Spark Plug: Service and Repair

Removal

Toyota does not provide any specific service and repair procedures for the spark plugs.

NOTE: The ignition for the Sienna is a coil-on-plug (COP) system. There are three coils on each bank, and under each ignition coil is a spark plug. Removal of the plugs near the firewall may require removal of the FR cowl top assembly and/or V-bank cover first.