About 6 months ago my 2011 Optima alarm started going off randomly in the night, a couple times a week. It was annoying to me and the neighbors. I park on my driveway and have nothing of value in the car. Our neighborhood is a good one.
When I took it to the dealership for its 15k mileage checkup they shrugged their shoulders, said they had no idea. The next time I brought it in I reported it happening more frequently and even during the day. I also reported not hearing the chirping lock sound anymore, but that I could hear the locks engage when hitting the key fob control. They looked and looked and said that a sensor in the engine compartment had a bumper missing and they replaced it and it worked at chirping again (for a while). They had no idea on the random alarm.
My car chirps only occasionally when being locked, and it still goes off at all hours of the day. Randomly. There seems to be no conceivable pattern. Except that it goes off least when parked in my garage. Lately I have taken to leaving the car doors unlocked in my driveway so I don't have to sleep with the keys on my nightstand.
I love my Optima but am seriously considering having the horn disconnected. And no. Its not a battery issue. We put a new battery in. The problem continued immediately.
This is incredibly frustrating. What can I do?