I have a 2011 TSX with Tech Package and sometimes when I get into my car there is the the sound of an internal "alarm", as a result either the battery has significantly drained or the car will not start. I have ensured I am not leaving the lamps on--I just can't figure it out??? Again this "alarm" like sound can only be heard from inside the cabin not near the car. I had the battery checked out and it was said to be OK as well as my alternator.

Anyone suspect what it might be causing this?

 

Welcome to the forums.

This thread has been moved to the model specific forum for better response.

 

Sounds like some sort of aftermarket accessory. Do you have anything non-factory installed? What about phone chargers? Any OBDII gadget plugged in the port?

 

I may have a iPhone charge plugged in, but the phone of course is not there. I have noticed that it I don't press the button on the FOB and hear the "beep" sound it typically will happen the next day.