HomeEmission Control > SensorsWalker 350-33101 Oxygen Sensor
Part #: 350-33101

Walker 350-33101 Oxygen Sensor

Walker Products Aftermarket, Upstream
⚙️ 35 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
📦Walker Products Aftermarket, Upstream
🚗Fitment: Nissan and INFINITI, Pickup, I35, Altima, QX4, Maxima, Pathfinder, and Sentra
🔄Easy Returns — Return within 60 days for a full refund
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Overview of Walker 350-33101 Oxygen Sensor

The Walker 350-33101 oxygen sensor is designed specifically for select Nissan and INFINITI models, including the Altima, Maxima, Pathfinder, and QX4. This heated oxygen sensor ensures accurate emissions control and optimal engine performance by monitoring exhaust gases effectively.

  • Heated sensor type for faster response times
  • Specific fit for Nissan and INFINITI vehicles
  • Threaded mounting type with 18.0 mm thread diameter
  • 17.24 inches wiring harness length with 3 wires of 20 gauge
  • Radiused polygon male connector for secure connection
  • Overall length of 20.79 inches for proper installation

Detailed Product Description

This Walker Products Aftermarket oxygen sensor (part number 350-33101) is engineered to meet the exact specifications of Nissan and INFINITI vehicles such as the Altima, I35, Maxima, Pathfinder, Pickup, QX4, and Sentra. The heated sensor design allows it to reach operating temperature quickly, improving fuel efficiency and reducing emissions. Featuring a 3-wire configuration with 20 gauge wiring, the sensor provides reliable signal transmission. The radiused polygon male connector ensures a secure and precise fit, while the threaded mounting type with an 18.0 mm diameter allows for straightforward installation. The wiring harness length of 17.24 inches and overall length of 20.79 inches are optimized for these specific vehicle models.

Walker Products Aftermarket Line

The Walker Products Aftermarket line focuses on providing replacement emission control components that meet or exceed OEM standards. This oxygen sensor is part of that line, offering a direct fit and reliable performance for Nissan and INFINITI vehicles. The product line emphasizes durability and compatibility, ensuring that the 350-33101 sensor integrates seamlessly with the vehicle’s existing systems.

Common Applications and Issues Addressed

  • Restores accurate oxygen sensing for proper air-fuel mixture
  • Helps resolve rough idling and engine hesitation
  • Reduces emissions-related check engine light triggers
  • Improves fuel economy by providing precise exhaust data
  • Prevents failed emissions tests due to faulty sensors

Installation Notes and Tips

When installing the Walker 350-33101 oxygen sensor, ensure the vehicle is cool to avoid burns. Use the correct 18.0 mm threaded mounting hole and verify the radiused polygon male connector fits securely. Avoid damaging the wiring harness during installation and confirm the sensor is properly seated to prevent exhaust leaks. It is recommended to use anti-seize compound on the threads if not pre-applied.

Quality Assurance and Warranty

Walker Products Aftermarket oxygen sensors are manufactured to meet stringent quality standards. While specific warranty details for part number 350-33101 should be confirmed at the point of purchase, Walker typically offers coverage against defects in materials and workmanship to ensure long-term reliability.

BrandWalker
Part Number350-33101
PositionWalker Products Aftermarket, Upstream
Connector GenderMale
Connector ShapeRadiused Polygon
Mounting TypeThreaded
Overall Length20.79
Sensor TypeHeated
Thread Diameter18.0
Universal Or Specific FitSpecific
Wire Gauge Measurement20
Wire Quantity3
Wiring Harness Length17.24

This part fits 35 vehicles. Search below:

YearMakeModelSubmodelLitersCylindersFuel TypePositionNotes
2009NissanPickup2.4LL4GASUpstreamBank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket
2009NissanPickup2.4LL4GASUpstreamFront oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket
2004INFINITII353.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket
2004INFINITII353.5LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products Aftermarket
2004NissanAltima3.5LV6GASUpstream RearTo 1/2004; Al 1/2004; Upstream; Rear; Walker Products Aftermarket
2004NissanAltima3.5LV6GASUpstream FrontTo 1/2004; Al 1/2004; Upstream; Front; Walker Products Aftermarket
2004NissanAltima3.5LV6GASUpstream RearUpstream Oxygen Sensor fits models up to January 2004, located at the rear position.; Walker Products Aftermarket
2004NissanAltima3.5LV6GASUpstream FrontTo 1/2004; Upstream; Front; Walker Products Aftermarket
2003INFINITII353.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket
2003INFINITII353.5LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products Aftermarket
2003INFINITIQX43.5LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2003NissanAltima3.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket
2003NissanAltima3.5LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products Aftermarket
2003NissanMaxima3.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket
2003NissanMaxima3.5LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products Aftermarket
2002INFINITII353.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket
2002INFINITII353.5LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products Aftermarket
2002INFINITIQX43.5LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2002NissanAltima3.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket
2002NissanAltima3.5LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products Aftermarket
2002NissanMaxima3.5LV6GASUpstream RearUpstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket
2002NissanMaxima3.5LV6GASUpstream FrontFront upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products Aftermarket
2002NissanPathfinder3.5LV6GASUpstream RightInstall upstream oxygen sensor on the right side.; Walker Products Aftermarket
2001INFINITIQX43.5LV6GASUpstream RightFrom 9/2001; Del 9/2001; Upstream; Right; Walker Products Aftermarket
2001INFINITIQX43.5LV6GASUpstream RightFrom 9/2001; Upstream; Right; Walker Products Aftermarket
2001NissanPathfinder3.5LV6GASUpstream RightDel 08/2000; Upstream; Right; From 08/2000; Walker Products Aftermarket
2001NissanPathfinder3.5LV6GASUpstream RightUpstream right oxygen sensor for models manufactured from August 2000.; Walker Products Aftermarket
2001NissanSentraXE1.8LL4GASUpstream RightExc.CA Series, w/ Mid Year Emissions; Excluye Serie CA, con Emisiones de mitad de año; Upstream; Right; Walker Products Aftermarket
2001NissanSentraXE1.8LL4GASUpstream LeftExc.CA Series, w/ Mid Year Emissions; Excluye Serie CA, con Emisiones de mitad de año; Upstream; Left; Walker Products Aftermarket
2001NissanSentraGXE1.8LL4GASUpstream RightExc.CA Series, w/ Mid Year Emissions; Excluye Serie CA, con Emisiones de mitad de año; Upstream; Right; Walker Products Aftermarket
2001NissanSentraGXE1.8LL4GASUpstream LeftExc.CA Series, w/ Mid Year Emissions; Excluye Serie CA, con Emisiones de mitad de año; Upstream; Left; Walker Products Aftermarket
2001NissanSentraXE1.8LL4GASUpstream RightExc.CA Series Mid Year Emissions Upstream Right Oxygen Sensor; Walker Products Aftermarket
2001NissanSentraXE1.8LL4GASUpstream LeftExc.CA Series, w/ Mid Year Emissions; Upstream; Left; Walker Products Aftermarket
2001NissanSentraGXE1.8LL4GASUpstream RightExc.CA Series Mid Year Emissions Upstream Right Oxygen Sensor; Walker Products Aftermarket
2001NissanSentraGXE1.8LL4GASUpstream LeftExc.CA Series, w/ Mid Year Emissions; Upstream; Left; Walker Products Aftermarket

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.