97 Discovery. Anyone have any tips/advice for unplugging/replugging the harness for the passenger side pre-cat oxygen sensor?

 

Why are you wanting to do this, are you replacing your 02's, how many miles on them and do you have a fault code?

 

The plug is on top of the bell housing right at the back of the engine. You may be able to reach down from the top of the engine to unplug it. It's a lot easier to access with the heads removed from the engine but I wouldn't advice going that route.

 

121,000 miles with original O2 sensors. P0130. Replaced drivers side front no problems. Replaced passenger side front in y pipe, but haven't tried to get to get at the harness yet since it's up behind/under coils. I'm just trying to see if anyone has any advice about getting at the harness.