How do I change the O2 sensor's on a 2002 Kia Sportage?

Answer 1

first locate the 2 sensors, then spray which one your trying to take out with wd-40 or liquid wrench where the o2 sensor screws into the pipe. Let it sit say ten minutes, then disconnect the the electrical connector end before unscrewing the sensor. Finding the right size wrench can be challenging sometimes,lately you want metric. When you go to install the new o2 sensor make sure you use a quality o2 sensor, like borg-warner, and really make sure you coat the threads with anti-seize compound before screwing back in and then reconnect harness.