The 2021 Toyota Sienna is the fourth generation of Toyota’s North American minivan and the most substantial redesign in the nameplate’s history. Toyota introduced it on May 18, 2020, and the new model reached dealerships that fall. Every 2021 Sienna uses a hybrid powertrain, replacing the 3.5-liter V6 of the third-generation van. This guide covers the interior, the release timeline, and the changes that define the 2021 model.
Release Date and Model Timeline
Toyota unveiled the fourth-generation Sienna on May 18, 2020, and production began in September 2020 at the company’s Princeton, Indiana plant. The van went on sale in the United States in late 2020 as a 2021 model. It replaced the third-generation Sienna, which had been sold in the U.S. since February 2010 and had not been fully redesigned in a decade. The fourth generation was the first Sienna built on Toyota’s TNGA-K platform, a structure it shares with several larger Toyota crossovers and MPVs, and it was the first Sienna offered with a hybrid-only lineup.
What the Fourth Generation Changed
The switch to the TNGA-K platform brought a more rigid body and a trailing-arm multi-link rear suspension, changes Toyota credits with improving ride comfort and quietness. The biggest mechanical change was the deletion of the previous 3.5-liter V6, replaced by the standard hybrid system. Toyota estimates the new van is quieter in the frequencies where conversation happens, and the hybrid layout adds low-speed electric torque. The trade-off is straight-line acceleration: Car and Driver measured the hybrid Sienna as nearly a second slower to 60 mph than the 296-horsepower V6 model it replaced.
Interior Seating and Flexibility
The 2021 Sienna is offered in seven- and eight-seat layouts. Eight-seat versions on the LE and some XLE models pair two captain’s chairs with a stowable middle seat in the second row. Seven-seat versions — the XSE, Limited, and Platinum, plus some XLE models — use what Toyota calls Super Long Slide second-row captain’s chairs that travel through 25 inches for extra legroom, letting the seats slide far back for adults or forward to open cargo space. Heated second-row seats with ottomans are available on front-wheel-drive Limited and Platinum models.
Toyota designed a Bridge Console that sits high between the driver and front passenger and links the instrument panel to the center armrest. The layout places the shifter, cupholders, an available wireless charger, and storage bins within reach, with a large open tray beneath for bags or purses. Toyota says the cabin provides up to 18 cupholders across the three rows, and the third row folds flat into the floor to open up cargo space.
Cabin Design and Technology
The instrument panel is built of bold horizontal layers to create a wide, spacious feel. Available features include a 10-inch color head-up display, a digital rear-view mirror that switches to a camera view when the cabin is full, a 12-speaker JBL audio system, seven USB ports, four-zone climate control, kick-open and close sliding side doors and rear gate, and a 1080p rear-seat entertainment system. Higher trims add a power tilt and telescoping steering column with a heated wheel, and Toyota also offers a 1,500-watt inverter with a 120-volt outlet for powering camping gear.
Exterior and Dimensions
The fourth-generation Sienna is 203.7 to 204.1 inches long, 78.5 inches wide, and 68.5 to 70 inches tall depending on roof rails, riding on a 120.5-inch wheelbase. Toyota drew the front-end theme from the Japanese Shinkansen bullet train, pairing slim LED headlights with a large lower grille, and added a rear pillar angled forward for a less boxy profile. Curb weight ranges from roughly 4,608 to 4,731 pounds. The sporty XSE trim uses dark 20-inch alloy wheels and unique front and rear bumpers, while higher trims adopt a twin-band LED taillight treatment.
Hybrid Powertrain and Efficiency
Every 2021 Sienna pairs a 2.5-liter four-cylinder engine with two electric motors for a combined 243 horsepower, delivered through an electronically controlled continuously variable transmission (eCVT). Front-wheel drive is standard; the optional all-wheel-drive system adds a separate electric motor at the rear axle instead of a mechanical driveshaft, which helps in low-traction conditions. The EPA rates the front-drive Sienna at 36 mpg combined (36 city/36 highway) and the all-wheel-drive version at 35 mpg combined (35 city/36 highway). The hybrid battery recharges on its own, so the Sienna never needs to be plugged in.
Driving Modes, Towing, and Safety
Selectable EV, Normal, Eco, and Sport modes let the driver trade responsiveness for efficiency, and a sequential shifting feature increases regenerative braking on demand. Toyota rates every 2021 Sienna to tow up to 3,500 pounds when properly equipped, enough for a modestly sized travel trailer or a small boat. Toyota Safety Sense 2.0 is standard, bundling a pre-collision system with pedestrian and bicyclist detection, full-speed adaptive cruise control, lane departure alert with steering assist, automatic high beams, and road sign assist. A blind spot monitor with rear cross-traffic alert is standard on every trim, and the van carries 10 airbags.
Pricing
When it launched, the 2021 Sienna started at $35,635 for the front-drive LE, about $2,820 more than the discontinued 2020 base model, and reached just over $51,000 for an all-wheel-drive Platinum. The lineup included the LE, XLE, XSE, Limited, and Platinum, with all-wheel drive adding $1,800 to most trims.
Trim Levels and Available Features
The 2021 Sienna came in five trims. The LE is the value model with second-row captain’s chairs and a stowable middle seat. The XLE adds an eight-way power driver’s seat and can be ordered with seven seats. The XSE is the sporty trim, set apart by 20-inch wheels, a mesh grille, and sport-tuned suspension tuning. The Limited moves upscale with leather, heated and ventilated front seats, ottomans on the front-drive model, and the JBL audio system. The Platinum tops the range with the head-up display, a panoramic view monitor, and the digital rear-view mirror.
How It Compares
The fourth-generation Sienna competes with the Honda Odyssey and the Chrysler Pacifica, but it is the only one of the three with a standard hybrid powertrain. Its 36 mpg combined rating is far higher than the V6 Odyssey’s 22 mpg combined, and it is the only one offering all-wheel drive with a hybrid system. Buyers who need maximum cargo space may prefer the Pacifica’s Stow ‘n Go seats, which fold more completely, while the Sienna’s Super Long Slide chairs favor passenger comfort.
