I have had a simular problem, constant false alarms and i have sort of fixed it. I hope this is of help. Between the front doors and the back doors on either side of the car is sensors inside the plastic trim, what i did was prise it away enough to get behind and it was quite easy to do, then i pulled the plug on the sensors. The immobilisor is still ok and the alarm still works if the car doors are opened or ignition is tampered with. The only facility you lose is the motion detection within the car, for me thats ok im not bothered but if your problem is the same then i suggest try it and if you want replace the sensors inside the car, personally im going to leave them disconnected, after all who will know. Hope this helps Tony
Tony Hicks, September 2008