How do you change the spark plugs on a 1992 Toyota Previa?

Remove the passenger side seat (4 bolts) and the trim panel that holds the carpet down at the bottom of the doorframe. then pull the carpet back. This will expose the right-side engine access panel. Unbolt the panel (8-10 bolts), remove it, and you will see a black cover with 3 10 mm bolts in it. remove the bolts and shield, then the plug wires and voila - spark plugs are exposed!on a European model you ofto remove the driver seat.