Wideband

I run a depo wideband in my sti. It come with a 4.9 lsu which was super responsive/heated up quick but sensors did not last more then 500 miles. Car runs 14.7 cruise and 10.8 wot. Ended up using a 4.2 sensor and rewiring it and has worked flawless.

Sorry, but not up with technology yet, what is a 4.9Isu and a 4.2 sensor. What is the 4.2 sensor from and what did you have to do to make it work with the wiring?? Thank You!