only available with the V6 engine on the LE, XLE and Limited model trims. Described by AOL Autos as slipping a sports car in a minivan, chief engineer Kazuo Mori (an avid autocrosser) reportedly had to overcome opposition to get the SE equipment package included in the line-up. The previous 3.5-liter 2GR-FE continues, now coupled to a six-speed transmission, but for the first time the Sienna offers a four-cylinder engine, the 1AR-FE. This is the first time Toyota has offered a four-cylinder engine in a North American minivan since discontinuation of the Estima/Previa in late 1997. An electric power steering (EPS) system replaces the previous hydraulic power steering system. Toyota continued to offer all-wheel drive in the Sienna. As GM discontinued its AWD minivans after the 2006 model year, it was the only North American minivan with an available AWD drivetrain until the 2021 Chrysler Pacifica went on sale in late 2020. Toyota published EPA-estimated mileage figures of city / highway for models powered by the 4-cylinder engine, city / highway for 2WD V6 models, and city / highway for AWD models. An optional tow package for V6 models is rated to tow . The front dashboard features a "swoop" wood trim, inspired by the Toyota Venza and Lexus RX, that gives front seat occupants a "60/60" split whether in the driver or passenger seat. New features included an optional sliding second row with "Lounge Seating" recliner style chairs, a feature previously seen on the Lexus LS, and Toyota's keyless Smart Key System with push-button start. The rear seat entertainment option now uses a LCD screen which operates in two view modes, a single 16:9-ratio widescreen or two separate 4:3-ratio split screens with separate wireless headphones. For safety the back-up camera comes with a new 180° panoramic view. Other new options include a Pre-Collision System (PCS) as well as an automatic highbeam dimmer, Safety Connect and a more advanced stability control system known as Vehicle Integrated Dynamics Management. A driver's knee airbag is now standard as well. When the second row seats are removed, the bottom of the second row seats, which is similar to a rack, remains attached to the van floor. This means that with second row seats removed, the floor is not flat. Toyota is the first automaker to offer a factory installed auto-access seat for disabled people. The one-touch rotating, power ascending/descending lift-up seat can lower