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BMS BMW Mini B38 B46 B48 JB+ (X1, X2, One, Cooper, Clubman & Countryman) - ML Performance UK

BMS BMW Mini B38 B46 B48 JB+ (M135ix, 228i, M235ix, X1, X2, One, Cooper, Clubman & Countryman)


  • £199.00
    exc. VAT £165.83
  • 3 reviews

A true plug and play tune offering safe and adjustable
30 Horsepower gains at the wheels! 

This is the JB+ for the BMW X1, X2 and MINIs with B38, B48 & B58 engines. This is the 4 wire version of the JB+.

Finally our popular and well proven Mini JB+ quick install tuner is available for B38, B46 & B48 applications! Boost is user adjustable up to 4.5psi over stock providing gains up to 30 wheel horsepower and 40 wheel torque on the B48 motor and up to 35 wheel horsepower and 35 wheel torque on the B38 motor.Timing and fueling remains managed seamlessly by the DME preserving all factory safety systems.

While the JB4 is the ultimate tuning tool the JB+ is a quick and simple way to add a few HP with minimal cost and minimal install effort. Something that anyone can buy, install in under a minute, and really feel from the drivers seat.

Fuel economy during normal driving is unchanged. Automatically detects the engine type upon installation allowing the same unit to be used for any B38 B46 & B48 application! Not legal for sale or use within California.

For those who want to start with the JB Plus and upgrade to the higher power more advanced JB4 tune, we offer a 100% trade up credit. To qualify simply purchase the JB4 system from our website directly and then after receipt mail back the JB Plus along with its purchase receipt from BMS or any authorized reseller and we'll issue a $199 refund against your JB4 purchase. Offer is valid for up to one year after purchasing the JB Plus. Made in the USA. 5 Year Warranty.

For the models with 3 wires, you will need the BMS BMW B38 B46 B48 B58 JB+ (inc. M140i, M240i, 340i, 440i & 540i) instead.


Compatibility Check

To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number(UK) or the last 7 digits of your VIN. Simply enter your car details prior to checkout. 



BMW 1 Series
 2019+ F40 B48 M135ix
BMW 2 Series
2019+ F44 B46 228ix
• 2019+ F44 B48 M235ix

BMW 3 Series
• 2020+ G20 B58 M340i/M340iX
• 2019+ G20 B48 330i/330iX
• 2019+ G20 B48 320i/320iX
BMW X Series
• 2016+ X1 B46/B48
• 2018+ G01 B48 X3 20i
• 2019+ G02 B48 X4 20i
• 2015+ B38 X1 sDrive18i
• 2018+ F39 B46/B48 X2
• 2017+ F39 B38 X2 sDrive18i 

• 2018+ F55/F56 B38 Mini One
• 2014+ F55/F56 B38 Mini Cooper
• 2015+ F54 B38 Mini Clubman
• 2017+ F60 B38 Mini Countryman
• MINI B38/B46/B48

Please Note: Only fits vehicles with 4 wires, please double check your stock sensor prior to ordering.


Fitted Photos



5 Year BMS Repair Warranty


Manufactured by

Burger Motorsports


Part Number


BMS BMW F Chassis B46/B48/B58 JB4 (M140i, 220i, M240i, 320i, 330i, 340i, 420i, 440i & X1 ) Installation Guide - ML Performance UK


JB+ Dyno results (Click to enlarge)

2016 BMW 340i, 91 octane, stock vs. JB Plus

BMS BMW B58/B46/B48 JB+ (M140i, 220i, M240i, 320i, 330i, 340i, 420i, 440i & X1 )


Next Day UK Delivery

Get FREE Guaranteed next day UK delivery for orders over £99 (exc. VAT), excluding larger items and certain remote postal codes/areas. Same day dispatch available if your order is placed before 1pm UK Time on all in stock items!

Worldwide Shipping

We ship worldwide via DHL International, simply enter your full address at checkout to see the shipping option(s) and quote(s). Same day dispatch available if your order is placed before 1pm UK Time on all in stock items!