Where are the spark plugs on a 2001 Toyota highlander?
The other three spark plugs are in the rear side valve cover and have the same DIS Spark Plug Connectors and bolts. Unfortunately, the Upper Intake Plenum and Throttle Body must be removed if you need to get to these spark plugs. Also, to remove the Upper Intake Plenum and Throttle Body, the Strut Tower Brace has to to be removed to give you enough room to work.
