A security locker is for securing articles externally on a vehicle. The locker comprises a locker having at least one opening facing the exterior of the vehicle when the locker is fitted thereto, wherein the opening provides access to the interior of the locker. A door is moveable between an open position in which the interior of the locker is accessible through the opening from outside of the vehicle when the locker is fitted thereto, and a closed position in which the locker is inaccessible. The locker includes locking device that, when activated, locks the door in a closed position to prevent unauthorized access to the locker, and when deactivated unlocks the door to enable access to the locker. An input device is operatively connected to the locking device, wherein the locking device is accessible from outside the locked vehicle and it deactivates the locking device when an identifiable code is entered to thereby allow keyless entry to the locker. An interface connects the input device to a security system of the vehicle such that entry of the identifiable code into the input device results in activation or deactivation of the security system.