Cart 0
BMS BMW N20 N26 N55 S55 JB1 Stage 1 Tuner

BMS BMW N20 N26 N55 S55 JB1 Stage 1 Tuner (M2 Competition, M135i, M235i, 335i, 435i, M3 & M4)


  • £355.03
    exc. VAT £295.86
  • 1

In Stock


This plug and play tuner attaches to two easy to access sensors in the engine bay and works with your factory DME tuning to remap your boost, timing, and fuelling for optimal performance and reduced turbo lag. It features a 64mhz processor allowing sensors to be sampled 800 times per second using dedicated 10 bit digital to analog converters, ensuring smooth and powerful performance. The same box automatically detects whether you have an N20, N55, or S55 motor based on the TMAP sensor voltage and adjusts the tuning accordingly.

Power gains on the N20 motor are up to 45 horsepower and 60 torque (35hp and 50tq at the wheels), on the N55 motor are up to 50 horsepower and 65 torque (40hp and 55tq to the wheels), and on the S55 motor up to 60 horsepower and 75 torque (50hp and 60tq to the wheels).

Installation is very discrete and it quickly removes without a trace when needed. Fuel economy during normal driving is unchanged. Compatible with all driving modes.


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. 



N55 Stage 1 Applications:

BMW 1 Series
• 2011+ E87 135i
• 2011+ E82 135i
2012+ N55 BMW F20 F21 M135i

BMW 2 Series
• 2014+ N55 BMW F22/F23 M235i

BMW 3 Series
• 2011+ N55 BMW E90 E91 E92 E93 335i/xi
• 2012+ N55 BMW F30 F31 335i/xi
• 2013+ N55 BMW F34 335i xDrive GT

BMW 4 Series
• 2014+ F32 F33 F36 Coupe 435i / 435xi

BMW 5 Series
• 2010+ F07 535i GT
• 2011+ F10 F11 535i / 535xi

BMW 6 Series
• 2011+ F13 640 Coupe
• 2011+ F12 640 Convertible
• 2012+ F06 640 Gran Coupe

BMW X Series
• 2013+ X1 N55 TwinPower
• 2011+ X3 X5 X6 N55 TwinPower
• 2017+ BMW X4 M40i

BMS BMW N55 JB1 Stage 1 Performance Tuner Install Guide

N20 / N26 Stage 1 Applications:

BMW 2 Series:
• 2014+ 2 Series F22/F23 220i / 228i N20 & N26

BMW 3 Series:

• 2012+ 3 Series F30 320i / 328i N20 & N26

BMW 4 Series:
• 2014+ 4 Series F32/F33/F36 420 / 428 N20 & N26

BMW 5 Series:
• 2011+ 5 Series F10 520 / 528 N20 & N26

BMW X Series
• 2013+ X3 F25 N20

BMS BMW N20 N26 JB1 Stage 1 Tuner Install Guide | ML Performance

S55 Stage 1 Applications:

• 2018+ F87 M2 Competition

• 2014+ F80 M3

• 2014+ F82 M4

BMS BMW S55 JB1 Stage 1 Performance Tuner Install Guide | ML Performance


N55 Stage 1 Dyno Results (Click to enlarge)

 BMS BMW F Chassis N55 N20 N26 S55 Stage 1 BMW Tuner N55 Stage 1 Dyno


2014 M235 Comparing Dinan DTRONICS Stage1 and BMS Stage1BMS BMW F Chassis N55 N20 N26 S55 Stage 1 BMW Tuner M235i Stage 1 Dyno | ML Performance UK


2012 328i N20 Stage 1 Dyno Result

BMS BMW F Chassis N55 N20 N26 S55 Stage 1 BMW Tuner N20 328i Stage 1 Dyno

N20 Stage 1 VBOX Tests
BMS BMW F Chassis N55 N20 N26 S55 Stage 1 BMW Tuner 328i VBOX Test


Free Next Day UK Delivery

FREE UK next day delivery on stock items if ordered before 11am! We can also ship worldwide, simply contact us for a quote.



5 Year BMS Repair Warranty


Manufactured by

Burger Motorsports


Part Number


Customer Reviews

5 Based on 1 Reviews
5 ★
4 ★
3 ★
2 ★
1 ★
Write a Review

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Paul Smith

JB4 / 2015 N20 - 428i

Purchased a JB4 for my 428i Coupe 2015 N20 , arrived in a well packaged small box . Easy to install and my car has a new lease of life , it is much faster than stock and when throttle is fully pressed the engine seems to respond smoother without screaming as much at high revs , I actually get 2 MPG than before too , since install i use it as a daily driver and I have also driven it to the South of France and back to the UK and covered 4,000 miles without any problems . I am very happy with my purchase and would recommend this product . Sales staff kept me informed With delivery times . Insta yIIslo Y II SLO