 The Avalon is 4 years old now.  Only 40,000 miles on the odometer (before retirement we averaged 22,000 a year on our primary car).  Still no repairs, no problems.   We just change the oil, replace worn tires and brakes and drive it without worry.  Great fuel economy, great comfort, good performance.  Fuel economy seems to be a little less than at 2 years, 36 around town and 40 on the highway.  Whether I'm just measuring it more accurately or it's dropped a little I don't know.  It's still way better than any full size car I've ever owned.