Originally Posted by EVOHUNTER

This is wrong, I hear this a lot and its a myth.

Back in the day when there was resistor type 02 sensors, they would get damaged from impact wrench's. This day and age they're a heater type 02's. They still have a resistor, but completely different style.

I own a exhaust/mech shop, we never remove the 02's, ever.

Inless there a resistor type o2.