hay my central locking on me pass.side door kind-off went weird on me the other day, it locks an unlocks, but it hell takes it time, an by clickin or unlockin hell loud...

is the central lockin unit dying?
i took a lok @ it, an gav it a bit of a spray wit wd40, but no good
its the same, so i disconnected it @ the harness...

anyone got any tips on how 2 fix this problem?
an if i need a new unit can i just buy any central locking unit an replace it?
but how the hell do u get it out? lol

well anything on this would b great....
thanks