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Walker 350-33101 Oxygen Sensor
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.
| Brand | Walker |
| Part Number | 350-33101 |
| Position | Walker Products Aftermarket, Upstream |
| Connector Gender | Male |
| Connector Shape | Radiused Polygon |
| Mounting Type | Threaded |
| Overall Length | 20.79 |
| Sensor Type | Heated |
| Thread Diameter | 18.0 |
| Universal Or Specific Fit | Specific |
| Wire Gauge Measurement | 20 |
| Wire Quantity | 3 |
| Wiring Harness Length | 17.24 |
This part fits 35 vehicles. Search below:
| Year | Make | Model | Submodel | Liters | Cylinders | Fuel Type | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2009 | Nissan | Pickup | 2.4L | L4 | GAS | Upstream | Bank 1 Sensor 1 needs an upstream oxygen sensor.; Walker Products Aftermarket | |
| 2009 | Nissan | Pickup | 2.4L | L4 | GAS | Upstream | Front oxygen sensor compatible with various vehicle models.; Walker Products Aftermarket | |
| 2004 | INFINITI | I35 | 3.5L | V6 | GAS | Upstream Rear | Upstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket | |
| 2004 | INFINITI | I35 | 3.5L | V6 | GAS | Upstream Front | Front upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products Aftermarket | |
| 2004 | Nissan | Altima | 3.5L | V6 | GAS | Upstream Rear | To 1/2004; Al 1/2004; Upstream; Rear; Walker Products Aftermarket | |
| 2004 | Nissan | Altima | 3.5L | V6 | GAS | Upstream Front | To 1/2004; Al 1/2004; Upstream; Front; Walker Products Aftermarket | |
| 2004 | Nissan | Altima | 3.5L | V6 | GAS | Upstream Rear | Upstream Oxygen Sensor fits models up to January 2004, located at the rear position.; Walker Products Aftermarket | |
| 2004 | Nissan | Altima | 3.5L | V6 | GAS | Upstream Front | To 1/2004; Upstream; Front; Walker Products Aftermarket | |
| 2003 | INFINITI | I35 | 3.5L | V6 | GAS | Upstream Rear | Upstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket | |
| 2003 | INFINITI | I35 | 3.5L | V6 | GAS | Upstream Front | Front upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products Aftermarket | |
| 2003 | INFINITI | QX4 | 3.5L | V6 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket | |
| 2003 | Nissan | Altima | 3.5L | V6 | GAS | Upstream Rear | Upstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket | |
| 2003 | Nissan | Altima | 3.5L | V6 | GAS | Upstream Front | Front upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products Aftermarket | |
| 2003 | Nissan | Maxima | 3.5L | V6 | GAS | Upstream Rear | Upstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket | |
| 2003 | Nissan | Maxima | 3.5L | V6 | GAS | Upstream Front | Front upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products Aftermarket | |
| 2002 | INFINITI | I35 | 3.5L | V6 | GAS | Upstream Rear | Upstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket | |
| 2002 | INFINITI | I35 | 3.5L | V6 | GAS | Upstream Front | Front upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products Aftermarket | |
| 2002 | INFINITI | QX4 | 3.5L | V6 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket | |
| 2002 | Nissan | Altima | 3.5L | V6 | GAS | Upstream Rear | Upstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket | |
| 2002 | Nissan | Altima | 3.5L | V6 | GAS | Upstream Front | Front upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products Aftermarket | |
| 2002 | Nissan | Maxima | 3.5L | V6 | GAS | Upstream Rear | Upstream oxygen sensor for rear exhaust system.; Walker Products Aftermarket | |
| 2002 | Nissan | Maxima | 3.5L | V6 | GAS | Upstream Front | Front upstream oxygen sensor needed for proper functionality near exhaust manifold.; Walker Products Aftermarket | |
| 2002 | Nissan | Pathfinder | 3.5L | V6 | GAS | Upstream Right | Install upstream oxygen sensor on the right side.; Walker Products Aftermarket | |
| 2001 | INFINITI | QX4 | 3.5L | V6 | GAS | Upstream Right | From 9/2001; Del 9/2001; Upstream; Right; Walker Products Aftermarket | |
| 2001 | INFINITI | QX4 | 3.5L | V6 | GAS | Upstream Right | From 9/2001; Upstream; Right; Walker Products Aftermarket | |
| 2001 | Nissan | Pathfinder | 3.5L | V6 | GAS | Upstream Right | Del 08/2000; Upstream; Right; From 08/2000; Walker Products Aftermarket | |
| 2001 | Nissan | Pathfinder | 3.5L | V6 | GAS | Upstream Right | Upstream right oxygen sensor for models manufactured from August 2000.; Walker Products Aftermarket | |
| 2001 | Nissan | Sentra | XE | 1.8L | L4 | GAS | Upstream Right | Exc.CA Series, w/ Mid Year Emissions; Excluye Serie CA, con Emisiones de mitad de año; Upstream; Right; Walker Products Aftermarket |
| 2001 | Nissan | Sentra | XE | 1.8L | L4 | GAS | Upstream Left | Exc.CA Series, w/ Mid Year Emissions; Excluye Serie CA, con Emisiones de mitad de año; Upstream; Left; Walker Products Aftermarket |
| 2001 | Nissan | Sentra | GXE | 1.8L | L4 | GAS | Upstream Right | Exc.CA Series, w/ Mid Year Emissions; Excluye Serie CA, con Emisiones de mitad de año; Upstream; Right; Walker Products Aftermarket |
| 2001 | Nissan | Sentra | GXE | 1.8L | L4 | GAS | Upstream Left | Exc.CA Series, w/ Mid Year Emissions; Excluye Serie CA, con Emisiones de mitad de año; Upstream; Left; Walker Products Aftermarket |
| 2001 | Nissan | Sentra | XE | 1.8L | L4 | GAS | Upstream Right | Exc.CA Series Mid Year Emissions Upstream Right Oxygen Sensor; Walker Products Aftermarket |
| 2001 | Nissan | Sentra | XE | 1.8L | L4 | GAS | Upstream Left | Exc.CA Series, w/ Mid Year Emissions; Upstream; Left; Walker Products Aftermarket |
| 2001 | Nissan | Sentra | GXE | 1.8L | L4 | GAS | Upstream Right | Exc.CA Series Mid Year Emissions Upstream Right Oxygen Sensor; Walker Products Aftermarket |
| 2001 | Nissan | Sentra | GXE | 1.8L | L4 | GAS | Upstream Left | Exc.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.