There was a time when I clocked 40K+ miles/year, most of which were business, so I went through leased company vehicles (usually they tell you to turn it in at 75K) in less than 2 years . After much rationalization effort I managed to reduce this to 24K/year business and 12K/year private, but with the Sienna we practically stopped using my dear wife's car, because we like the comfort and the utility of the minivan - so it's up to 38K miles a year now.Man, I thought 18,600 miles on a 7 month old car was a lot. I do rideshare on the side and the van is used only for rideshare. If this was my only car, it would have almost 25k already. Either way, Toyotas ain't what they used to be. My 2010 cost me $8500 in 18 months and tried me for another $2500 before I gave up, so I extended my bumper-bumper warranty to 5 years/150,000 miles. Powertrain is lifetime, standard from the dealer.
I do not work on my own things because 1) I suck at it. I cross thread everything. 2) I lack the tools 3) I'm about as patient as a German Shepherd who just cornered an intruder. 4) I suck at it. Was unable to drain out a radiator petcock and do my own coolant flush. 5) I don't have much time in my busy life. 6) Everyone who has knowledge refuses to teach me. 7) I suck at it. Lots of broken bolts.
The dealer will have a fun time replacing my shocks and bearings under warranty, and after warranty is up; they will be left to make as much racket as they want until the van gets traded if I don't like the price.
As far as parts go, that bearing only made it one year. How much worse could aftermarket be if original equipment is THAT bad. Just a thought. Perhaps it is a fluke. First model year and maybe whoever installed it at the factory wasn't properly trained. I deliberately waited for a 2022 to hopefully bypass these types of production "kinks".
As for the quality, yes, I have a suspicion that the reliability and longevity of the "Western" brands peaked in the 1990's-2,000's and then started sliding downhill. The 2021 Sienna feels kind of "soft", in the same way Hyundais did 20 years ago. All kinds of things start quitting on you randomly after the bumper-to-bumper warranty runs out.