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.
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HOMESERVICE MANUALSTOYOTA2011YARIS L4-1.5L (1NZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMSPARK PLUGSERVICE AND REPAIRREMOVAL
2011 Toyota Yaris L4-1.5L (1NZ-FE)
Removal
2011 Toyota Yaris L4-1.5L (1NZ-FE)SECTION Removal
1NZ-FE IGNITION: IGNITION COIL AND SPARK PLUG: REMOVAL
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
2. REMOVE CYLINDER HEAD COVER NO. 2
(a) Remove the 4 nuts and cylinder head cover No. 2.
3. REMOVE IGNITION COIL NO. 1
(a) Disconnect the 4 ignition coil connectors.
(b) Remove the 4 bolts and 4 ignition coils.
4. REMOVE SPARK PLUG
(a) Using a 14 mm spark plug wrench, remove the 4 spark plugs.
RENDER: 1.0x
NO RELATED
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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.