MG Flasher 4+

JR Auto Performance Inc.

Designed for iPad

    • 4.7 • 77 Ratings
    • Free



MG Flasher is a mobile App to tune your BMW equipped with an MG1 ECU and B46, B48 or B58 engine by OBD using ENET Wi-Fi. Flashing time on ENET is only 15 - 20 seconds! Disclaimer: For off-road use only.
*Initial flash/ECU unlock with ENET Wifi will take approximately 4 - 6 minutes.

Flashing your BMW with MG Flasher opens unique functions:
• Switchable Maps On-The-Fly - WORLD'S FIRST SOLUTION FOR BMW B58/B48 - through a simple combination of cruise control buttons you can quickly select between mapping, without the need to reflash vehicle! Gen 2 switchable maps, including all ethanol maps are under development.
• Dynamic Exhaust Burble On-The-Fly - via a simple combination of cruise control buttons you can change the intensity of the burbles whenever you like! MG Flasher offers Gen 2 adjustable options during flash; On-The-Fly features for Gen2 are under development.
• Max Cooling On-The-Fly - With a simple cruise control button combination sequence, you can enable the option without reflashing the car! Gen 2 adjustable options during flash; On-The-Fly features for Gen2 are under development.
• Torque Limit Adjustability - TCU 8HP Limiter Lifted for all platforms! Software calibration without the need for any transmission tuning or skewing the torque/load calculation model maps. This allows for accurate calculations, smooth shifting and no software trickery.
• Speed Limit Removal, Startup Roar, Torque by Gear Limiter and Burble Flame Map available on select software
• Ethanol Blends are built into our OTS maps and available using Switchable Maps (on select vehicles only)
• Cold start with CAT heating delete (racing/off-road use only)
• Sport Gauges (HP and TQ) adjustable by user!
• OTS maps prepared by MG Flasher tuners
• Custom maps flashing – flash custom maps prepared by us or other tuners/users
• Logger - log real time data and plot it into graphs for troubleshooting and optimizing
• Cloud Log Viewer - Professional log viewing on
• Diagnostic - Read and clear BMW specific DTC's
• Reset various adaptations, restore coding
• CVN number (Checksum Verification Number) along with flashing counter stays untouched. This means our software will be virtually invisible to dealer level diagnostic tools
Supported vehicles:
BMW M140i/120i/125i/M135i F20/F21/F40
BMW M240i/220i/225i/230i/228i/M235i - F22/F23/F44
BMW M340i/318i/320i/330i/330e - F30/F31/F34/G20/G21/G28
BMW M440i/420i/430i - F32/F33/F36/G22
BMW 540i/520i/530i/530e - G30/G31/G38
BMW 640i/630i - G32
BMW 740i/740Li/730i/730Li/740e/740Le - G11/G12
BMW 840i - G14/G15/G16
BMW X1 20i/25i/28i -F48
BMW X2 20i/25i/28i/M35i - F39
BMW X3 M40i/20i/30i - G01
BMW X4 M40i/20i/30i - G02
BMW X5 40i - G05
BMW X6 40i - G06
BMW X7 40i - G07
BMW Z4 M40i - G29
BMW Z4 20i/30i - G29
Toyota Supra - A90

What’s New

Version 419

- Adjust warning messages during initial Check Support action

Ratings and Reviews

4.7 out of 5
77 Ratings

77 Ratings

stock240 ,

Best ECU flash for B58 even at high altitude

Having tested MHD and BM3, by recollecting data from logs, dyno and dragy times, I can tell that by far MG flasher has the best OTS maps available for the B58 engine. The time gains in high altitude environments (8600ft) and low altitude envs is remarkable, without putting the engine components under maximum stress (from the data I’ve read on the logs testing the multiple maps they offer) which make them very reliable maps. I’ve been running stage 2 for 1 year in a 2018 M240i with 0 issues. Also the app is very well crafted and easy to use. The flash itself is very smooth, and it has great features such as map switching on the fly which is great feature for those out there using pump gas for the regular commute and E30 on the weekends. Their support is great and they always listen an reply to your questions in a timely fashion. I just have positive words for MG flasher and no complains, keep the great work guys.

NicOttawa ,

Great product great support

This product is awesome. The extra power for my B58 is kick-in-the-pants noticeable. I’ve sent them a question twice now and both times responded quickly and helpfully. Highly recommend.

Pekkaisawesome ,

The best tuning company!

Been using these guys for about a year, anytime I have ever had a question they were quick to get back to me and help me. These guys special in a couple bmw models and IMO are masters at their craft!

App Privacy

The developer, JR Auto Performance Inc., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Linked to You

The following data may be collected and linked to your identity:

  • Purchases
  • Contact Info
  • User Content
  • Identifiers
  • Usage Data
  • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

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