The redesigned 2021 Toyota Sienna is built on the company's TNGA-K platform and features a standard hybrid powertrain that will give it a Toyota-estimated 57 percent improvement in combined fuel economy: 33 mpg. Along with exterior styling that brings it more in line with Toyota's crossover lineup and new driver-assist and safety features, the 2021 Sienna receives upgraded interior amenities, including a much-improved infotainment system and recliner-like second-row seating. Here's a roundup of snippets of initial Sienna reviews from the automotive media.