My boot won't open on my Nissan Micra S - the doors are okay. It all started with the boot opening by itself as i was driving and now it won't open at all. Please help

could the wires be damaged in the rubber boot from tailgate to the bodywork

hi there.
this youtube video might help you out.
NISSAN MICAR k12 WON START OR TURN OVER RANDOM PROBLEMS WITH IGNITION
or this google link.
Nissan micra k12 won start Google Search

i'd say 2 completely different issues,did key work when you bought vehicle,i'd say ones a replacement and they may not have coded it to immobiliser,horn may be horn itself ,but often the moving parts behind steering wheel fail,have you checked the fuse?the relay can often fail to

I just opened the key and put loads of switch cleaner (you can get it for a few quid from Maplin's or similar). Good as a workaround, but presumably not a long term solution.

Best bet is to join the nissan micra forum its free to join.And you witl find hep for all your problems in the future.Have you checked all fuses first ?

something jammed between door and body maybe?

keys need to be programmed using a diagnostic computer and the keys need to be in good working order.
There is an over ride manual opening on the passenger door (remove plastic part of door handle).

There should be a little plastic cover on the passenger door handle with an emblam of a key on it,underneaththis you should find the keyhole