Robert 
2015 Toyota Sienna Minivan XLE 8-Passenger 4dr Minivan (3.5L 6cyl 6A)
Before you buy 2015/2016 Sienna you should know
 2015 and 2016 Sienna is a good looking van but please do your due diligence before you buy. I wish I have done it more my self but too late now.You can buy what you like but do a search on 2015 / 2016 sienna vibration or problems because it is true and it's common. I have it too and can't be fixed.Not doing enough researching for a family van I bought it because it was "TOYOTA" and have read good reviews on a 2015 Sienna with new improvements. Few days after the purchase around 300 miles on the Sienna. Feel dash, steering wheel and floor buzz vibration starting from complete stop on a hill when reaches 1150 to 1200 RPM (15~20 mph) and happens again after shifting to 2nd gear under 20 mph. Often passenger slider door gets stuck half way closing with beep and won't go back or close with switch. While holding traffic at school drop off lane switch the door switch to manual then get out show my face to angry people and have to close it manually then it works fine for a while.Both rear slider door glass makes metal tapping noise when driving with window open more than 3" under 15 ~25 miles. Sounds like glass rattling on the window channel seems like loose screw or no rubber on the channel.Front passenger door interior leather by the handle has wavy looks like from side view glue coming off or someone poked with fingers when gluing the upholstery.I have addressed these few concerns on my new sienna to the purchased dealer and they had some one from Toyota to inspect the Sienna.Conclusion to my concerns were that Toyota DSPM have compared to other sienna on the lot and since other Sienna does the same so it is normal and it is not warrantable and have no solution to correct the problems. Basically live with it or sell it because warranty is not going to cover it because it's normal to them.Why is Toyota comparing with other vehicles and call it " NORMAL CHARACTERISTIC OF THE VEHICLE " when I want to find out how to correct the problems.Sounds like they have engineered to rattle, vibrate and no solution to the problems so live with it or sell it to someone else who can live with it.  Did I miss lists of " NORMAL CHARACTERISTIC OF THE VEHICLE SHEET " when I bought the van?If this is the case Toyota needs to disclosed on the catalog that these van does make noise & vibrations before the purchase not after the purchased.Not too happy and already lost interest in new vehicle less than a month. Warranty and Toyota customer is really bad. It's a compared warranty not to correct them.I like the 2015 and up design but I am ready to sell my Sienna already for something else because I can not accept all these $37K normal vibrations and rattles came with the van plus Toyota said it's normal too.My believe level in Toyota product is gone for good. Good luck on your decision ! !