When I bought my Disco II, the idiot I bought it from said it needed a new BCM, and had one to install. It was the wrong kind, but also it wasn't needed. The wipers didn't work, front or back, and the seats wouldn't heat either. no lights, no heat. nothing. After looking at some wiring diagrams, I say that the AUX relay in the engine bay was connected to the whole thing. Also, the AUX relay was involved. The Aux relay was bad and the fuse was blown. Too easy to fix! I wanted to find the spec on the relay for it, but I couldn't find it, so I tried a simple SPST relay from Autozone. It was $6 and worked with no problems. Now everything I listed works. Seats both heat up right away, too. I love that! To make it fit under the fuse box hood, Ihad to break off the mounting tab of the relay. With a pair of pliers, it broke off pretty easily.

Novita RL44 Relay
SPST 40A Relay

Here's a picture of it installed:

 

Nice! Now flush that dexcool for some green coolant

 

Cool.
I'm amazed every time I read that kind of issues/fixes, the LR people (here, at least) go right to the "major", expensive solutions and do not check the basics...
It seems that many of those issues are pretty simple to fix/avoid.

 

Any chance either of y'all have a picture of your car-side connector to the front driver's side O2 sensor and the colored wires going to it?