I think I recall that the EU version used a wide band front, rather than the WRAF here in the states. If thats the case, you can get away with what your running with little or no problems. However the later sh7059 based system is MUCH more adaptive, and does not play well with piggybacks
Now we meet somewhere. I didn't know that the US version has different setup. Mine is with the "wideband" front O2
The mazda 2 in EU, JDM and other markets except the US is on sale from Q3 of 2007