Door locks interchangeable?

[kungfu]

Hi, the drivers side door lock is really touchy and some days take 10-15 attempts to unlock (non central locking btw) and some days i can open it by just putting the tip of the key in and turning. meanwhile the passenger side is spot on and opens perfect every time... so is it possible to just swap lock cylinders from ns to os or are they different?

cheers for any help guys