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Unleash your Engine

MHD Flasher is the first Android handheld application to bring ECU tuning and monitoring to the BMW N54, N55 and S55 engine. The MHD Flasher reveals the immense margin of power BMW left on the table with the N54, N55 and S55 motor, while still retaining the sophistication of the original engine management program.

Easy to use

Connect any compatible Android device to your car using a standard K+Dcan cable along with an OTG USB cable. The first install takes only 20-35 minutes and any map or option change later just 2-4 minutes.

You can flash your ECU back to stock anytime, as often as you need to. No ECU backup is needed.

Keep an eye on the tuning

Monitor your engine behavior using a configurable gauge 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 30 monitors to a standard CSV file for later analysis. Track issues by reading the error codes and delete them once resolved.

Add big power

Install one of the MHD built-in OTS maps and add big power to your BMW. 

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

MHD Flasher App

User Reviews

Best way to tune your N54 hands down. Download app, purchase module and maps, flash desired map, and you're done.Bring that car back to life!

Roberto T.

Excellent tune! I've had it for about 5k miles now and no issues! Love the smoothness and the responsiveness. This is how it should have been from the factory.

Gregory G.

Excellent product!
Amazing pre-build in maps, nice tool, very flexible, very up to date, must have of any N54 tuner!

Filipe C.

Being bone stock, was looking for a little more as the N54 has so much potential. All I can say is WOW!! Grin from ear to ear after lighting up my back roads. That feeling of being thrown back in your seat is well... freaking bad ass. Great job guys. And the support and guidance they have given me has been Amazing.

Johnny L.

Been using the software close to two years now, great support and constant updates forever evolving with the platform.

Martin M.