
The fact is that most people who say the above either haven’t extensively driven SMG cars, haven’t driven a CSL flashed one, and/or are on the SMG hate bandwagon because nobody wants to admit the SMG (despite its many faults) is not that bad (ask me how I know). “OMG, how can you like the SMG? (Insert barf emoji’s, thumbs down emoji’s, etc, etc)”

Since I was having the rod bearings and rear subframe reinforced at EAS, I thought I may as well have the tune done to make the transmission more tolerable because at this point it I wanted it out, and I knew it will be awhile before I do the swap.Īfter getting my car back from the shop, some of my complaints on the factory SMG programming were either resolved or at least minimized to a point where manual swapping is now almost at the bottom of my list of things I want to do to my M3.

I did have some experience with the SMG before, but really, I bought it with the intention of manual swapping it ASAP. Recently, I purchased a Mystic Blue 2004 M3 with the now infamous SMG transmission. Okay, so while that isn’t the actual end of this post, it pretty much sums up the fact that every SMG M3 should have this tune because it is worth the $95 (at the time I got it done) that my favorite shop, European Auto Source(EAS), charged me. The CSL 255 flash for the SMG improves the SMG to where it actually is a reasonably enjoyable transmission.

The E46 M3 with the SMG is not *as bad* as people make it out to be.
