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MINI Cooper S & JCW 40mm Turbo Upgrade | Gen2 R55 R56 R57 R58 R59 R60 R61

MINI Cooper S & JCW 40mm Turbo Upgrade | Gen2 R55 R56 R57 R58 R59 R60 R61

MINI Cooper S & JCW 40mm Turbo Upgrade | Gen2 R55 R56 R57 R58 R59 R60 R61
Selected: New Turbo
Part No: G2NME2840
Specially Priced. Discounts Do Not Apply.
This Item has a $250.00 core charge.
Fits the following:
MINI (2002-Current)
Select variations below for more information:

Turbo upgrade / replacement  for your 2nd Generation Turbocharged Cooper S! This is a great replacement and upgrade for any stock Turbo and a "Direct Replacement" using the same K03 Turbo as stock but with a upgrade in performance (larger compressor section). These units will outperform the factory JCW Turbos!  Engineered to be a reliable and high-performance replacement. If your Turbo has 'bit the dust' - why not give it a bump in performance?

NOTE: Photos and images shown are approximations of the product and may not represent the actual product.


IMPROVE PERFORMANCE AND SAVE $$$ !!! Borg Warner supplies their K03 turbo with the 37mm compressor to MINI for all their 2nd generation MINI Cooper S models. These NEW JMTC units are the same Borg Warner K03 units that have been engineered to be just as reliable with a bump in performance with a larger compressor turbine at a MUCH LOWER cost than the Factory replacement unit! It's a NO-BRAINER!


The following Cooper S and JCW models:

2007-2013 R56 MINI Cooper S Hardtop including JCW
2008-2014 R55 MINI Cooper S Clubman including JCW
2009-2015 R57 MINI Cooper S Convertible including JCW 
2012-2015 R58 MINI Cooper S Coupe including JCW
2012-2015 R59 MINI Cooper S Roadster including JCW
2011-2016 R60 MINI Cooper S Countryman including JCW

Compatible with N14 and N18 engines.

Include the 17 digit vin number from you MINI when ordering.

NOTE:  The lower coolant line will need to be 'flipped' 180 degrees to clear the wastegate shaft.

See the Turbo Application Guide to see all the options for replacement and upgraded Turbo's.

For Turbo related replacement hardware, see our Mini Cooper Turbo Installation Hardware Application Guide.



[ ] Larger 40mm compressor
[ ] Extended tip compressor wheel
[ ] Designed for higher pressure
[ ] 360 Bearing (unlike the factory Borg Warner JCW turbo)
[ ] High temperature alloy turbine housing
[ ] Twin scroll turbine housing
[ ] Water cooled bearing housing

The JCW Upgrade high pressure high-flow Dual scrolling turbine uses a extended tip compressor to give you boost that starts early and last long. this turbocharger delivers outstanding response with torque and power gains across the entire power-band. If you are looking for a great street upgrade that delivers full race performance this is the turbo for you. It will deliver great torque, spooling at 2000rpms, and last long. For race applications we recommend high flow / low backpressure aftermarket exhaust system which will allow this turbo to reach its full potential. This Turbo is engineered to be a reliable and high-performance upgrade turbo for Mini JCW (up to 255hp) and this version is built in the USA!  

Maximize your power gains with the ECU upgrade from the supplier of these Turbo upgrades.


Additional Core Deposit is charged with every Turbo order. Core charges are refunded when a 'Rebuildable' and 'matching' core from your MINI is returned and inspected by the manufacturer.

All or part of the core deposit may be forfeited if the core:

  • Is severely damaged and not rebuildable
  • Does not match the unit being purchased (ie. if you send a stock turbo and order a JCW unit, part of the deposit is foreited).

The amount of core refund is determined at the discretion of the Turbo Manufacturer.



Also read the related Tech Articles listed at the bottom of this page.

Some States (like California) have ever tightening requirements for emissions testing and inspections. Always check your local regulations on compliance for street use.


Gaskets, seals, studs, and other hardware are NOT included. If you need to replace these items, order separately.

See our Turbo Install Kit. This kit includes all the most commonly replaced gaskets and seals, plus a new oil supply line. Additional gaskets, seals and other hardware may be required depending on the installation.

When servicing the Turbo on the MINI, it is very important (maybe even critical) that you replace the Turbo Oil Supply line to avoid potential future turbo issues.   (Included in the Turbo Install Kit).

Over time, the turbo and turbo supply line builds a fine layer of 'coked' or cooked oil on the internal surfaces. When you remove the supply line from the turbo, this disrupts the continuity of the coked layer with great potential of some of the coking to flake free. These coked oil particles can easily clog the fine journals that feed oil to the turbo bearings. Once the the oil flow is compromised, it is only a matter of time for cascading failures that can damage the turbo and catalytic converter! Don't take a chance - REPLACE the Oil Supply Line ! ! !

For additional protection, take a look at the Turbo Oil Supply Line Thermal Wrap.

For other TURBOCHARGER related products, see our TURBOCHARGER products page.


We STRONGLY recommend you change the motor oil more frequently than the factory recommendation. Anecdotal evidence suggests Turbo's with more frequent oil changes have fewer issues. We suggest 5000 mile oil change interval or less. Make sure you use FULL SYNTHETIC motor oil with the ACEA (Association des Constructeurs Europeens d'Automobiles) A3/B3 specification.

After a long or hard drive, drive 'easy' for a while just before your destination. This will reduce the engine and oil temperatures to lower operating levels. Also make a habit to let the engine idle for a couple minutes before shutting off. This will help cool the turbo preventing oil coking in the journals and bearings. Yes, the MINI has an auxiliary water pump that runs after shutdown to help cool the turbo, BUT - the oil isn't cirulating - it just sits there waiting for the turbo to cool. This is why we recommend you idle before shutdown - let the oil circulate while the temperature comes down.

MANUFACTURER'S INSTALLATION REQUIREMENTS to validate Manufacturers Limited Warranty: 

[ ] Replace the turbo oil supply line with the turbo.
- - - Due to excess heat round the turbocharger and particulates suspended in the turbo supply oil the oil will harden or "coke~ in the turbo and oil supply lines. If the oil supplyline is not replaced with the turbocharger the coked oil will break free from the side walls of the oil supply line and damage the turbocharger bearings. Cleaning the oil line will not help and only aggravate and increase the likelihood of the turbo failure due to coked oil breaking free form the sidewall.

[ ] Replace the catalytic converter on mini coopers before installing a new turbo.
- - - The Catalytic converters in the downpipe and B pipe may look clear but if any oil leaked into it some of the holes might be blocked and will cause back pressure. This starts to happen on Mini Coopers at 15k miles! Exhaust back pressure causes premature failure of the turbocharger. Turbochargers are not designed to have pressure on the exhaust side. As an alternative, have your catalytic converter refurbished to restore original flow.

[ ] Prime the turbocharger.
- - - No oil on the turbocharger bearings will cause failure of the bearings if they are dry even for a short period of time. Prime the new turbo with oil before you connect the oil lines.  For maximum protection, see Turbo Additive for Priming New Turbo's

[ ] Fresh engine oil with a turbocharger change
- - - Perform an oil change with full synthetic motor oil at the factory recommended viscosity when you install a new turbo. Change the oil again after one heat cycle if:  the engine is brand new, newly rebuilt, or if your MINI had a catastrophic turbo failure.


Manufacturers Limited Warranty covers all turbochargers to be free of defects in materials and workmanship for normal use and service up to 1 year (2 years if the oil line is replaced) after retail purchase. Manufacturer reserves the right to examine any part returned for warranty claim to determine whether a defect in materials or workmanship exists in such product. Manufacturer liability is limited to repairing, replacing or crediting towards other product, and credits will not exceed the invoice total for the parts.

Labor and storage charges are not products of the manufacturer and, therefore, will not be reimbursed for any reason. Final determination of the condition and suitability of the parts for uses contemplated by the buyer and is a sole responsibility of the buyer. Manufacturer will not be liable for any damage or injury to persons or property that might be claimed as a result of improper installation or misuse of any part subjected to this warranty. No warranty claim or refund, will be given until the item is in our possession and we have processed it which can take up to 20days.

Before installing any of our products it is the responsibility of the installer/owner to fix or resolve any and all problems that cause the original part/item to fail and can cause the new part/item to fail. Since we do not troubleshoot, we take no responsibility for incorrectly diagnosing the issue that caused the initial part/item to fail. There are no warranties expressed or implied beyond those set forth above.


Take a look at these informative videos that will help you avoid potential pitfalls with the Turbo:

How to Kill a New Turbo Part 1 - Oil Line

How to Kill a New Turbo Part 2 - Catalytic Converter

How to Kill a New Turbo Part 3 - No or Low Oil

How to Kill a New Turbo Part 4 - Using the Correct Oil

NOTE: Some states (like California) have ever tightening requirements for emissions testing and inspections. Always check your local regulations on compliance for street use.


My turbo requires replacement due to a diagnosed waste gate leakage causing a sensor to detect this condition, causing the check engine light to illuminate. My question is, I’d rather purchase the refurbished turbo due to the lower cost. Does the refurbished turbo have its waste gate re-machined to ensure a tight seal?
Yes, the refurbished turbo is reconditioned to meet new turbo spec's or better, so the waste gate seal is tight.

Happy Motoring
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