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      10-11-2013, 06:33 PM   #22

Drives: 2013 F10 M5
Join Date: Apr 2009
Location: Out and About

iTrader: (34)

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2013 BMW M5  [0.00]
Originally Posted by WhiteFury View Post
I just got my DME updated at the dealership, and my exhaust got quieter. Yesterday I had my secondary cats cut off and I love the way it sounds, now it sounds like crap.

I do I fix this, or get rid of this update?

Also idle isn't as smooth and my sputter has returned.

I am providing pictures of my update to see what software version I have and if you guys can tell me anything about it.

ISTA/P version - 50.4.002

Integration level - E89X-13-07-503
I'd bring the issue up with your dealer.

They will not be unable to remove the software update, their systems don't allow anything like that. You'd have to find a aftermarket coder to reflash the DME with the original software.