I have a 2005 Hyundai Tuscon. If we go out of town, or any time we don’t drive the Tuscan for three days or more we always come back to a dead battery. I mean really dead. I mean, get a new battery dead. Since 2005 when we bought the vehicle new, we’ve had nine—9—new batteries put in. The last one was a heavy duty battery recommended by the dealer.
This problem started after the dealer replaced the OEM radio. We’ve had multiple checks done on the engine to find out where the (battery) draw is coming from. I researched and found a Hyundai Technical Service Bulletin saying that the problem is from a defective stereo. But my dealer says they can’t locate the problem.
We’ve also had the battery posts cleaned and other things done.
The vehicle runs fine and has had few problems except for this nagging battery problem.
Thoughts, ideas, offers (to purchase) appreciated.