead to catastrophic internal engine damage.

-> Get your Mini Convertible Cooper SD engine checked by a specialist immediately.

It depends on the vehicle's current market value and overall condition. R57 models often value between £4,000 and £10,000.

If the car is worth under £6,000, a used engine or major repair may be the only financially viable option, as a full rebuild can approach the vehicle's value.
If the car is in exceptional cosmetic condition or holds sentimental value, a rebuilt engine can extend its life reliably.
For newer F57 models (£12,000+), a rebuilt engine is a sound financial investment.

-> Enter your reg to check your Mini Convertible Cooper SD's exact engine code and value.

A professional supply and fit service for a Mini Convertible Cooper SD typically takes 1 to 3 working days.

Sourcing a quality reconditioned or rebuilt engine may take a few days if not immediately available.
The physical removal and installation process is straightforward for experienced Mini specialists.
Additional time may be required for ECU coding, DPF regeneration, and system resets.

-> Book a supply and fit quote for your Mini Convertible Cooper SD.

While both are diesel variants, the Mini Convertible Cooper SD uses a higher-output 2.0L engine (143hp-190hp) compared to the Cooper D (90hp-116hp).

The Cooper SD features a larger turbocharger, upgraded internals, and different ECU mapping to deliver significantly more power and torque.
Consequently, Cooper SD engine replacements are more complex and carry a higher price tag than standard Cooper D units.

-> Compare prices for your specific Mini Convertible Cooper SD engine code.

Why Choose Us

Compare Mini Convertible Cooper SD Engine Prices Today

Don't overpay at the main dealer. Comparing quotes through EnginesMarket is 100% free and carries no obligation. We connect you directly with vetted UK specialists who understand the unique requirements of the Mini Convertible Cooper SD, ensuring you get the right engine code, transparent pricing, and a warranty you can trust.

500+500+ Mini Convertible Cooper SD engines supplied through our network

12-Month12-Month Warranty on every rebuilt Mini Convertible Cooper SD engine

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