Keep the ECU fed with accurate air-fuel data using the Walker Products Oxygen Sensor 350-33006 (also written 35033006), a 3-wire heated narrow-band sensor that installs as a direct-fit replacement in the upstream left position on the 2001 Infiniti QX4 (V6-3.5L) and 2001 Nissan Pathfinder (V6-3.5L). The oxygen sensor measures combustion efficiency based on the amount of oxygen in the exhaust gas, reporting the air-fuel ratio back to the engine's control system.
If a failed upstream left oxygen sensor is the cause of poor running, higher fuel consumption, increased emissions, or an illuminated malfunction indicator light, this replaces it. Country of origin: China.
What vehicles does this oxygen sensor fit?
It is a direct-fit replacement for the 2001 Infiniti QX4 (V6-3.5L) and 2001 Nissan Pathfinder (V6-3.5L). See the Buyer's Guide tab to confirm fitment for your vehicle.
Is this a heated sensor?
Yes. It is a 3-wire heated narrow-band oxygen sensor.
Which position is this sensor for?
It is cataloged for the upstream left position on the listed applications.
What are signs the oxygen sensor may need replacing?
A failing sensor can make the engine run poorly, increase fuel consumption or emissions, or illuminate the malfunction indicator light. Inspect the sensor, wiring, and connector for damage, and diagnose the cause before replacing.
How does this sensor mount?
It uses a threaded mounting and takes a 22 mm wrench size, with a 3-blade rectangular connector.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
