Ok I know u have to use the vx harness. Btw I have eg 4 vx hb. But since I'm using the harness why can't u just use the 5 wire o2 instead of rewiring for the 4 wire. Is it cause the p28 ecu only reads a 4 wire or what? The reAson I'm asking is cause my d16z6 is cracked . I just got it itw not even in my car. But I have a after market one to replace it but I have tried fukin everything to get the damn o2sensor out!!!