I was able to disconnect the passeger side O2 sensor just fine but I cannot get the driver side connector to come off the metal mounting plate to save my life. It doesn't help that it is located in an impossibly narrow location. I am using a long tool to flip the connector tab up while using another tool to pull up on it....nothing. Any ideas?

 

There is a video on the AB website that might help. They show how they disconnect the O2 you are having a problem with at around 4:40 in the video. I hope this helps.

Oxygen Sensor Kit - Land Rover Discovery 2

 

i had to use two flat head screw drivers. used one to push locking clip. and while i had that lock depressed. I used the other screw driver to push up on the botton of the connectors.

its a pain to get the drivers side.

 

Thanks for the help I managed to get it off. Corrosion on that plate....unreal.