alarm problem with my saxo vtr 1.6i

  1. #1
    had a saxo from a garage the other week, nice car and really nice to drive etc but problem im having is my alarm.. its all key lock no immobilizer or thob, so when you turn the engine off and sit in the car it auto sets and then obviously goes off after a few minutes. and if you get out the car, and just shut the door with it still being open, it sets auto again so when you open the door it goes off.. is this a manufacturer fitted alarm or has someone put this in themselves? it does have black sensors above the door just along the windscreen so im not sure?