Abstract: The invention relates to a driveshaft lock (10) and to a method (50) of retrofitting the driveshaft lock to a vehicle. The driveshaft lock (10) includes a rotor (17) which defines a star-shaped central aperture (20) which is configured to receive a non-circular, peripheral profile of a drive flange (13) therethrough such that the rotor (17) is configured to piggyback on the drive flange (13). The lock (10) includes a locking member (21) which is configured selectively to engage the rotor (17) in order to lock the rotor in position and prevent angular displacement thereof. Amongst other steps, the method (50) includes aligning the aperture (20) of the rotor with the profile of the drive flange, passing the rotor over the drive flange, rotating the rotor relative to the drive flange, and securing the rotor to the drive flange for rotation together with the drive flange, piggyback-style.