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you guys are totally miscontrued with your info, that I'm sure doesn't sound firsthand. I HAVE USED MECHANICAL ANTI-FOULERS ON MY E90 M3 and THEY WORK!!!
that being said, the BMS fix will def work as it is a electrical patch, 02 simulator.
But regardless of the vehicle, a mechanical o2 extender is just that, mechanical. It works by pulling the 02 sensor just far our enough of the normal path of exhaust flow, therbly creating a false reading (as it is now only pulling a portion of the original measured exhaust).
For those who are skeptics, buy the uber expensive Akra Delet-R..
For those mechanically inclined, try the 02 extenders, they work you just need the correct lenght to alter the reading to not draw a CEL; (they can be lenghtened or shortened)
***my sig pic is my old e46, I currently own an e90 m3 with lots of work done to it, all performed by me. My hobby has been building/working on cars since I was very little, and have owned over @ 25cars.
SO YES< FIRST HAND EXPERIENCE; THESE WORK FOR ME!!
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