I purchased some generic aftermarket O2 sensors for my 2002 Land Rover Discovery 2, which were significantly cheaper than the "official" Land Rover replacement parts.
Unfortunately after installation, I discovered that the front sensors were not registering any voltage according to my OBDII scanner. I followed this very good answer and determined that the polarity of the sensor pins was reversed in the new part as compared to the original parts.
So it seems that these new sensors will probably work, but I just need to swap the two sensor pins in the connector. Is it possible to do this without splicing wires?