Walker 250-54106 Oxygen Sensor - Upstream

Walker Products OE Oxygen Sensor for Toyota

Walker Products OE 250-54106 is a heated, specific-fit oxygen sensor engineered for upstream use on select Toyota applications. It is built for the 1997-1999 Toyota Camry and 1999 Toyota Solara with California emissions ESV coverage, where accurate exhaust feedback is critical for engine management.

Key Features

• Heated oxygen sensor for faster operating temperature and signal response
• Specific-fit design for direct application matching
• Threaded mounting type with 18.0 mm thread diameter
• 4-wire configuration with 20-gauge wiring
• 17.24 in. wiring harness length and 20.79 in. overall length
• Male connector with radiused polygon shape
• Upstream position for select Toyota Camry and Toyota Solara models

Detailed Description

Walker Products OE 250-54106 is an OE-style oxygen sensor built to deliver the diagnostic feedback the ECU expects from the upstream exhaust stream. As part of the Walker Products OE line, this sensor is application-specific and matched to the required fitment position, making it a direct replacement choice for 1997-1999 Toyota Camry upstream oxygen sensor service and 1999 Toyota Solara upstream oxygen sensor service on California emissions ESV vehicles. The heated design helps the sensor reach operating temperature efficiently, supporting stable fuel control and emissions monitoring.

Walker Products has long focused on engine management and oxygen/air-fuel sensing for vehicle-specific replacement needs. Part number 250-54106 is intended for exact-position installation where the original sensor uses a threaded mount, 4-wire layout, and the listed connector and harness configuration. If your Toyota Camry or Toyota Solara has an upstream sensor fault, this part number 250-54106 is the correct OE-style replacement to verify against the vehicle’s emissions calibration and connector style.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation from incorrect air-fuel correction
• Higher exhaust emissions from a failing sensor signal
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes and Tips

Confirm the vehicle is a 1997-1999 Toyota Camry or 1999 Toyota Solara with California emissions ESV coverage before ordering. Match the upstream position, connector shape, wire count, and thread diameter to the original sensor. Inspect the sensor wiring harness and connector for heat damage, corrosion, or abrasion before installation, since damaged wiring can shorten sensor life and affect ECU feedback.

Quality Assurance

Walker Products OE sensors are engineered as original-equipment replacement parts for specific applications and fitment positions. Walker Products is an automotive ISO 9001/TS 16949 certified company with a long history in engine management and fuel system components. This part cross-references Walker Products OE 250-54106 for the same application.