The most popular-selling hybrid model on the market today, the Toyota Prius is now entering its third-generation release with the 2010 model (Photo 1). Although it shares many of the same characteristics of the second-generation Prius, there are a few differences, most notably the option of purchasing the solar panel feature that powers a ventilation system to keep a closed vehicle cooler on a warm sunny day. Response concerns surrounding this new feature are addressed in this article as well.