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 one bank with one ignition cable from each leading to a spark plug on the opposite bank. Also, under each ignition coil is another spark plug. Removal of the plugs near the firewall may require removal of the FR cowl top assembly first.