I'm needing to replace my Oxygen sensor (O2S) for the upstream bank number 1. and i've looked at th how to, and also went to TeamFordParts.com to get ht sensor, but there are 3 options on the sensor and i want to make sure that i'm ordering correct one.
the choices are as follows:
Square connector, (TFP's guess)
(Green Connector,
Round Grey connector
this is on a 99 2.5L atx
that's all
-mark