MMI Updating - Remap issues

[FinnMc1]

Hi Guys,
Going to update my MMI software to 5570 but heard that it can wipe any engine ECU remap you might have! Can anyone confirm if this is true or not. I find it hard to believe but want to make sure!

Cheers,
Finn

 

[NHN]

I always find it wise, unless told otherwise, when updating firmware to either have engine running or a battery regulator attached, to maintain power levels as some systems shut down & send comms messages that can interfere with update processes, I don't know this update specifically, but does it have 3 discs, as I seem to recall 1 update takes a while & some people have had to login & re-enable some systems, as for remaps, I don't know any mmi update that rewrites the engine map.

 

[FinnMc1]

Ye ive read you need to leave it on charge or running. Will have to source a car charger from somewhere I guess. Thanks for the info. I thought it sounded crazy that it would rewrite the ECU!
Hopefully it all goes smoothly. Just downloading the updates at the moment,
Cheers

 

[NHN]

Be very careful using downloads for mmi, as if they're corrupted you could end up with a bigger expensive problem, verify the data being used.

 

[FinnMc1]

How can I verify it? Ive got it off a GPS Underground site and other guys on there sound as if its worked for them. Thought it would refuse it if it was corrupt coding etc

 

[NHN]

That's what I meant, verify the download via other users.

 

[FinnMc1]

Ah ye ok will do, cheers