Mini Convertible Cooper Engine ReplacementCompare Prices & Get Quotes
Get quotes today from trusted UK Mini Convertible Cooper engine specialists. Compare prices on reconditioned, rebuilt and used engines to find the most reliable and cost-effective solution for your vehicle.
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
From £1,500 to £3,200 [ESTIMATED - using B38 family proxy]
Used from £600 · Reconditioned from £900 · Common codes: W10B16A, N12B16A, N16B16A, B38A15A
From £600
Tested, bare/short engine
From £900
Rod bearings addressed, tested
From quote
Upgraded bearings, full teardown, revised valvetrain
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3 Simple Steps3 Simple Stepsto Finding the Best Mini Convertible Cooper Replacement Engineto Finding the Best Mini Convertible Cooper Replacement Engine
Most replacements completed within 3-5 days.
Variant HistoryMini Convertible Cooper - Engine History & Specs at a Glance
When the Mini Convertible Cooper launched, it brought iconic go-kart handling to the open-top range. Over its lifecycle, the variant transitioned from the Chrysler-sourced W10 naturally aspirated engine to BMW's N12/N16 Valvetronic units, and finally to the modern, efficient B38 turbocharged three-cylinder architecture.
Variant HistoryMini Convertible Cooper - Engine History & Specs at a Glance
When the Mini Convertible Cooper launched, it brought iconic go-kart handling to the open-top range. Over its lifecycle, the variant transitioned from the Chrysler-sourced W10 naturally aspirated engine to BMW's N12/N16 Valvetronic units, and finally to the modern, efficient B38 turbocharged three-cylinder architecture.
Mini Convertible Cooper
Fuel TypePetrol
Engine Size Range1.5L-1.6L
Power Output Range120-136hp across the variant's historyEngine History Timeline
W10B16A 1.6L, 120hp (R52 generation launch)
N12B16A 1.6L, 120-122hp (R57 generation launch, introduction of Valvetronic technology)
N16B16A 1.6L, 122hp (R57 LCI facelift, featuring revised piston rings and improved PCV system)
B38A15A 1.5L Turbo, 136hp (F57 generation launch, shift to modular turbocharged architecture)
Key Specs Snapshot
Fuel TypePetrolEngine Size Range1.5L-1.6LPower Output Range120-136hp across the variant's historyYears Produced2003-2024Every engine fitted to the Mini Convertible Cooper is covered below, with UK rebuilt pricing and known failure points.
Mini Convertible Cooper Engine Codes - Specifications & Replacement CostMini Convertible Cooper Engine Codes - Specifications & Replacement Cost
1.6L Petrol (2003-2008)
Power Output120hpYears Fitted2003-2008
Compatible Trim Levels
- Cooper
- Cooper Chilli
- Cooper Park Lane
- Cooper Checkmate
Find your exact engine code, specs and UK replacement cost guide.
Used
Tested, ready-to-fit engine
£600-£900
Reconditioned
Addressed known issues, tested
£900-£1,500
Rebuilt
Full teardown, upgraded internals
£900-£2,000
Common Failure
Valve cover gasket oil leak and water pump housing cracks, typically occurring between 50,000 and 80,000 miles.
The Mini Convertible Cooper is generally reliable, but its naturally aspirated and modern turbocharged engines have specific, well-documented wear points. Valvetronic motor failures on N12/N16 engines and timing chain guide wear on the modern B38A15A account for the majority of Mini Convertible Cooper replacement requests. Rebuilt engines through EnginesMarket include upgraded components addressing these original failure points, plus a minimum 12-month unlimited-mileage warranty.
Why the Mini Convertible Cooper N12/N16 Wears Prematurely
Affected Vehicles
Mini Convertible Cooper (N12B16A, N16B16A, 2007-2015)
Typical Failure Mileage
70,000-100,000 miles
Root Cause
The Valvetronic eccentric shaft sensor and motor can fail under heat cycling, while worn piston rings and PCV valves lead to excessive oil consumption, carbon buildup, and potential catalytic converter damage.
Why It Happens
The Valvetronic eccentric shaft sensor and motor can fail under heat cycling, while worn piston rings and PCV valves lead to excessive oil consumption, carbon buildup, and potential catalytic converter damage.
Dealer (parts + labour)
£600-£900
Specialist (parts + labour)
£400-£700
What it involves
Replaces faulty Valvetronic motor/sensor and upgrades the PCV valve assembly to regulate crankcase pressure.
Suitability
Viable if oil consumption is mild and no internal scoring has occurred.
1 - 2 daysDealer (parts + labour)
£2,000-£2,600
Specialist (parts + labour)
£1,100-£2,600
What it involves
Complete unit swap featuring factory-spec assembly, updated piston rings, revised PCV routing, and bench-tested compression. Includes 12-month warranty.
Suitability
The right call if oil burning is severe, spark plugs are fouled, or the cylinder head has sustained damage.
1 - 2 daysAll prices are indicative UK market ranges based on current UK specialist supplier data.| Repair Tier | Dealer (Parts + Labour) | Specialist (Parts + Labour) | What It Involves | Suitability | Estimated Time |
|---|---|---|---|---|---|
 Minor - PCV & Valvetronic Motor Replace Minor | £600-£900 | £400-£700 | Replaces faulty Valvetronic motor/sensor and upgrades the PCV valve assembly to regulate crankcase pressure. | Viable if oil consumption is mild and no internal scoring has occurred. | 1 - 2 days |
 Full Replacement - rebuilt/reconditioned engine Best Value | £2,000-£2,600 | £1,100-£2,600 | Complete unit swap featuring factory-spec assembly, updated piston rings, revised PCV routing, and bench-tested compression. Includes 12-month warranty. | The right call if oil burning is severe, spark plugs are fouled, or the cylinder head has sustained damage. | 1 - 2 days |
Vehicle Value Check
Vehicle Value Check
- Vehicle worth under ~£5,000: repair or used engine typically makes more sense than a full rebuilt unit. - Vehicle worth ~£5,000-£8,000: evaluate both; reconditioned is viable if keeping the car 2+ years. - Vehicle worth ~£8,000-£15,000: reconditioned/rebuilt usually justifies the premium via warranty and reliability. - Vehicle worth £15,000+: replacement cost is typically small relative to vehicle value. A typical R57 Mini Convertible Cooper (2007-2015) currently falls into the £3,000-£6,000 value band. Therefore, a targeted Valvetronic repair or a quality used engine is often the most economically sensible route, as a full rebuild may approach the vehicle's total market value. Evaluate part-exchange value first if the chassis shows significant wear.
Our Recommendation
Our Recommendation
If oil consumption is mild, replace the PCV valve immediately and monitor levels. However, if the Valvetronic motor has failed or oil burning is severe, a rebuilt N16B16A engine with updated rings and PCV components offers the best long-term value and prevents repeat failures.
Don't Let Engine Failure Write Off Your Mini Convertible Cooper
The Mini Convertible Cooper's iconic driving experience shouldn't end because of a single factory design weakness. Whether you are dealing with Valvetronic faults, oil consumption, or timing chain rattle, EnginesMarket connects you directly with verified UK Mini Convertible Cooper specialists who understand these exact 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 rebuilt N16B16A Mini Convertible Cooper engine prices
12-Month Minimum
UK Specialists Vetted
Best Price GuidanceImportant Information
Important Information
"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 EnginesMarket'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 Convertible Cooper. Every engine supplied through EnginesMarket carries a minimum 12-month unlimited mileage warranty - always confirm exact terms with your chosen supplier."
Mini Convertible Cooper Engine ReplacementFrequently Asked Questions
Question 1How much does a Mini Convertible Cooper engine replacement cost-
Mini Convertible Cooper engine replacement costs typically range from £900 to £3,200 for a rebuilt unit, depending on the generation and engine code. Rebuilt units offer the best balance of reliability and value for most UK owners.
- W10B16A and N16B16A rebuilds average £900-£2,600 supply only.
- B38A15A replacements range £1,500-£3,200 typical rebuilt cost.
- Supply and fit labour adds £450-£950 depending on location.
- 12-month unlimited mileage warranty included with all EnginesMarket network suppliers.
Question 2What are the signs of Valvetronic failure in a Mini Convertible Cooper-
Mini Convertible Cooper Valvetronic failure often presents as a rough idle, loss of power, or a check engine light indicating eccentric shaft sensor faults.
- You may also notice excessive oil consumption and blue smoke from the exhaust.
- Ignoring these signs can lead to carbon buildup fouling the catalytic converter.
- If the Valvetronic motor fails completely, the engine may enter limp mode or refuse to start.
Question 3Is it worth replacing the engine in an older R57 Mini Convertible Cooper-
It depends on the vehicle's overall condition and current market value. An R57 Mini Convertible Cooper is typically valued between £3,000 and £6,000.
- If the rest of the car is in excellent condition, a used or reconditioned engine can extend its life cost-effectively.
- If the vehicle has multiple other faults, the replacement cost may exceed the car's total value.
- Always evaluate the full vehicle condition and part-exchange value before committing to a rebuild.
Question 4How long does a Mini Convertible Cooper engine replacement take-
A professional supply and fit service for a Mini Convertible Cooper 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 updating the ECU mapping.
- Nationwide delivery of the engine can add 1-2 days to the overall timeline.
- Specialists perform post-fitment diagnostics ensuring seamless ECU communication and fault clearance.
Question 5What is the difference between the R57 and F57 Mini Convertible Cooper engines-
The R57 (2009-2015) uses the 1.6L N12B16A or N16B16A naturally aspirated engine producing 120-122hp, relying on Valvetronic technology. The F57 (2016-2024) uses the 1.5L B38A15A turbocharged three-cylinder engine producing 136hp.
- The B38A15A offers better fuel efficiency and lower emissions, ensuring ULEZ compliance.
- The N16B16A is simpler but prone to oil consumption and Valvetronic motor wear.
- Replacement parts and rebuilt units are specific to each generation's engine code and are not interchangeable.
Question 6Can I get a ULEZ-compliant replacement engine for my Mini Convertible Cooper-
Yes, both the older N16B16A and the modern B38A15A Mini Convertible Cooper engines meet the required Euro emissions standards for ULEZ compliance.
- The B38A15A is fully Euro 6 compliant and exempt from London clean air zone charges.
- The N16B16A meets Euro 5 standards, which is also currently ULEZ compliant for petrol vehicles.
- All rebuilt engines supplied through EnginesMarket retain original emissions hardware ensuring MoT compliance.
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