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Old 01-20-2012, 03:16 PM   #21
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Join Date: Apr 2010
Location: Toronto
Posts: 6,882
My Ride: 2004 M3, 2001 325i
Originally Posted by DougL3NC View Post
What does the term "Catalyzer Preparation" mean?

Looking at the DME's available for my 00 323, there is the standard flash (Euro 3 equivalent) and the ones marked EU2 are for lower power output or low compression motors.

The one is marked "Catalyzer Preparation=Yes". Is that the cat-less EU2 tune?
You don't want any flashes marked for low power/low compression.

I know my tune number, there are at least 3 that can be used on my 325. If you aren't sure, don't flash.

For a MS42 323, you may want to consider 12141430440

For vehicles with:
EU2 exhaust emissions standard (S168A) = Yes
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