That would be my concern. I was told at the dealer when I got my 3, that I should look into getting a chip for the 2.3. Now, this salesman was not the most intelligent but he did tell me that someone had already done so by putting a Mazda6 chip on his Mazda3. I bet it is coming, but it may already be here.black3s said:And wouldn't you not want to use a chip from the 6? Because I thought the 6 didn't have the variable valve timing. I don't know if the chip would be affected by this or not.