I just learned about a possible defect in Toyota's popular 2AZ-FE engine in which the head bolts work loose over time, destroying the threads, and killing the engine. The "repair" can be a new engine costing $4,000 to $6,000 in parts and labor. One poster has said 2002 to 2006 Camrys are affected. A different poster has said 2001 to 2004 Camrys are affected. It would be nice to know which vehicles can get clobbered. Lexus cars don't seem immune--not sure about Highlanders with the 2AZ-FE. The engines usually have been failing between 50,000 and 100,000 miles, often out of warranty. Considering I have an '06 Camry with the 2AZ-FE engine, I'm not happy to hear about this. You can read more about it here: http://www.camryforums.com/forum/showthread.php?t=1301 Does anyone know if the problem was fixed after the '04 model year Camry? Or are '06's affected too?