Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2007 Toyota Yaris S, AutomaticFACTORY OEM SERVICE PROCEDURE

Service Data

1NZ-FE IGNITION - SERVICE DATA

Spark plug	Standard resistance	10 M ohms or more
	Recommended spark plug	SK16R11 DENSO made IFR5A11 NGK made
	Maximum electrode gap	1.3 mm (0.051 in.) for used spark plug
	Electrode gap	1.0 to 1.1 mm (0.039 to 0.043 in.) for new spark plug

Factory Service Tools

Use the Manual With the Right Hardware

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.