I just bought an 07 Mazda 3i with the 2.0 motor. I saw that it had an Injen cold air intake when I bought it. Taking a closer look at it tonight, I noticed that the MAF sensor has been messed with previously. The wires to the MAF are all white, and they have been marked with numbers 1-4, indicating that the previous owner spliced these wires into the MAF. The MAF has "TOYOTA" marked on the top of it. I searched, but couldn't find anything that may explain this. Does anybody know why they did this?