JM40 (JCW) Turbocharger Mini Cooper All R series N14 and N18

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Product Overview

JM40 K03 turbocharger

JM40 K03 turbocharger is engineered to be a reliable and high-performance upgrade turbo and works well with all OEM components.  The JMTC's high-flow twin scrolling JM40 turbcharger uses our 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. It will deliver great torque, spool early, and last into the higher RPMs. 


JMTC Dual Scroll Turbo and Cartridge
  • JCW/JM40 40mm compressor
  • Extended tip compressor wheel
  • High temperature alloy turbine housing
  • Twin scroll turbine housing
  • Water cooled bearing housing
OEM/Interchange 53039880146 


Notes, We recommend installing a new oil supply line and new or our refurbished catalytic converter and will extend the warranty to 2 years when ordered together. 
Fits all Mini S and JCW N14 and N18 as well as the Peugeot RCZ 200 whit the THP engine. Price Includes the core charge of $250 that will be refunded when a rebuttable core is returned to JMTC.
Refurbished turbos have the same warranty as the new turbo however they have been previously used so they may have defects. Refurbished turbos may have scratches, dents, and the housings can be cracked we also machine, modify and weld the housings so they may have defects. We guarantee that they will function, perform, and operate normally as well as a new unit or we wouldn't waste our time rebuilding them. Any issue that might cause functional or performance issues have been repaired or replaced. If you are concerned about visual defects please purchase a new unit.


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  • 5
    Made install a breeze

    Posted by Mark Kissel on Sep 16th 2018

    Packed well, went togather without any issues.

  • 5
    Great pruduct, Better service

    Posted by Michael Duffy on Jun 28th 2018

    I just purchased and installed a refurbished JM40 for my Countryman. Even before it arrived I was emailing Arric a bunch of questions! Then after I ran into an issue with my install and end result, I had a few more emails and phone calls with Arric. This guy know his stuff! He was basically able to diagnose exactly what my issue was just by asking me a few simple questions on the phone! Just like that! The problem was solved, my car is making boost again better than ever. Thank you Arric! Buy their turbos! Lol

  • 5
    Nice upgraded Turbo

    Posted by Ed on Jan 9th 2018

    Extremely happy with this turbo. It’s like a new unit for half the price of the dealer. Arric is super knowledgeable on his product and as a bonus they were right here local in Phoenix. If I were ever in the need of another unit would definitely buy from them again.

  • 5
    Shipment was very satisfactory.

    Posted by Noe Rojas on Sep 18th 2017

    Even for a refurbished turbo, it feels like I've bough a brand new turbo From the dealer. Packaged very safely, and their refinishing is very good. I can tell there are picky inspectors at JM Turbos! Only bad thing is I wished i had paid the extra money to get it bored.