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 MANUALSINFINITI2002I35 V6-3.5L (VQ35DE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOXYGEN SENSORSERVICE AND REPAIR
2002 Infiniti I35 V6-3.5L (VQ35DE)
Oxygen Sensor: Service and Repair
2002 Infiniti I35 V6-3.5L (VQ35DE)SECTION Service and Repair
EXHAUST SYSTEM
CAUTION: Always replace exhaust gaskets with new ones when reassembling.
With engine running, check all tube connections for exhaust gas leaks, and entire system for unusual noises.
Check to ensure that mounting brackets and mounting insulators are installed properly and free from undue stress. Improper installation could result in excessive noise or vibration.
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 inch) onto a hard surface such as a concrete floor; use a new one.
Before installing a new oxygen sensor, clean exhaust system threads using oxygen sensor thread cleaner tool, J-43897-18 or J-43897-12, and apply anti-seize lubricant.
GDo not overtorque the oxygen sensor. Doing so may cause damage to the oxygen sensor, resulting in the MIL coming on.
Exhaust System:
CAUTION: Always replace exhaust gaskets with new ones when reassembling.
With engine running, check all tube connections for exhaust gas leaks, and entire system for unusual noises.
Check to ensure that mounting brackets and mounting insulators are installed properly and free from undue stress. Improper installation could result in excessive noise or vibration.
Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 inch) onto a hard surface such as a concrete floor; use a new one.
Before installing a new oxygen sensor, clean exhaust system threads using oxygen sensor thread cleaner tool, J-43897-18 or J-43897-12, and apply anti-seize lubricant.
GDo not overtorque the oxygen sensor. Doing so may cause damage to the oxygen sensor, resulting in the MIL coming on.
RENDER: 1.0x
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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.