Thread: New BMW ECM software update Mx40i - DOWNTUNE?
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      02-06-2019, 06:55 PM   #11
Ron Jeffries
Old Member. Old in general, actually.
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Drives: 2018 M240i xDrive convertible
Join Date: Feb 2013
Location: Michigan

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I got the update. My exhaust sound has not changed. It never did pop and burble as nicely as my 135is. I'd code more noise if I could.

It did clear all my special codes and I had to do them over.
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