According to the Haynes manual it says to torque: 2001 to 2005 at 15 Ft-lbs. Going to 21 ft lbs you are over torquing it. Just remember a spark plug is not just made for one car. Some have steel heads and some have aluminum heads. Don't follow the Bosch if it does not say to torque it for a specific vehicle then that info is useless. Also I prefer NGK or Denso which are recommended by Toyota. I have used Bosch on a Camry with no problems so as long as you don't have performance problem should be ok.