The Quest Platinum has a standard Around View ® Monitor to allow the driver to see objects all around the vehicle on a screen. The Sienna only offers a rear monitor and front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.
Both the Quest and the Sienna have standard driver and passenger frontal airbags, front side-impact airbags, side-impact head airbags, front seatbelt pretensioners, front wheel drive, height adjustable front shoulder belts, plastic fuel tanks, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding and available blind spot warning systems.
J.D. Power and Associates rated the Quest first among minivans in their 2015 Initial Quality Study. The Sienna isn’t in the top three.
On the EPA test cycle the Quest gets better fuel mileage than the Sienna FWD (20 city/27 hwy vs. 18 city/25 hwy).
The Quest’s standard front and rear disc brakes are vented to help dissipate heat for shorter stops with less fading. The rear discs on the Sienna are solid, not vented.
The Quest stops shorter than the Sienna:
60 to 0 MPH
The Quest has a standard easy tire fill system. When inflating the tires, the vehicle’s integrated tire pressure sensors keep track of the pressure as the tires fill and tell the driver when the tires are inflated to the proper pressure. The Sienna doesn’t offer vehicle monitored tire inflation.
For superior ride and handling, the Nissan Quest has fully independent front and rear suspensions. An independent suspension allows the wheels to follow the road at the best angle for gripping the pavement, without compromising ride comfort. The Toyota Sienna has a rear torsion beam axle, with a semi-independent rear suspension.
The Quest has vehicle speed sensitive variable-assist power steering, for low-effort parking, better control at highway speeds and during hard cornering, and a better feel of the road. The Sienna doesn’t offer variable-assist power steering.
For better maneuverability, the Quest S/SV’s turning circle is 1.3 feet tighter than the Sienna AWD’s (36.1 feet vs. 37.4 feet). The Quest SL/Platinum’s turning circle is .8 feet tighter than the Sienna’s (36.7 feet vs. 37.5 feet).
To almost totally eliminate engine vibration in the passenger area, the Quest has a liquid-filled front engine mount. The liquid helps further dampen engine harshness. The Sienna uses conventional solid rubber engine mounts.
The Quest has 13.4 cubic feet more passenger volume than the Sienna (177.8 vs. 164.4).
The Quest has 1.1 inches more front headroom, 3.3 inches more front legroom, 1.9 inches more rear headroom, 1.7 inches more third row headroom, 4.2 inches more third row legroom and .1 inches more third row shoulder room than the Sienna.
The front step up height for the Quest is 1 inches lower than the Sienna (15.7” vs. 16.7”). The Quest’s rear step up height is 3.3 inches lower than the Sienna’s (15.7” vs. 19”).
If the front windows are left down on the Quest SV/SL/Platinum the driver can raise them using the key in the outside lock cylinder. On a hot day the driver can lower the windows from outside the vehicle using the key in the outside lock cylinder or the keyless remote. The driver of the Sienna can only operate the windows from inside the vehicle, with the ignition on.
The Quest’s speed-sensitive wipers speed up when the vehicle does, so that the driver doesn’t have to continually adjust the speed of the wipers. The Sienna’s standard manually variable intermittent wipers have to be constantly adjusted.
Insurance will cost less for the Quest owner. The Car Book by Jack Gillis rates the Quest with a number “5” insurance rate while the Sienna is rated higher at a number “8” rate.
According to The Car Book by Jack Gillis, the Quest is less expensive to operate than the Sienna because typical repairs cost much less on the Quest than the Sienna, including $74 less for a water pump, $101 less for fuel injection, $530 less for a fuel pump, $762 less for a timing belt/chain and $259 less for a power steering pump.
Both the Nissan Quest and Toyota Sienna won four awards in Kiplinger’s 2015 car issue.
Car and Driver performed a comparison test in its May 2011 issue and they ranked the Nissan Quest Platinum higher than the Toyota Sienna Limited.