The patented ProFlex™ Commander adaptive flex fuel system for 1998-03 BMW E39 M5 allows you to start making more power and running cooler with E85. True plug and play flex-fuel for your M5 in about an hour with no tuning required.

ProFlex Commander Features:

Complete system - everything you need to run E85
100% Dyno tested for safety, durability and power gains
Easy installation for your professional BMW shop (see note)
Patented BlendSense™ technology adjusts in real time with 30 millisecond refresh rate
True flex fuel - switch from gas to ethanol and back anytime
Improved injector management for more power on gas or E85
7-10% More wheel HP and torque on E85 (dyno proven)
No tuning required - Compatible with stock or performance gas tunes; instantly adapts to new tunes
Cleaner emissions and cooler cylinder, oil and coolant temps
Race grade fuel at the pump - high octane, low cost
Compatible with power adders and bolt-ons
ProFlex Connect app provides accurate, real-time ethanol content on your iPhone or Android device via BT Wireless communication
Cold Start Plus™ - improves fuel atomization for easier starting in cold weather

NOTE: While most of our systems are DIY your M5 requires specific routing around sensitive accelerator linkage. Professional installation is recommended.

This System Fits: 1998-03 E39 M5

Choose Commander Pro (option below)

Choose the ProFlex Commander Pro for your vehicle if you have aftermarket forced induction or aftermarket 600cc/60lb/hr or larger injectors. If you plan to make these upgrades later order the PRO. It will work fine with your existing set-up and will automatically adapt when you install your upgrades.

The Commander PRO was specifically designed for improved injector function in forced induction

The ProFlex Commander product line is backed by a limited 12 month warranty. Learn more.

Vehicle Fitment

Submodel	Engine	Years
E39 M5	4.9L V8 S62	1998-2003

BMW E39 M5 dyno on E85

The ProFlex Commander and E85 added 24WHP and 18TQ to this BMW E39 M5 on the dyno when compared to pump gas (93 octane).

Installation Guide

This video shows the wiring harness installation steps for the E39 M5. Please download the full system installation instructions here (coming soon).

PROFLEX Connect App

With the free PROFLEX Connect app you can connect your smartphone to your PROFLEX Commander and view your vehicle’s ethanol content in real-time, locate and navigate to E85 pumps near your location and run system monitoring and diagnostics. Available for iOS and Android. Click here to learn more.

Your browser is out-of-date!

BMW

Selected

SelectYear

SelectModel

SelectProduct

ProFlex Commander for BMW E39 M5 (S62)

$899.00