Walker 350-32027 Oxygen Sensor - Upstream

Walker 350-32027 Oxygen Sensor for Toyota Upstream Fitment

Walker Products 350-32027 is a specific-fit oxygen sensor engineered as an OE-style replacement for select Toyota applications. It is built for upstream Bank 1 Sensor 1 locations and is designed to provide the ECU with the feedback needed for proper fuel control and emissions monitoring.

Key Features

• Specific-fit oxygen sensor for targeted vehicle applications
• Upstream position for Bank 1 Sensor 1 service
• Non-heated sensor design
• 2-wire configuration with 20-gauge wiring
• Radiused polygon male connector for application-specific connection
• 18.0 mm thread diameter and flange mount design
• Wiring harness length: 9.37 in.; overall length: 12.91 in.

Product Details

Walker Products Aftermarket focuses on engine management and oxygen/air-fuel sensors built for direct replacement use. Part number 350-32027 is intended for upstream oxygen sensor service on select Toyota Celica, Camry, and RAV4 models, where accurate exhaust feedback helps the ECU manage air-fuel ratio and emissions performance. This part number 350-32027 is a specific application sensor, so fitment should be matched to the vehicle’s emissions configuration and sensor location.

Compatible With: Fits 1996-1999 Toyota Celica, upstream; Fits 1996 Toyota Camry, upstream; Fits 1996-1997 Toyota RAV4, upstream. For Toyota RAV4 applications, the listed fitment is for non-California emissions vehicles and Bank 1 Sensor 1 upstream positions only.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor engine performance caused by incorrect exhaust feedback
• Increased fuel consumption from inaccurate air-fuel control
• Higher exhaust emissions from a failing sensor
• Stored ECU fault codes tied to the affected sensor circuit

Installation Notes

Verify the vehicle’s emissions certification, sensor location, connector style, and thread size before installation. Inspect the sensor wiring harness and connector for damage, since physical wear can shorten service life and affect signal quality. This Walker oxygen sensor is intended for direct-fit replacement in the specified upstream position, including Toyota Celica upstream oxygen sensor and Toyota Camry upstream oxygen sensor applications listed above.

Quality Assurance

Walker Products has manufactured engine management components since 1946 and operates under Automotive ISO 9001/TS 16949 certification. The Walker Products Aftermarket line is built around application-specific replacement parts for modern ECU-controlled vehicles.