My brother owns a 2005 Sienna. Here are the problems that he has: New tires HAVE to be installed every 18,000 miles. Common with AWD vans from Toyota. Two radiators, five sets of shocks, door hinges that are doomed to failure one day soon (bad hinge design allows doors to actually break free of stops and slam on a persons hand or arm - repair is extremely expensive) He gets crappy service from the dealers on a $44,000 van as they treat him like a jerk for bringing him the car. The van only has 65,000 miles on it.
Now, I must say, the way that Toyota handled the frame issue on the Tacoma's is an example of VERY smart corporate thinking and should be the model for all automakers to follow. Buying the trucks back at 1.5 times blue book and crushing them (no matter the condition) was brilliant. Every automaker should learn from this example.
Now, the way Toyota treats it's employees in the factories is yet another story, is well documented on the net. For the truth about defects in Toyotas, read this article of the recalls and issues written in February of 2007:
http://www.thetruthaboutcars.com/toy...-and-memogate/
I will never own a Japanese car again, and find them to be souless modes of point a to point b, which is not my cup of tea when it comes to driving. As for your 4runner not needing ANY service for 75,000 miles, does that not scare you that you are driving what is supposed to be a heavy SUV and you have not worn wear parts like tires and brakes? It tells me the truck is way too light for it's intended purpose, or the brakes and tires are made of some exotic materials that fight wear at all costs.