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      07-19-2012, 03:28 PM   #265
ncnmra
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Drives: 2006 M Roadster
Join Date: Jul 2012
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Quote:
Originally Posted by inTgr8r View Post
An ECU 'tune' will overwrite anything in there.
It will overwrite the entire firmware, or the calibration parameters? Sorry if that's a dumb question...I'm used to products having upgradable firmware, but also calibration data sections (I'm an electrical engineer, and we design such products). Do these cars even have a "firmware"?

My impression was that the ECU tune changes the "settings" (ie: timing, fuel ratio, etc), but not the core "program". (That's why you have to send your ECU data to the tuner).

I talked to my local BMW dealership, and they suggested that the ECU does "not" have any factory updates....I'm not sure they understood my question, or if I'm phrasing it properly.
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