MHD vs BM3

[WordOnRoad]

Originally Posted by AlmondJayRoM3

I can confirm that Bootmod3 saves your stock tune. Bootmod3 stock and lock reverts to the original cal id/cvn. BM3 also worked with me when I had to take my F80 in for the 4G/LTE comma upgrade which would result in a new istep. They reset my account prior to reinstalling my tune so that it would save the new stock programming. Verified CALID/CVN prior to tune. Then tested going back to stock/lock and calid/cvn was just as it was. Did all this because I know I’ll be moving to Cali in a year.

Can you share a screenshot of this? What did you use to read the values?

[AlmondJayRoM3]

Originally Posted by WordOnRoad

Can you share a screenshot of this? What did you use to read the values?

I used ISTA. Not going to flash/lock just to prove this but since ISTA saves diagnostic processes performed, I dug up the screen shot from when I checked the CALID/CVN back in August 2021. Note the date of the screen shot showing matching CALID/CVN as 8/27/2021. Then look at the second screen shot in BM3 showing an activation date of 8/26/2021 after they reset my account.

[chmura]

Where in ISTA can you get your CAL ID and CVN number at? I want to check mine and take a screen shot before I tune.

[AlmondJayRoM3]

Originally Posted by chmura

Where in ISTA can you get your CAL ID and CVN number at? I want to check mine and take a screen shot before I tune.

Vehicle Management -> service functions -> power train-> obd scan tool

[chmura]

Originally Posted by AlmondJayRoM3

Vehicle Management -> service functions -> power train-> obd scan tool

I’ll give it a try. Thank you!

[chmura]

Originally Posted by AlmondJayRoM3

Vehicle Management -> service functions -> power train-> obd scan tool

Thank you. It worked. I took a screen shot of the original numbers. Im stock so I will keep this for reference!

[Laggrider]

I just bought a used car with an MHD tune. I bought an MHD WiFi dongle, is this compatible with BM3? Can I still flash my car to BM3 if I don’t have stick tune?

Thanks!

[FrankMstein]

Originally Posted by Laggrider

I just bought a used car with an MHD tune. I bought an MHD WiFi dongle, is this compatible with BM3? Can I still flash my car to BM3 if I don’t have stick tune?

Thanks!

The dongle is compatible. I don't know what a stick tune is. I would keep the MHD tune creds. Return the car to 0 and re-lock first to be safe. Then tune with BM3.