VMAXR is a compact Windows utility designed to adjust vehicle maximum speed limiter calibration values inside ECU read files. It works on saved tuning files rather than connecting to a vehicle directly, which makes it useful for controlled workshop workflows where file-based editing is required.


Summary Highlights

• Opens ECU read files and provides a guided workflow for speed limiter value changes
• Vehicle Make and Vehicle ECU selectors to help match supported ECU families
• Displays the current speed limiter value and allows entry of a new target value
• MPH and KPH selection for consistent unit handling during editing
• Creates a clear on-screen summary of the selected make, ECU and limiter changes
• Saves an updated output file after changes are applied

Package contents

• VMAXR.exe
• vmaxr.txt

Compatibility notes
This tool is intended for file-based editing and the result depends on ECU family, software version, and calibration layout. Availability varies by vehicle and firmware. Always keep an untouched backup of the original read file and verify changes with appropriate calibration checks.

Supported makes and ECU families listed in the ECU Support section:

• AUDI-SEAT-SKODA-VOLKSWAGEN: BOSCH - EDC16U1, BOSCH - EDC16U31, BOSCH - EDC16U34, BOSCH - EDC16CP34, BOSCH - EDC17C46, BOSCH - EDC15C54, BOSCH - EDC17CP04, BOSCH - EDC17CP14, BOSCH - EDC17CP20, BOSCH - ME7.5
• ALFA: BOSCH - EDC16C39
• BMW: BOSCH - EDC15C4, BOSCH - EDC16C31, BOSCH - EDC17C41, BOSCH - EDC17C76, BOSCH - EDC17CP02, SIEMENS - MSS60
• CITREON-PEUGEOT: BOSCH - EDC17CP52
• FIAT: BOSCH - EDC16C39, MARELLI - MJ8DF
• HYUNDAI-KIA: BOSCH - EDC16C39
• OPEL (VAUXHALL): BOSCH - EDC16C9, BOSCH - EDC16C39, BOSCH - EDC17C59, BOSCH - ME1.5.5, BOSCH - ME7.6.2
• SAAB: BOSCH - EDC16C9, BOSCH - EDC16C39

Basic usage

• Extract the folder and run VMAXR.exe with administrator rights if required
• Click Open and select the ECU read file you want to review
• Choose Vehicle Make and Vehicle ECU to match the file you loaded
• Check the current limiter value, select MPH or KPH, then enter the new target value
• Click Save to write the updated file and review the Summary panel for confirmation

Operating systems

• Windows 7 SP1, Windows 8.1, Windows 10, Windows 11
• x86 and x64 editions supported

Minimum system requirements

• CPU: Dual-core 1.6 GHz or higher
• RAM: 2 GB minimum, 4 GB recommended
• Storage: 50 MB free space plus space for your read files and backups
• Network: Not required for normal offline use
• Permissions: Local administrator rights may be required depending on your system policy

Disclaimer
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User Responsibility. Software is provided for educational and evaluation purposes only. You use it at your own risk. Authors of the post and forum administration are not liable for any damage.