Hi DL, you can get one from your local Triumph dealer, as I recall about £20, I have also seen them for sale on e bay. There is a fault on some S4 alarm/immobiliser that suddenly shut down causing the bike to stop, if you go on the datatool website and type in the serial number it will tell you if it is one with the recall. If it is ring the company based in Chorley, they will arrange recovery of your bike and replace the alarm all free of charge, and deliver the bike back to you. Hope this helps.