Genuine Toyota Sienna Spark Plug

Toyota Sienna Spark Plug Parts Questions & Answers

• Plug, Spark
  90919-01194
  Q: How to replace spark plug on Toyota Sienna?

  A: Spark plug replacement requires a spark plug socket that fits onto a ratchet, lined with a rubber grommet to protect the porcelain insulator of the spark plug and to hold the plug while you insert it into the spark plug hole. You will also need a wire-type feeler gauge to check and adjust the spark plug gap and a torque wrench to tighten the new plugs to the specified torque. On engines equipped with a V-bank cover, remove the three 5-mm cap nuts and detach the cover for access. If you are replacing the plugs, purchase the new plugs, adjust them to the proper gap, and then replace each plug one at a time. The manufacturer specifies that only platinum- or iridium-tipped spark plugs be used on these models. Inspect each of the new plugs for defects. Check the electrode gaps of the new plugs. Remove the upper intake manifold for access to the rear spark plugs. Remove the bolts and detach each ignition coil assembly from the spark plugs. To prevent the possibility of mixing up spark plug wires, work on one spark plug at a time. Remove the wire and boot from one spark plug. If compressed air is available, blow any dirt or foreign material away from the spark plug area before proceeding. Remove the spark plug. Apply a small amount of anti-seize compound to the spark plug threads, but do not get the compound on the spark plug electrodes. Attach the plug wire to the new spark plug, again using a twisting motion on the boot until it is firmly seated on the end of the spark plug. Follow the above procedure for the remaining spark plugs, replacing them one at a time to prevent mixing up the spark plug wires.