Please refer to the following sources for additional information: • Your vehicle’s Owner’s Manual• Your vehicle’s Repair Manual• Genuine Toyota Spark Plugs Brochure (Available in English and Spanish)... Tools and Parts Required • Genuine Toyota Spark Plugs • Spark plug wrench or socket set with spark plug socket• Gapping tool and wire feeler gauge• Rag or paper towels• Penetrating oil• Torque wrench• Pen or pencil.... INSPECT OLD SPARKPLUGS – If the plugshave anything otherthan brown to light tanor gray deposits, savethem, and speak to yourToyota dealer's servicedepartment advisor.Check repair manual fordescription of bad sparkplugs. Spark plugs aregood diagnosticindicators of engineperformance problems. NOTE: Platinum tip spark plugs with a service life of more than50,000 miles and iridium tip plugs with a service life exceeding100,000 miles are installed on some Toyota models. Refer toyour Owner's Manual or the Toyota Spark Plug ApplicationChart for the correct type of spark plugs for your vehicle.