Toyota Repair: 2007 Sienna, coolant leak, service bulletins

Question
I have been noticing a sweet smell which is entering the cabin.  It smells to me like coolant.  When I opened the hood the smell was especially strong around the battery.

Are there any known issues with this model? What could I look for? Maybe a hose which is loose? The battery?

Answer
I recommend that you take it to the toyota dealer because it's probably still covered under the warranty, yes there seems to be coolant leak, the dealer should pressure test the cooling system to fine the leak and repair it, don't drive it too much because overheating and engine damage may result, call your dealer and tell them you need to bring it in for this asap. No there are no known issues or recalls or service bulletins at this time.