Walker 350-35126 Oxygen Sensor - Upstream, Upstream Rear or Upstream Right

Walker OE Replacement Oxygen Sensor 350-35126

Walker OE Replacement oxygen sensor 350-35126 is a specific-fit, heated wide-band sensor built for direct replacement in select Nissan, Infiniti, and Cadillac applications. It is engineered for the correct mounting position and ECU feedback expected by the vehicle’s diagnostic system.

For vehicles such as the Nissan Maxima, Murano, Quest, and Titan, as well as Infiniti M45 and FX45 applications, this sensor supports accurate air-fuel monitoring at the upstream right or upstream rear location where specified. The Walker OE Replacement line focuses on application-specific fitment for engine management and emissions control service.

Key Features

• Part number 350-35126
• Heated wide-band oxygen sensor for precise exhaust feedback
• Specific-fit design for the listed vehicle applications
• Threaded mounting with M18 x 1.5 thread size
• 5-wire configuration with oblong male connector
• 22 mm wrench size and 410.0 overall length
• OE Replacement line for direct-fit service applications

Detailed Description

Walker Products designs its engine management and oxygen/air-fuel sensors as OE-style replacements for defined vehicle applications. Part number 350-35126 is a heated wide-band oxygen sensor with a spade terminal type, male connector and terminal gender, and threaded mounting for the specified upstream positions. It is intended for vehicles that require accurate diagnostic feedback to the ECU, helping maintain proper fuel control and emissions system operation. This part number 350-35126 is listed for 2000-2010 Nissan, Infiniti, and Cadillac models, including Nissan Maxima, Murano, Quest, and Titan, plus Infiniti M45 and FX45 applications.

This part cross-references no listed aftermarket part numbers in the provided data.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough engine operation caused by incorrect air-fuel readings
• Increased fuel consumption from inaccurate exhaust feedback
• Elevated exhaust emissions from a failing upstream sensor
• Fault codes stored in the ECU for sensor or related system issues

Installation Notes and Tips

• Verify the exact position before installation: upstream right, upstream rear, or upstream as listed for the vehicle.
• Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before replacement.
• Confirm thread size, connector shape, and wire count match the original sensor.
• Use the correct 22 mm wrench size and avoid cross-threading the M18 x 1.5 threads during installation.
• After installation, clear stored fault codes and confirm the ECU reads the new sensor correctly.

Quality Assurance

Walker Products manufactures engine management sensors under ISO 9001 and TS 16949 quality systems. Since 1946, the brand has supplied OE-replacement sensor and fuel system components for a wide range of vehicle applications.