Walker 250-54109 Oxygen Sensor

Walker OE Oxygen Sensor for Nissan Applications

Walker Products OE oxygen sensor 250-54109 is a direct-fit, heated sensor built for specific vehicle applications and ECU feedback requirements. It is engineered for upstream and rear upstream positions on select Nissan and INFINITI models, including Nissan Altima, Sentra, Versa, Rogue, Cube, Maxima, Frontier, Armada, TITAN, Xterra, 350Z, and INFINITI G35 and QX56.

The Walker Products OE line focuses on application-specific fitment and sensor output for modern engine management systems. Part number 250-54109 uses a 4-wire heated design with a threaded mount, 18.0 mm thread diameter, and a radiused polygon male connector for the listed Nissan and INFINITI exhaust configurations.

Key Features

• Heated oxygen sensor for upstream and upstream rear positions
• Specific-fit design for listed Nissan and INFINITI applications
• 4-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• 13.31 in. wiring harness length and 16.85 in. overall length
• Radiused polygon male connector for OE-style connection
• Walker Products OE part number 250-54109

Detailed Description

Walker Products OE 250-54109 is an oxygen sensor designed for vehicles that rely on accurate exhaust feedback to manage fuel delivery and emissions control. This sensor is listed for 2007-2010 Nissan Altima, 2008-2010 Nissan Sentra, 2008-2010 Nissan Versa, 2008-2009 Nissan Rogue, 2009 Nissan Cube, 2009 Nissan Maxima, 2007-2008 Nissan Frontier, 2007 Nissan Armada, TITAN, Xterra, and 350Z, plus 2007 INFINITI G35 and QX56 in upstream left or right positions where specified. For search relevance, this includes long-tail needs such as a 2008 Nissan Altima upstream oxygen sensor, 2009 Nissan Sentra Bank 1 Sensor 1 oxygen sensor, and 2007 Nissan Armada upstream oxygen sensor.

Walker Products develops OE-style engine management sensors for specific applications so the ECU receives the expected diagnostic feedback. If the original sensor has failed, the vehicle may run poorly, use more fuel, increase exhaust emissions, or trigger a malfunction indicator light. Part number 250-54109 is built for the listed fitments and positions, including Nissan Rogue upstream Bank 1 Sensor 1 applications that are not California emissions certified.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Rough running or inconsistent air-fuel control
• Increased fuel consumption from inaccurate exhaust feedback
• Elevated exhaust emissions from a failing upstream sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle year, make, model, and sensor position before ordering. This part is listed for upstream, upstream left, upstream right, and upstream rear locations depending on the application. Verify connector shape, wire count, and thread size against the original sensor before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since physical damage can shorten sensor life and affect operation.

For fitment-based searches, this part is commonly referenced for 2007-2008 Nissan Altima upstream oxygen sensor, 2008-2009 Nissan Rogue Bank 1 Sensor 1, and 2007 INFINITI G35 upstream oxygen sensor applications. Part number 250-54109 should be matched to the exact position shown in the vehicle listing.

Quality Assurance

Walker Products OE sensors are engineered as original-equipment replacement parts for specific applications and are produced by an ISO 9001 / TS 16949 certified manufacturer. Since 1946, Walker Products has supplied engine management and fuel system components for automotive service needs.