Mine is playing up, went over a pot hole while driving and it went off, stopped the car at home the alarm stopped. locked the car using central locking, made 4 beeps (never done that before) then alarm went off, went for 30 seconds stopped for 5 seconds then went off again, this happened approx 10 times then stopped fully. Got back in the car after 20 mins, drove a short way to a mates, then it all happened again. It doesn't affect the immobilisor or ignition. I have now removed the siren, its genuine land rover (which explains alot) anyone else have the problem or any good with alarms or have a handbook??