You have selected the 4 cell Conlog/Logic key fob battery pack type 4/393 (GP4/393).This alarm was sold as a retro fit alarm through dealers and also fitted by VAG to some of their VW, Audi, Skoda and Seat vehicles. To make sure you've chose the correct battery simply count the number of cells (mini batteries) in the clear sleeve. Be aware there is a 5 cell version with thinner cells called 5/392. If yours has 4 cells, you've got the right battery.