My car alarm keeps going off for no reason. What can be the problem?

When that happens, most people tend to place blame on the shock sensor or the alarm.If it happens right after installation, it’s because extra sensors where spliced together without placing diodes in between the connections. Having diodes between sensor connections will help prevent feedbacks from other sensors thus eliminating false alarms.Otherwise, it’s always going to be the door pin switch of the car itself. Water or moisture has seeped into the door pin switch or the door pin switch is wet or corroded. This usually happens in wet or humid weather or after it has rain or a recent car wash. Rubber seals on your doors may have dried out or been damaged allowing water or moisture to seep in.Check the door pin switches & rubber seals of each door and replace if necessary.Replacing the alarm will make no difference. It is not an alarm problem, it is a car part problem.