Lower than low. In the hierarchy of California Air Resources Board (CARB) ratings, an Ultra Low Emission Vehicle (ULEV) is one step cleaner than a baseline Low Emission Vehicle II (LEV-II). A ULEV vehicle will emit roughly 50 percent less carbon monoxide and hydrocarbons than an LEV-II-rated car, pickup truck or SUV.

Another term for air dam, this body piece helps reduce wind resistance and lift by directing airflow around the front and sides of the vehicle. By reducing underbody turbulence, these spoilers may help improve fuel economy and highway stability control.

A chassis design where the structural strength is built into the body of the vehicle, eliminating the need for a separate frame. By strategically reinforcing the body, it becomes a type of self-supporting hard shell into which the engine and suspension can be mounted–and the passenger compartment is virtually surrounded by framework. Unibody vehicles tend to be much lighter than vehicles of a comparable size built with a separate ladder frame.

Part of the electronic control and intelligence function of a Toyota automatic transmission that helps the transmission automatically select and hold the best gear for climbing and descending hills.

Called High Solar Energy-Absorbing (HSEA) glass in Toyota vehicles, this automotive glass was specifically designed to help reduce or stop the ultraviolet and infrared rays that penetrate the windshield, door windows, quarter glass, rear window and sunroof (if equipped). Ultraviolet and infrared rays cause sunburn, increase the temperature inside the vehicle, and can also damage interior materials. UV reduction glass can reduce ultraviolet and infrared rays by as much as 70 to 100 percent.