MHD N55 E-series

386 reviews
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About this app

MHD Flasher is the first Android handheld application to bring ECU tuning and monitoring to the BMW N55 engine for E series. The MHD Flasher reveals the good margin of power BMW left on the table with the N55 while still retaining the sophistication of the original engine management program.

→ Easy to install
Connect any compatible Android device to your car using an MHD Wifi adapter, install one of the pre-purchased MHD maps and enjoy the power and performance benefits of the MHD maps by Twisted Tuning.

→ Keep an eye on the tuning
Monitor your engine behavior using a configurable gauges layout to keep an eye on any of the 50+ engine monitors like oil temp, boost pressure, actual load or individual cylinder ignition timing. Activate the logging mode to save up to 50 monitors to a standard CSV file for later analysis. Track issues by reading the error codes, and delete them once resolved.

→ Flash your ECU back to a stock anytime, as often as you need to. No ECU backup is needed.

→ Custom tuning support
As an alternative to built-in maps, many tuners can provide advanced custom mapping for those who have higher or special performance needs.

Main features description:

═══ Flasher module ═══
- Flash built-in maps (purchased separately), custom user-tuned .BIN files or JB4 flash maps.
- Provides an ever growing list of handy options like PPK exhaust burble duration or cold start noise reduction.
- Read / delete engine trouble codes.
- Reset the main DME adaptation values.
- 1 minute map switching; initial install time: 7 mins.

═══ Monitor module ═══
- Extensive logging values list, up to 50 values at the same time.
- Save logging session to .CSV files
- Integrated csv log viewer
- Up to 8 configurable gauges

═══ Optional MHD maps packs ═══
- Maps by Twisted tuning
- Stage 1 pack. Eight maps: 4 fuel octane variants, stock / upgraded FMIC variants.
- Stage 2 pack. Eight maps: 4 fuel octane variants, stock / upgraded FMIC variants. High flow downpipes recommended.
- Ethanol mix map (e30). FMIC+DPs recommended.

Supported vehicles: N55 equipped Exx series.

2010-2013 135i, 135is and 335i
2013-2015 X1 35i
2010-2013 X5 35i
2011–2014 X6 35i

This racing product is for competition closed course use only.

Required hardware:
- 1 device running Android 4 and up
- 1 MHD Wifi adapter

Price list (licenses are VIN Locked and stored by Google along your Play store account):
- Flasher module: $199
- MHD maps packs: $49 each. Requires the Flasher module.
- Monitor module: $69


Q: Does my Android device need to be permanently plugged to the OBD port?
A: No. Once a flash is performed you can unplug your device.

Q: Do I lose my licenses if I delete the app or the Android device breaks?
A: No. licenses are stored online by Google, you can use your purchases on another device as long as you use the same account on Play store.

Q: Do I need to purchase a new license each time I flash a map?
A: No, you can ref lash as many times as needed.
Updated on
Sep 9, 2022

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info
Data is encrypted in transit
You can request that data be deleted
386 reviews
March 21, 2023
Bcus I had to find out the hard way it left me stranded when changing just burble settings from 0,5 to 0,3s and on my new Samsung galaxy a52s 5g flashing does not work at all it does start flashing and after 5min it stopsand it left the car inoperable I have to use my old Honor 9 lite Make sure that you stay on top of your device/app updates, chrome and device sync on otherwise its not working, try device restart aswell. I feel like its getting more complicated, please keep it simple, thank you.
1 person found this review helpful
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MHD Tuning UG
November 28, 2022
hi, 3 stars rating because you have to keep you stuff updated? thats not very nice to be honest, we have to follow rules from google like everybody else. please rethink your rating and only rate the overall tuning experience, not what google rules are that we can not affect or overcome...
A Google user
April 6, 2020
Went from using only JB4 to using a Burger Motorsports BEF tune installed via this app and it changed the cars driveability 100%. Playing with burble and other options via the app are also a plus. I can't speak to the OTS maps and their quality, since I'm stacking BMS products, but I'm thoroughly satisfied with this app. Now to just get E8x/9x N55 the standing burble. :) Car: '11 135i N55 DCT Suggestion: popup notice if device isn't in airplane mode before flash to remind user before starting.
15 people found this review helpful
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MHD Tuning UG
April 6, 2020
Hi, why only 4 stars if you are 100% satisfied? Airplane mode is not needed, just a recommendation.
Devin Noble
November 2, 2021
Yes, I have a question about my gauges not working. When I plug my phone up to my car, I click on the data logging button. It then sometimes says "contacting dme" or "if screen doesn't clear in 1 minute restart phone." I have tried all of that and the gauges show up, but they do not move when I am driving. What should I do?
2 people found this review helpful
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MHD Tuning UG
November 2, 2021
Please email us for support at Thanks

What's new

- Added support for upcoming MHD Universal Wifi adapter.