# MHD Flasher

> BMW flash tuning app for complete DME remapping and engine monitoring. (iPhone/iPad app by MHD Tuning UG (haftungsbeschraenkt).)

- Source: https://appshunter.io/ios/app/mhd-flasher/id1468182144 (this page in markdown: same URL + `.md`)
- Developer: [MHD Tuning UG (haftungsbeschraenkt)](https://appshunter.io/developer/1445162439)
- Category: Utilities, Sports
- Price: Free
- Rating: 4.45/5 from 203 App Store ratings · 79 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.2 · 240 MB
- Languages: English, French, German
- Released: 2020-05-14
- Data updated: 2026-08-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/mhd-flasher/id1468182144/reviews.md

## What is MHD Flasher?

MHD Flasher is a complete flash tuning app for your BMW. Unlike a piggyback module, it is capable of complete DME remapping while retaining all OEM safety mechanisms. This allows for maximum performance,maximum safety, and unrivaled drivability.
---------------------------------------------
Full OBD Flashing: 
You can install MHD right at home and start tuning immediately!  Simply download the MHD Flasher app that connects via a Wi-Fi adapter to your iOS device and your vehicle’s OBD-II port, start the app, and within 4 minutes the initial installation is complete. Further map changes are much faster - only 20 seconds!  You can revert your vehicle to the factory OEM flash at any point, and no initial backup is necessary. 
---------------------------------------------
Stage 1, Stage 2 und E85 OTS (Off The Shelf) Maps by PureBoost:

N55 EWG (Vehicles built after 07/2013 with electronic wastegate):
- Stage 1 (up to 360HP/540NM) (not available for M2 and X4 M40i)
- Stage 2 (up to 390HP/580NM)
- Stage 2+ (up to 430HP/630NM) 
- Ethanol Mix Maps: Stage 1, 2 and 2+ E20 Maps for ethanol blends of 20%


N55 PWG (pneumatic wastegate):
- Stage 1 (up to 340HP/540NM)
- Stage 2 (up to 370HP/580NM)
- Stage 2+ (up to 400HP/630NM)
- Ethanol Mix Maps: Stage 1, 2 and 2+ E20 Maps for ethanol blends of 20%

S55 (BMW M3 / M4 F8x):
- Stage 1 (up to 530HP/700NM)
- Stage 2 (up to 560HP/780NM)
- Ethanol Mix Maps: Stage 1, 2 and 2+ E30 Maps for ethanol blends of 30%

B58:
- Stage 1 (up to 420HP/580NM)
- Stage 2 (up to 470HP/630NM)
- Ethanol Mix Maps: Stage 1, 2 Maps for ethanol blends of 30%
---------------------------------------------
Monitor your engine behavior to make sure it is running perfectly using a configurable and very responsive gauge layout. 50+ engine parameters are available at a glance! 

These are some of the available monitors:

- Boost, Boost Target
- Lambda (AFR)
- Intake Air Temp (IAT)
- Ignition Timing per Cylinder
- Coolant Temperature
- Oil Temperature, Oil Pressure
- Transmission Temperature
- High Pressure Fuel Pump (HPFP)
- Throttle Position
- Wastegate Duty-Cycle (WGDC)
- RPM
- Speed
- EGT
And many more…

MHD exclusive advanced monitor:

- Timing Corrections per Cylinder
- Boost target EX which can read higher than 22.x psi (the BMW boost target channel can't)
- Base Compressor Axis: Boost Setpoint, MAF req WGDC.
- Active Torque Limiters
And many more…
---------------------------------------------
These flash options can be applied to any map directly through the app:

- Exhaust Burble (duration & aggressiveness, min speed, min rpm)
- N20 Map Sensor (on N55)
- Remove top speed limiter (Vmax)
- Cold start noise reduction
- Exhaust flap open in sport mode
- Limit power per gear
- XHP TCU flash support (optimizied OTS maps)
- Sport cooling mode for increased water / air intercooler cooling (B58 only)
---------------------------------------------
Supported E-Series Vehicles: 
135i, 135is, 335i and 535i 2006-2013
335is 2011-2013
Z4 35i/is 2009-2015
1M 2011-2012
X1 35i 2010-2013
X5 35i 2010-2013
X6 35i 2008-2014


Supported F/G Series Vehicles:
M135i F2x N55 2012 - 2016
M235i F2x N55 2013 - 2016
M2 F87 N55 2015 - 2018
335i N55 F3x 2011 - 2015
435i N55 F3x 2013 - 2016 
535i / GT N55 F1x 2010 - 2017
640i N55 F0x 2011 - 2017
740i N55 F0x 2012 - 2015  
X3 35i N55 F25 2010 - 2017
X4 35i / M40i N55 F26 2014 - 2018
X5 40i N55 F15 2013 - 2018
X6 40i N55 F16 2014 - 2018

M3 S55 F80 2014 - 2019
M4 S55 F82 2014 - 2019
M4 S55 F83 2014 - 2019 

M140i F2x 2012 - 2019
M240i F2x 2016 - 2019
340i F3x 2015 - 2019
440i F3x 2016 - 2019
540i G3x 2017 -
640i GT G32 2017 -
740i G1x F0x 2015 -
X3 M40i G01 2017 -
X4 M40i G02 2018 -
X5 40i G05 2018 -
Z4 M40i G29 2019 -

114i F2x 2012 - 2015
116i F2x 2011 - 2015
118i F2x 2011 - 2016
120i F2x 2015 - 2017
316i F3x 2012 - 2018

X-Drive is supported on all cars.
All performance power kit cars are supported.

Check out our homepage / user manual for more information and recommended modifications for each stage.

## Key features

- Complete DME remapping
- Full OBD flashing
- Pre-configured performance maps (Stage 1, 2, E85)
- Advanced engine monitoring
- Customizable flash options
- Revert to factory OEM flash

## What do users think of MHD Flasher?

Overall sentiment: mixed

**Pros**

- 🚀 Fast flashing speeds (16-30 seconds)
- 👍 User-friendly interface and intuitive design
- 💪 Significant power gains and performance improvements
- 🎯 Excellent OTS (off-the-shelf) maps with multiple fuel options
- 📊 Comprehensive data logging and monitoring capabilities
- 🛡️ Strong safety features and safe mode protection
- 🔧 Easy to use without requiring external tools or computers
- 😊 Responsive and helpful customer support (historically)
- 🔄 Frequent updates and continuous platform improvements
- 📱 Available on both iOS and Android platforms
- ⚡ Reliable performance over extended mileage

**Cons**

- 🐛 Frequent app crashes and stability issues
- ❌ Recent update broke core functionality for many users
- 🔌 Connection problems with WiFi adapters
- 📵 Unable to open app after recent updates
- 😞 Poor customer support responsiveness (recent)
- 🚫 N54 app discontinued, forced migration to broken new app
- 💸 Lost custom tunes and features after migration
- 🔐 Login/authentication issues on new devices
- ⚠️ Inconsistent performance across different car models
- 🎮 Clunky and buggy user experience reported
- 🔄 Unable to transfer licenses or change login credentials

**Commonly reported bugs**

- App crashes on iOS 26.2 and newer versions
- Unable to flash after recent updates
- Unable to erase memory errors
- App fails to open after installation
- Connection constantly disconnects on N55 F30 platform
- Unable to upload logs to SpoolStreet
- Cannot edit burples settings after update
- Failed flashes (7+ consecutive failures reported)
- Invalid credentials error on new device login
- Monitor license not functioning
- Anti-lag feature cannot be removed once flashed
- Lumpy cold start with startup roar enabled
- WiFi adapter disconnects during mapping
- Unable to prepare memory section errors
- User guide PDF crashes app
- Missing custom tunes after app migration

**Most requested features**

- Add 94 octane fuel option
- Support for diesel engines
- Support for N63 engine tuning
- Max cooling fan option in new app
- Ability to change login email/username
- License transfer capability for car sales
- Support for Gen 2 B58 with MHD+ features
- Ability to revert to previous OTS map versions
- Detailed release notes for OTS map updates
- Custom tune file transfer to new app
- Burbles setting in regular mode (not just sport mode)

## Recent user reviews (10 of 79)

All indexed reviews: https://appshunter.io/ios/app/mhd-flasher/id1468182144/reviews.md

### 5/5 — Excellent tuning app and outstanding customer support

*2026-08-03, version 5.26*

I contacted MHD with a few technical questions about Stage 2 and Stage 2+ on my S55 engine. Their team responded quickly, clearly, and honestly. They didn’t try to sell me unnecessary upgrades—instead, they explained exactly what made sense for my setup and fuel quality.

It’s rare to find this level of transparency and technical knowledge. The app works great, the tuning is reliable, and the support is first-class.

Highly recommended!

### 2/5 — For b58 better off getting mg flasher

*2026-07-15, version 5.26*

Comparing the mhd b58 stage 2.5map 95oct with the mg flasher b58 stage 2.5map 95oct, the mg flasher has better throttle response , faster turbo spool , cleaner logs with no timing corrections.

### 5/5 — S63

*2026-05-19, version 5.24*

Make more options for s63 motors

### 3/5 — love the app

*2026-05-13, version 5.24*

just wished it worked with the n52 i love my n54 and the app works great but also have n52 that i would love to read data and everything and even tune but cant bc its not supported i just want one app for everything if they can add that i would be happy

### 3/5 — Update Issues

*2026-05-12, version 5.23*

The recent update has created two error codes for CAN 1 and CAN 2 sensor timeout.  The Ethanol sensor value is at 0%.  Following a reflash the car generated a Power Management Fault and Incorrect Shutdown Error.  The Ethanol sensor value went to 0 again.  No issues with car or software since last release.  Why do updates get pushed automatically?  I’d rather update after everyone exposes bugs and they are resolved. Clearly MHD tests code in production.

### 1/5 — Don’t download 5.22

*2026-05-08, version 5.22*

5.22 version is broken. Can’t log.

### 5/5 — Great platform

*2026-03-01, version 5.18*

Using it for mk5 Supra and it’s great

### 5/5 — User friendly

*2026-01-29, version 5.18*

User friendly super fast

### 1/5 — App is broken

*2026-01-22, version 5.16*

I cent open the app on my 17 pro max running ios26.2. I can’t use the n54 app because it only direct me to the new broken app.

### 5/5 — The app keeps crashing

*2026-01-22, version 5.16*

Can you please fix the app crash on the iOS device?

## Frequently asked questions about MHD Flasher

### What does the MHD Flasher app do?

The MHD Flasher app is a complete flash tuning application for BMW vehicles. It enables full DME remapping, allowing for enhanced performance and drivability while retaining OEM safety mechanisms. The app also provides advanced engine monitoring and customizable flash options.

### What are the key features of MHD Flasher?

Key features include full OBD flashing for easy installation and map changes, pre-configured Off-The-Shelf (OTS) maps for various stages and fuel types (like E85), advanced engine parameter monitoring, and customizable flash options such as exhaust burble, Vmax removal, and gear-specific power limits.

### Is MHD Flasher free to use?

Based on the provided information, the MHD Flasher app is available for free. There are no mentions of subscription fees, in-app purchases, or advertisements within the app's description.

### What BMW models are supported by MHD Flasher?

The app supports various E-Series BMW models including the 135i, 135is, 335i, 535i (2006-2013), 335is (2011-2013), and Z4 35i/is (2009-2015). It also supports N55, S55, and B58 engine variants, and has XHP TCU flash support.

### How does MHD Flasher compare to a piggyback module?

Unlike a piggyback module, MHD Flasher is capable of complete DME remapping. This means it directly reprograms the vehicle's Engine Control Unit (ECU) for more comprehensive tuning, while still ensuring all original OEM safety features are maintained for maximum performance and safety.

## Version history (last 5 releases)

### 5.26 — 2026-06-13

- Added new S58 flash option: Custom throttle pedal mapping per mode (normal/s/s+).
- Added advanced logging for new S58 00005C6414C808 ROM.
- Added generic "share" action alongside all prior "email" actions (logs, oem files, etc).
- Fixed issue with brap not working on some Gen2 B58 / S58 vehicles.
- Fixed various app bugs / crashes.

### 5.25 — 2026-06-09

- Added new S58 flash option: Custom throttle pedal mapping per mode (normal/s/s+).
- Added advanced logging for new S58 00005C6414C808 ROM.
- Added generic "share" action alongside all prior "email" actions (logs, oem files, etc).
- Fixed issue with brap not working on some Gen2 B58 / S58 vehicles.
- Fixed various app bugs / crashes.

### 5.24 — 2026-05-12

- Added advanced logging for new S58 00005C6414C808 ROM.
- Fixed issue with drivetrain (transmission) error codes affecting some Gen2 B58 ROMs with ReFlex.
- Fixed swipe gesture navigation issue when viewing logs on some devices.
- Fixed various app bugs / crashes.

### 5.23 — 2026-05-09

- Added MHD+ support for new S58 00005C6414C808 ROM.
- Added MHD Unlocker support for a few DME versions that were missing.
- Fixed various app bugs / crashes.

### 5.21 — 2026-04-01

This update from Apple will improve the functionality of this app. No new features are included.

- Added basic flashing / logging support for new S58 00005C6414C808 ROM (MHD+ support to follow).
- Fixed “no internet” issue affecting some customers.
- Fixed boost target issue on B48 custom tunes when using boost per gear.
- Fixed OEM launch control torque issue affecting some B58 / S58.
- Fixed various app bugs / crashes.
- Misc quality of life improvements.

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## More apps by MHD Tuning UG (haftungsbeschraenkt)

- [MHD Flasher N54](https://appshunter.io/ios/app/mhd-flasher-n54/id1445162440)
- [MHD N55 E-Series](https://appshunter.io/ios/app/mhd-n55-e-series/id1502611398)

All apps by MHD Tuning UG (haftungsbeschraenkt): https://appshunter.io/developer/1445162439

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*