2005 Highlander 3.3L V6. I asked the Toyota dealer to change the PCV valve on my 2005 Highlander and he refused, believe it or not! Business must be great. The service manager said: 1) they never have had an issue with the PCV valves on those model engines, 2) the valve is supposedly located under the engine cover and is "screwed into the intake manifold, thus 3) it would be expensive to change." I have 49k miles on this ride and I normally change the PCV valve every 40-50k miles on my cars. Obviously, this is a "do-it-yourself" job.