The Toyota Sienna is a minivan manufactured and marketed by Toyota primarily for the North American market. It is named for the Italian city of Siena, in the region of Tuscany. It replaced the first generation Previa van in 1997 with a more conventional front-wheel drive layout and shares a heavily revised platform with the Camry. Both the Previa and original Sienna were smaller than the other minivans they competed against, but a redesign in 2003 increased the dimensions to match those of its competitors.

The Toyota New Global Architecture are modular automobile platforms that underpin various Toyota and Lexus models starting with the fourth-generation Prius in late 2015. TNGA platforms accommodate different vehicle sizes and also front-, rear- and all-wheel drive configurations.