I just picked up a nice 2002 Acura TL Type S as my daily. Love the car... but tonight we went out to eat and I locked the car by key, because I noticed the key fob wasn't working. I assume the battery needs replaced. After we were done eating I unlocked the car and went on our way to Target. Did the same thing however, after I unlocked it and started the car the alarm went off. I'm sitting there no idea what to do. Eventually it went off. I was driving down the road and decided to hit the unlock to unlock all the doors and the alarm went off again. Car still runs fine and no issues. I get home and shut the car off and as soon as I open the car door it goes off. Had to disconnect the battery just so I didn't have my neighbors complaining. Anyone have a clue as to what it might be? I am going to take it to a dealership this week, but hate having to drive it down the road as the alarm is going off until it stops.