Walker 250-24285 Oxygen Sensor

Walker Products OE Oxygen Sensor for Nissan and Infiniti

Walker Products OE Part Number 250-24285 is a heated oxygen sensor built for specific downstream applications on select Nissan and Infiniti vehicles. It is engineered as an OE-style replacement that delivers the ECU feedback needed for proper fuel control and emissions monitoring.

Key Features

• Heated oxygen sensor for downstream placement
• Specific fit design for the listed vehicle applications
• 4-wire configuration with 20-gauge wiring
• Threaded mounting with 18.0 mm thread diameter
• Radiused polygon male connector for application-specific connection
• Wiring harness length: 32.99 in.; overall length: 36.54 in.

Product Details

Walker Products OE 250-24285 is designed for vehicles that rely on downstream oxygen sensor input to monitor exhaust efficiency and support emissions system diagnostics. This sensor is a direct-fit replacement for select 2001-2004 Infiniti QX4 and I35 models, plus 2001-2004 Nissan Pathfinder, Maxima, and Sentra applications listed below. For drivers searching for a downstream oxygen sensor for a 2002 Nissan Sentra, a downstream right oxygen sensor for a 2001 Nissan Pathfinder, or an OE replacement oxygen sensor for a 2002-2004 Infiniti I35, this part number matches the specified position and connector style.

Walker Products OE focuses on original-equipment replacement coverage, with parts built for the exact application, fitment position, and ECU feedback requirements. The 250-24285 oxygen sensor is intended for downstream front, downstream right, downstream left, and downstream positions where listed, helping maintain accurate exhaust monitoring on the supported Nissan and Infiniti platforms. This part number 250-24285 is also a useful reference when cross-checking catalog listings for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Elevated exhaust emissions from a failing downstream sensor
• Rough engine operation tied to sensor signal issues
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

• Confirm the exact year, make, model, and sensor position before ordering.
• Match the connector shape, wire count, and threaded mounting style to the original sensor.
• Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before installation.
• Use the listed downstream position only where the fitment table specifies it.
• Clear diagnostic trouble codes after installation and verify proper ECU feedback.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and operates as an Automotive ISO 9001/TS 16949 certified company. The OE product line is built around application-specific fitment and diagnostic performance for the listed vehicles.

• Fits 2002-2004 Infiniti I35, downstream front
• Fits 2002-2003 Infiniti QX4, downstream right
• Fits 2002-2003 Nissan Maxima, downstream front
• Fits 2002 Nissan Pathfinder, downstream right
• Fits 2002 Nissan Sentra, downstream left
• Fits 2002 Nissan Sentra, downstream
• Fits 2001 Infiniti QX4, downstream right
• Fits 2001 Nissan Pathfinder, downstream right
• Fits 2001 Nissan Sentra, downstream right