How timely. I logged on this morning just to post a new thread about how to replace the motors without going through the full landrover dash removal or the complex one suggested on this site. I have a spare working motor by the way!
Basically, the passengers one is really easy. Remove/lower glove box. With very small screwdriver reach around heater duct and you can JUST get to screw to undo the lower one. Screw above is reached with a very long but small screwdriver (I made one) through a tiny hole at the top on the side of the glove box frame. Shine a small light through and you can just get to the screw. Once both are undone, about 20 mins, remove the glove box lock and with a coat hanger pull wire through the lock hole!!!

Splice new motor in, very easy to do. (Remember to feed wire for new motor from within the dash or you have a motor wired in in the passenger compartment!!!!! I would know!!!! One wire is not used, you will see this on the multiplug of the new motor. I soldered to splice as connectors would not go through lock hole!Then used heat shrink to protect.
Replace as above, but only put lower screw on as top was too fiddly! Really easy, I was well chuffed!
Please note both a landrover garage and a specialist told me that once replaced it would not work and £50 testbook required to calibrate! RUBBISH. Test book light on dash has gone out and works a treat! Trust me... a few bleeding knuckles but very easy! If near Oxford give us a shout for help.
I had to buy the entire heater unit from a breakers yard just to get one servo so have loads of spares, except the passengers side servo.