Walker 250-21058 Oxygen Sensor - Upstream

Walker Products OE Oxygen Sensor for Toyota

Walker Products OE 250-21058 is a specific-fit oxygen sensor engineered as an OE-style replacement for select Toyota applications. It is built for upstream placement and is designed to deliver the diagnostic feedback the ECU expects on vehicles such as the Toyota Camry and Toyota Celica.

For Toyota Camry and Toyota Celica owners searching for an upstream oxygen sensor replacement, part number 250-21058 offers application-specific fitment with the correct connector, wiring, and mounting style for the listed vehicles.

Key Features

• Specific-fit oxygen sensor for select Toyota applications
• Upstream position for bank 1 sensor 1 and front sensor locations listed below
• Non-heated sensor design
• Radiused polygon female connector
• 18.0 mm thread diameter
• Flange mount design
• 17.24 in. wiring harness length with 20-gauge wire
• Overall length: 20.79 in.

Detailed Description

Walker Products OE 250-21058 is part of the Walker Products OE line, which focuses on original-equipment-style replacement sensors for vehicle-specific applications. This oxygen sensor is built for upstream use and is matched to the fitment, connector shape, wire count, and mounting style required by the listed Toyota Camry and Toyota Celica applications. When replacing an aging upstream oxygen sensor, using the correct sensor type and connector configuration helps maintain proper ECU feedback and emissions-system operation.

Fits 1983-1986 Toyota Camry, upstream. Fits 1986 Toyota Celica, upstream. This part number, 250-21058, is intended for the listed Toyota applications only and should be matched to the vehicle’s sensor location before ordering.

What It Helps Address

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

Installation Notes and Tips

Confirm the vehicle’s year, make, model, and upstream sensor position before installation. Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear, since damaged wiring can shorten sensor life and affect readings. Verify the flange mount, thread diameter, and connector style match the original part before replacement. For Toyota Camry and Toyota Celica applications, compare the old sensor to Walker Products OE 250-21058 to confirm the correct fitment.

Quality Assurance

Walker Products has supplied engine management and fuel system components since 1946 and manufactures OE-style replacement sensors for specific applications. The Walker Products OE line is developed for vehicle-matched fitment and ECU feedback requirements, with manufacturing supported by Automotive ISO9001/TS 16949 certification.