 Update on Sienna as of 3/10/17  The van's engine still runs strong and I've had no problems with the engine or transmission since purchasing the van new.  However, I was told by the dealership that the transmission is now leaking.  I am still VERY disappointed with the parts that have been replaced on the van by a Toyota dealership not lasting like I feel they should.  Seems I am only getting 1/2 life on the replaced Toyota parts such as the rack-n-pinion, shocks, struts, and axles.  The original parts lasted me over 215,000 miles, and these genuine Toyota replacement parts haven't even lasted 90,000 miles.  A big disappointment.I've owned my Sienna since it was new.I now have over 300,000 miles on my van.It has given me little problem over the years, but now seems to be falling apart.  It's been one thing after another.  This includes the interior and exterior parts.  So it would appear that the interior's life expectancy is about 10 years when the plastic parts start cracking and breaking, and when the electrical starts to give problems.  The tires still wear unevenly and need replacing at about 1/2 life even with regular alignments & tire rotations.I've been happy with the van until it hit the 10 year mark and about 280,000 miles.  Was hoping to get 400,000 miles on the van before letting her go.  But she won't make it that far.