Hi newbie on here - been on a few times but now need to post. I have a 99 V plate sportage 2.0sx. It has a fault on the central locking in that it rather often now refuses to lock when I first get out of the car. Had the drivers door switch etc checked and I've been told it's the alarm/ecu/timer control?? which is faulty as if I leave it to stand a few minutes it locks straight away. I have two questions one are these prone to "dry joints" on the circuit board and if it can't be fixed is it coded to the car or can I simply buy a second hand one and have my fella fit it for me?