Walker 250-54108 Oxygen Sensor - Upstream, Upstream Front or Upstream Rear

Walker Products OE Oxygen Sensor for Nissan

Walker Products OE 250-54108 is a heated oxygen sensor built as an OE-style replacement for specific Nissan applications. It is engineered for the correct fitment position and ECU feedback, helping maintain accurate exhaust monitoring on the vehicles listed below.

Key Features

• Heated oxygen sensor for faster operating response
• Specific-fit design for direct application matching
• 4-wire configuration with a radiused polygon male connector
• Threaded mounting with 18.0 mm thread diameter
• Wiring harness length: 13.31 in.; overall length: 16.85 in.
• Walker Products OE part number 250-54108

Product Details

Walker Products OE focuses on original-equipment replacement sensors for engine management systems, and the 250-54108 oxygen sensor follows that approach with application-specific fitment and sensor positioning. This heated sensor is designed to provide the diagnostic feedback the ECU expects, which is important for maintaining proper air-fuel control and emissions monitoring. It is a direct-fit oxygen sensor for 2007 Nissan Altima, 2007 Nissan Sentra, and 2007 Nissan Versa applications listed in the fitment data, including upstream front, upstream rear, and upstream positions where specified. If you are searching for a 2007 Nissan Altima upstream oxygen sensor or a 2007 Nissan Sentra Bank 1 Sensor 1 replacement, this part number 250-54108 is the relevant OE-style option.

Walker Products has supplied engine management and oxygen/air-fuel sensors for decades, with manufacturing aligned to automotive quality systems and application-specific cataloging. This part cross-references no additional part numbers in the provided data.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Poor engine operation caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel readings
• Higher exhaust emissions from a failing upstream sensor
• Fault codes stored in the ECU for the affected sensor circuit

Installation Notes and Tips

Confirm the sensor position before ordering, since this application is listed for upstream front, upstream rear, and upstream locations depending on vehicle. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion before installation. Because the sensor uses a threaded mount and a specific connector shape, verify thread diameter, harness length, and connector style against the original unit before replacement.

Quality Assurance

Walker Products OE 250-54108 is manufactured as an OE replacement sensor for the listed applications and is backed by Walker Products’ long-standing focus on engine management components and automotive quality processes.