My offside passenger door won't lock when I have locked the car with the central locking. All others, including boot are fine.

If I try it when 'locked' it opens and the alarm goes off.

Is this a fuse or a faulty mechanism?

Is it easy to fix?

I seem to remember a couple of threads recently along similar lines. Try the search facility, you'll probably find some useful information.

My dealer fixed mine, but I believe it's a door card off And replace mechanism job, as suggested search will bring more info up as I think someone did a DIY job on it Former Mod/Member, with the most post & Chicken George Arch nemesis

http://www.freel2.com/forum/topic16492.html? p****d off with a Digital Keyboard Warrior

It sounds like the latch, mine was similar, anouying as mine was just two months out of warranty. Dealer will charge around 200 quid. Mike@LR got me some goodwill on mine. Some people have fixed it themselves, I didn't feel confident doing it myself as you have to take out the window winder mechanism to get the latch out. Black MY2013 SD4 GS Auto, Wood Company Armrest, Freel2 sticker.
Gone MY2010 Freelander 2 Manual TD4.e S, Alaska White.

I have a similar problem on my 08 reg FL2 in that if I lock the car then the passenger side rear door will still open and set off the alarm. However if I lock the car twice ie I press the button twice then all doors are locked ok. Similarly for unlocking, I have to press the button a second time (actually a third time given the way that landrovers unlock) to get that door open.