Ok, see now I'm shitty...
The O2 sensor fits a treat, then when it came time to wire it up... the 2 wiring diagrams are different, and dont co-inside with the wiring diagram supplied with the new sensor. If anyone knows what the colors go to on the BT20V loom... please I need help!!!
Kev, do you have scans of the two diagrams? If you do, can you post up the relevent bits for the o2 sensor and I will see if i can make sence of it.