 Purchased 2011 Avalon in May 2010. Constant dead battery's. Cannot leave car over 4 days without jumping it. Not informed this is constant problem with this vehicle as it appears it is being hidden. Have much documentation but they will not put their statements in writing. Sticker price was $47,000 and it started just 10 days after taking possession of vehicles. Beware of Toyota Avalons! All back up documentation available . Toyota is ignoring this problem , It will not go away!