J
Jimmy
★★★★★
“Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
ENGINEMARKET
Mini ENGINE MARKETPLACE
Mini Roadster Engine ReplacementCompare Prices & Save
Get quotes today from trusted UK Mini Roadster engine specialists. Compare prices on reconditioned, rebuilt and used engines - supply & fit available.
Roadster Petrol Engines - from £1,200 to £3,200
-> Rebuilt units from £1,450 · Common codes: N18B16A, N13B16A, N18B16
Roadster Diesel Engines - from £1,400 to £3,800
-> Rebuilt units from £1,550 · Common codes: N47D20C, N47D20, B47D20
Roadster John Cooper Works Engines - from £2,800 to £7,500
-> Rebuilt units from £3,200 · Common codes: N18B16A, N55B30M0, N18B16
🔒 Secure enquiry - no spam, no pressure. Genuine quotes only from vetted UK Mini Roadster specialists.
● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|
● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|● Instant Quotes · No Obligation · 100% Free · Reconditioned · Rebuilt · Used · Supply & Fit Available · UK-Wide Network|
How It Works
3 Simple Stepsto Finding the Best Mini Roadster Replacement Engine
Get Instant Quotes from Mini Engine Specialists Across the UK - 100% free, no obligation. Most replacements completed within 3-5 days.
Most replacements completed within 3-5 days.
12-Month Warranty
Supply & Fit Available
Nationwide Delivery
Trusted UK Suppliers
Live UK Engine Market Data
What Are UK Drivers Paying for Mini Roadster Engine Replacement?
Compare affordable rebuilt Mini Roadster engine costs by variant - see failure causes, codes, fuel types & sizes to find best value UK replacement options.
Average Market Prices
- Mini Roadster (R59) JCW2012-2015£2,800-£5,800HPFP failureN18B16APetrol 1.6L
- Mini Roadster (R59) Cooper2012-2015£1,200-£2,600Valve stem seal leakN13B16APetrol 1.6L
- Mini Roadster (R59) Cooper S2012-2015£1,400-£3,200Timing chain tensionerN18B16APetrol 1.6L
- Mini Roadster (R59) Cooper S2012-2015£1,400-£3,200Wastegate rattleN18B16APetrol 1.6L
- Mini Roadster (R59) SD2012-2015£1,500-£3,600EGR cooler failureN47D20CDiesel 2.0L
- Mini Roadster (R59) SD2012-2015£1,500-£3,600Timing chain stretchN47D20CDiesel 2.0L
Last updated: 31 May, 08:53
Customer Reviews
Trusted by Mini Roadster OwnersAcross the UK
★★★★★
4.8 out of 5
Rated 4.8 out of 5 by 1,081 verified customers who sourced reconditioned and used Mini Roadster engines through EngineMarket.
P
Pete
★★★★★
“Got three quotes within an hour and chose the best deal easily. The whole process was quick, clear and stress-free.”
S
Sophie
★★★★★
“I wasn't sure what I needed, but they helped me identify the right engine and connected me with a trusted garage.”
Google
★★★★★
“
Thanks to EngineMarket, I saved over £1,200 on my engine replacement and got matched with a great local specialist within the hour.”
- Jimmy, London
Highly Rated Experience - Leave a Review
Leave a review → - Your feedback helps other Mini Roadster owners find trusted engine specialists.
Models We Cover
Mini Roadster Engine ReplacementAll Variants Covered
From the economical Cooper to the high‑performance John Cooper Works, our network of UK Mini Roadster engine specialists lets you compare rebuilt, reconditioned and used engine prices. Typical price range for a rebuilt unit with 12‑month warranty - supply & fit available nationwide.
Core Petrol Range
Specs120hp
Years2012-2015
Rebuilt£1,200-£2,600
Performance & Specialist Range
Variant Directory
All Mini Roadster Variants - Engine Replacement Coverage
A full alphabetical listing of every Mini Roadster trim covered by our network. All entries link to a dedicated variant page, where prices are further broken down by engine code, model year, and condition type. Click a live link to compare quotes.
Diesel Variants
SD
Petrol Variants
CooperCooper S
Performance Variants
John Cooper Works
Engine Codes
Mini Roadster Engine CodesFull Technical Specifications & Replacement Guide
Every engine code fitted to the Mini Roadster 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.
Petrol Engines
Extracted from detailed petrol and performance engine families across Mini Roadster variants.
Diesel Engines
Extracted from detailed diesel engine families across Mini Roadster variants.
Can't find your 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 Mini Roadster engine specialists. Every rebuilt engine comes with a minimum 12‑month unlimited mileage warranty.
Common Problems
Mini Roadster Engine Problems
What It Costs to Fix & When Replacement Makes Sense
Every rebuilt engine includes a minimum 12-month unlimited mileage warranty.
1. Mini Roadster Timing Chain Failure
Why N18 Turbo Engines Suffer Premature Drive Train Damage
Affected Models
Mini Roadster Cooper S & John Cooper Works (R59, 2012-2015, N18B16A)
Typical Failure Mileage
50,000 - 85,000 miles
Root Cause
The early Prince N18 design uses a rear-mounted timing chain with an inadequately tensioned plastic guide and weak hydraulic tensioner. Under repeated heat cycles, the tensioner loses pressure, allowing the chain to slack and strike the guide.
Repair Options & Estimated Costs (UK ranges)
| Repair Tier | Dealer Price | Specialist Price | What It Involves | Longevity / Suitability |
|---|---|---|---|---|
Minor - Preventative Chain Kit Replacement Minor | £950 - £1,400 | £550 - £850 | Tensioner (OEM 11347585994), guides, chain, and gaskets replaced before catastrophic slack occurs. | 100,000+ miles. Only viable before rattle or oil starvation begins. |
Full Replacement - Rebuilt N18 Engine Best Value | £4,200 - £5,800 | £1,900 - £3,100 | Supply & fit of a bench-tested rebuilt unit with upgraded tensioner, reinforced oil pump, and fresh seals. | Lifetime of vehicle. Includes 12-month warranty and resolves all chain-related weak points. |
Our Recommendation
Best next step for mini roadster timing chain failure
If your Mini Roadster Cooper S or JCW is under 60k miles and running quietly, investing in a preventative chain kit is the most cost-effective route. Once you hear a metallic rattle at cold start or spot metal shavings in the sump, the oil pump has likely been starved by chain debris. At that stage, a minor fix will not restore safety, and a full rebuilt N18 with upgraded internals is the only reliable solution.
Don't Let Engine Failure Write Off Your Mini Roadster
The R59 chassis is a rare, driver-focused convertible, and preserving it shouldn’t mean paying main dealer premiums for known design flaws. Our network of UK Mini Roadster engine specialists understands exactly which upgraded components address timing chain stretch, oil burning, HPFP weakness, and turbo wastegate play. We connect you with vetted rebuilders who bench-test every unit, fit reinforced internals, and back your replacement with a nationwide 12‑month unlimited mileage warranty. Compare prices today and secure a reliable, specialist-verified solution without the dealership overhead.
Compare Mini Roadster Engine Replacement Prices Now →Mini Roadster Engine Problems
What It Costs to Fix & When Replacement Makes Sense
Affected Models
Mini Roadster Cooper S & John Cooper Works (R59, 2012-2015, N18B16A)
Typical Failure Mileage
50,000 - 85,000 miles
Root Cause
The early Prince N18 design uses a rear-mounted timing chain with an inadequately tensioned plastic guide and weak hydraulic tensioner. Under repeated heat cycles, the tensioner loses pressure, allowing the chain to slack and strike the guide.
Minor - Preventative Chain Kit Replacement
Dealer
£950 - £1,400
Specialist
£550 - £850
Tensioner (OEM 11347585994), guides, chain, and gaskets replaced before catastrophic slack occurs.
100,000+ miles. Only viable before rattle or oil starvation begins.
Full Replacement - Rebuilt N18 Engine
Dealer
£4,200 - £5,800
Specialist
£1,900 - £3,100
Supply & fit of a bench-tested rebuilt unit with upgraded tensioner, reinforced oil pump, and fresh seals.
Lifetime of vehicle. Includes 12-month warranty and resolves all chain-related weak points.
Our Recommendation
Best next step for mini roadster timing chain failure
If your Mini Roadster Cooper S or JCW is under 60k miles and running quietly, investing in a preventative chain kit is the most cost-effective route. Once you hear a metallic rattle at cold start or spot metal shavings in the sump, the oil pump has likely been starved by chain debris. At that stage, a minor fix will not restore safety, and a full rebuilt N18 with upgraded internals is the only reliable solution.
Don't Let Engine Failure Write Off Your Mini Roadster
The R59 chassis is a rare, driver-focused convertible, and preserving it shouldn’t mean paying main dealer premiums for known design flaws. Our network of UK Mini Roadster engine specialists understands exactly which upgraded components address timing chain stretch, oil burning, HPFP weakness, and turbo wastegate play. We connect you with vetted rebuilders who bench-test every unit, fit reinforced internals, and back your replacement with a nationwide 12‑month unlimited mileage warranty. Compare prices today and secure a reliable, specialist-verified solution without the dealership overhead.
Compare Mini Roadster Engine Replacement Prices Now →Disclaimer: All prices are indicative UK market ranges based on historical quote data and repair requests from our network of engine specialists. Dealer pricing is estimated based on published main dealer labour rates and genuine OEM parts pricing. Specialist pricing reflects actual quote data from EngineMarket’s UK network. Actual costs vary depending on damage severity, vehicle condition, variant, and workshop location within the UK. Use our free comparison tool to get tailored quotes for your specific Mini Roadster and engine code. Every engine supplied through EngineMarket carries a minimum 12‑month unlimited mileage warranty - always confirm exact terms with your chosen supplier.
12-Month Warranty
Upgraded Components
Nationwide UK Delivery
Save vs Main Dealer Price
Replacement Engine Options
Mini Roadster Engine TypesOptions, Costs & What to Expect
Every engine type is available through our UK specialist network, with typical price ranges tailored to your exact Mini Roadster variant, engine code and budget.
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 Mini Roadster within hours.
Engine Sizes
Mini Roadster Engines by SizeFind the Right Displacement for Your Variant
Every engine displacement fitted to the Mini Roadster across its UK production run is listed below, with compatible engine codes, variant applications and common failure notes to help you identify the correct replacement.
Mini Roadster Diesel Engine Sizes
The 2.0L diesel was the sole oil-burning option for the Mini Roadster, fitted exclusively to the SD variant across the R59 production run. This BMW-sourced N47 unit delivered strong low-end torque suited to the Roadster's sporty character, though it requires vigilant maintenance of its EGR and timing drive components to ensure longevity.
| Engine Code(s) | N47D20C |
| Compatible Models (UK) | SD, SD Highgate |
| Production Years | R59, 2012-2015 |
Common Failure Points
Watch for these known weak points
EGR cooler failure, timing chain tensioner wear at higher mileage
Not sure which engine size your Mini Roadster needs? Enter your registration number above - we'll identify the exact displacement, engine code and compatible replacement options instantly. All engines supplied through EngineMarket include a minimum 12‑month unlimited mileage warranty from UK Mini Roadster specialists.
Fuel Type
Mini Roadster Engines by Fuel Type
Choose your Mini Roadster engine by fuel type to compare realistic replacement prices, known issues, and compatible UK supply options - from the efficient 2.0L SD diesel to the spirited 1.6L Cooper S turbo petrol.
Mini Roadster Diesel Engines
Mini Roadster Diesel Engines
The sole diesel option for the R59 Roadster, the 2.0L N47 unit powered the SD variant across the model's 2012-2015 production run, delivering strong torque but requiring vigilant maintenance of its EGR and timing drive systems.
Common Mini Roadster Diesel Engine Families
N47D20C - SD variant 2.0L diesel, timing chain tensioner vulnerability
N47D20 - Earlier N47 code, shared Roadster failure patterns
Found In
R59 Roadster SD (2012-2015) - N47D20C
Known For
Strong low-end torque suited to convertible cruising
EGR cooler failure causing coolant loss around 70-100k miles
Timing chain stretch and tensioner wear between 80-120k miles
Higher UK replacement demand on SD variants with service history gaps
Typical Diesel Models
SD
SD Highgate
Not sure which fuel type your Mini Roadster 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 Mini Roadster specialists.
Engine Years
Mini Roadster Engines by YearWhat Was Fitted & When
The section covers all major engine changes across the R59’s 2012-2015 production run, organised so owners can quickly identify their model year and compare rebuilt engine prices from UK specialists.
2012 - R59 Roadster Launch & N18/N47 Introduction
Major Platform Change
The debut year introduced the dedicated R59 two-seater chassis with the turbocharged N18 petrol and N47 diesel families as the core powerplants.
Key Changes
Launch of the R59 Roadster body style on the BMW Prince platform
Introduction of N18B16A turbo engine for Cooper S and John Cooper Works
Diesel variant SD launched with 2.0L N47D20C engine
Base Cooper fitted with naturally aspirated N13B16A
Early production tensioner kits lacked the revised 11347585994 specification
Known For
First year of production with highest initial timing chain tensioner failure rates
R59-specific chassis mounts and revised turbo oil return routing differ from R56 hatchbacks
Strong enthusiast demand but early N18 HPFP and wastegate rattle complaints emerge
Generic R56 engines frequently noted as incompatible without significant modification
Main Engines
N13B16A - 1.6L petrol (Cooper)
N18B16A - 1.6L turbo petrol (Cooper S, John Cooper Works)
N47D20C - 2.0L diesel (SD)
Popular Models
Mini Cooper Roadster
Mini Cooper S Roadster
Mini John Cooper Works Roadster
Mini SD Roadster
Engine Codes Covered
N13B16AN18B16AN47D20C
Common Replacement Enquiries
Mini Roadster 2012 engine replacement
N18 timing chain tensioner 11347585994
Mini Roadster SD EGR cooler failure
Get quotes for 2012 Mini Roadster replacement engines
2012 - R59 Roadster Launch & N18/N47 Introduction
Major Platform Change
The debut year introduced the dedicated R59 two-seater chassis with the turbocharged N18 petrol and N47 diesel families as the core powerplants.
Key Changes
Launch of the R59 Roadster body style on the BMW Prince platform
Introduction of N18B16A turbo engine for Cooper S and John Cooper Works
Diesel variant SD launched with 2.0L N47D20C engine
Base Cooper fitted with naturally aspirated N13B16A
Early production tensioner kits lacked the revised 11347585994 specification
Known For
First year of production with highest initial timing chain tensioner failure rates
R59-specific chassis mounts and revised turbo oil return routing differ from R56 hatchbacks
Strong enthusiast demand but early N18 HPFP and wastegate rattle complaints emerge
Generic R56 engines frequently noted as incompatible without significant modification
Main Engines
N13B16A - 1.6L petrol (Cooper)
N18B16A - 1.6L turbo petrol (Cooper S, John Cooper Works)
N47D20C - 2.0L diesel (SD)
Engine Codes Covered
N13B16AN18B16AN47D20C
Popular Models
Mini Cooper Roadster
Mini Cooper S Roadster
Mini John Cooper Works Roadster
Mini SD Roadster
Common Replacement Enquiries
Mini Roadster 2012 engine replacement
N18 timing chain tensioner 11347585994
Mini Roadster SD EGR cooler failure
Get quotes for 2012 Mini Roadster replacement engines
Year Finder
Not sure which year your Mini Roadster was built?
Not sure which year your Mini Roadster was built? Enter your registration number and we'll identify the exact engine, model year, and compatible replacement options instantly - all backed by a minimum 12‑month warranty from UK Mini Roadster specialists.
FAQ
Mini Roadster Engine ReplacementFrequently Asked Questions
Question 1
How much does it cost to replace a Mini Roadster engine in the UK?
A rebuilt Mini Roadster engine typically costs £1,400-£3,200 supply-only, depending on variant and engine code. Supply & fit adds £450-£850 labour. N18 Cooper S units sit mid-range, while rare JCW N55 engines command premium pricing. All EngineMarket quotes include 12-month unlimited mileage warranty from vetted UK specialists.
Key points
- • N13 base Cooper engines: £1,200-£2,600 rebuilt supply-only
- • N18 Cooper S engines: £1,400-£3,200 with upgraded tensioner kits
- • N47 SD diesel units: £1,500-£3,600 including EGR system checks
- • Labour for supply & fit typically adds £450-£850 nationwide
Question 2
Is it worth replacing the engine in a Mini Roadster?
Yes, if your R59 chassis is rust-free and under £8,000 value. A rebuilt Mini Roadster engine extends life by 80,000+ miles for less than half the cost of a comparable replacement vehicle. Enthusiast demand keeps values stable, making engine replacement a sound investment for well-maintained examples.
Key points
- • R59 Roadster values hold well due to rarity and enthusiast appeal
- • Rebuilt engine costs £1,400-£3,200 versus £6,000+ for similar replacement car
- • Supply & fit service preserves warranty and ensures R59-specific compatibility
- • Upgraded tensioner kits address the N18's known timing chain weakness
Question 3
What causes the N18 engine to fail in the Mini Roadster Cooper S?
The N18B16A in Mini Roadster Cooper S models most commonly fails due to timing chain tensioner wear, allowing chain slack that damages guides and starves the oil pump. Secondary causes include valve stem seal hardening causing oil consumption, and HPFP failure triggering limp mode or no-start conditions.
Key points
- • Timing chain tensioner part 11347585994 requires upgrading on pre-2014 builds
- • Valve stem seals harden around 70k miles, causing blue smoke on overrun
- • High pressure fuel pump failure causes extended cranking or sudden power loss
- • Wastegate rattle indicates turbo wear but rarely causes immediate engine failure
Question 4
Will a standard R56 Mini engine fit my R59 Roadster?
Not directly. While the N18 and N13 engines share architecture with R56 hatchbacks, the Mini Roadster R59 uses stiffer chassis mounts, revised turbo oil return routing, and unique ECU calibrations. Fitting an R56 engine without R59-specific components risks cooling issues, mounting misalignment, and immobiliser faults.
Key points
- • R59 chassis mounts differ from R56 - verify donor engine mount points
- • Turbo oil return line routing is unique to Roadster convertible layout
- • ECU coding required to match Roadster immobiliser and instrument cluster
- • Specialist suppliers test engines on R59-specific dyno settings before dispatch
Question 5
How long does a Mini Roadster engine replacement take?
A supply-only Mini Roadster engine typically dispatches within 24-48 hours from UK stock. Professional supply & fit installation takes 1-2 working days at a specialist garage, plus time for ECU coding and road testing. Total turnaround from order to collection is usually 3-5 working days nationwide.
Key points
- • Rebuilt engines held in UK stock dispatch same or next working day
- • Specialist garages complete R59 engine swaps in 1-2 full working days
- • ECU coding and immobiliser matching adds 2-4 hours post-installation
- • Road test and final quality checks ensure no fault codes remain active
Question 6
Which Mini Roadster engine is most reliable - N13, N18 or N47?
The naturally aspirated N13B16A in base Mini Roadster Cooper models is statistically most reliable, lacking the turbo-related failures of the N18. However, all three engines require disciplined servicing. The N47 diesel offers strong economy but carries EGR and timing chain risks similar to other BMW applications.
Key points
- • N13 lacks turbo complexity, reducing failure points but still suffers valve seal wear
- • N18 turbo engines demand strict oil changes every 10k miles to protect the chain
- • N47 diesel timing chain sits at rear of block, making early detection difficult
- • All engines benefit from upgraded tensioner kits and synthetic oil servicing
Question 7
What warranty comes with a replacement Mini Roadster engine?
Every Mini Roadster engine supplied through EngineMarket includes a minimum 12-month unlimited mileage warranty from vetted UK specialists. Coverage includes parts and labour for manufacturing defects, with optional extended terms available. Always confirm exact warranty terms, claim process, and approved fitting centres with your chosen supplier before ordering.
Key points
- • 12-month unlimited mileage warranty is standard across EngineMarket's specialist network
- • Coverage includes internal components, gaskets, seals and manufacturing defects
- • Labour for warranty claims typically covered if fitted by approved specialist garage
- • Keep full service records and oil change receipts to maintain warranty validity
Question 8
Do I need to code the ECU after fitting a new Mini Roadster engine?
Yes, most Mini Roadster engine replacements require ECU coding to match the new unit's serial number to the car's immobiliser and instrument cluster. Failure to code can trigger immobiliser lockout, fault codes, or limp mode. Specialist fitters include coding in their supply & fit service using BMW-compatible diagnostic tools.
Key points
- • Immobiliser pairing requires coding the new engine ECU to the car's CAS module
- • Instrument cluster mileage and service intervals may need resetting post-installation
- • VANOS and throttle adaptation values require recalibration for smooth idle and response
- • Use ISTA/D or Autel tools - generic OBD scanners cannot perform full coding
Question 9
Can I upgrade my Cooper S Roadster to a JCW engine?
Technically possible but complex and costly. Swapping an N18B16A Cooper S engine for a JCW-spec unit requires matching turbo, intercooler, fuel system, exhaust, and ECU calibration. For most Mini Roadster owners, rebuilding the existing N18 with performance upgrades delivers similar gains at lower cost and without compatibility risks.
Key points
- • JCW N18 uses higher-boost turbo, larger injectors and revised ECU mapping
- • Cooling system upgrades required to handle increased thermal load from JCW spec
- • Exhaust manifold and downpipe differ between Cooper S and JCW Roadster variants
- • Insurance and DVLA notification required for significant power increase modifications
Question 10
Where can I find a trusted specialist for Mini Roadster engine replacement?
EngineMarket connects Mini Roadster owners with vetted UK engine specialists who understand R59-specific requirements. Each supplier is assessed for technical capability, warranty terms, and customer feedback. Use our free comparison tool to receive multiple quotes, verify R59 compatibility, and choose a specialist offering supply & fit with 12-month warranty coverage.
Key points
- • Specialists must demonstrate experience with R59 chassis mounts and cooling layout
- • Verify supplier offers rebuilt engines with upgraded N18 tensioner part 11347585994
- • Check reviews specifically mention Mini Roadster or R59 engine replacement success
- • Confirm warranty covers both parts and labour if fitted by their approved garage
Why Choose Us
Why UK Mini Roadster Owners Trust EngineMarket
Join thousands of UK drivers who compare Mini Roadster engine prices through our network of trusted specialists - every rebuilt and reconditioned unit backed by a minimum 12‑month unlimited mileage warranty and nationwide delivery.
Trusted Mini Roadster Engine Suppliers
Every garage and rebuilder is vetted and reviewed by real Mini Roadster owners.
Compare Mini Roadster Engine Replacement Companies
See prices, warranty terms and supply & fit options side‑by‑side.
UK Engine Replacement Services for Mini Roadster
Covering Cooper to John Cooper Works, supply‑only or full supply & fit nationwide.
Find the best Mini Roadster engine replacement near you
Compare engine prices for Mini Roadster in the UK and get competitive quotes from garages near you.
100% FreeNo ObligationFast & secure processUK-based support
Trusted supplier network
Warranty-backed rebuilt & used options
Every quote checked for fitment, quality and lead time.