Walker 250-21055 Oxygen Sensor - Upstream

Walker Products OE Oxygen Sensor for Toyota Camry

Walker Products OE Part Number 250-21055 is a specific-fit oxygen sensor for select 1992-1993 Toyota Camry upstream applications. Built as an OE-style replacement, it is designed to deliver the diagnostic feedback the ECU expects from the upstream Bank 1 Sensor 1 position.

The Walker Products OE line focuses on application-specific engine management sensors for direct replacement use. For Toyota Camry owners diagnosing fuel trim or emissions-related faults, this sensor is matched to the listed fitment and mounting requirements.

Key Features

• Specific-fit oxygen sensor for select Toyota Camry models
• Upstream Bank 1 Sensor 1 application
• Non-heated sensor design
• Male connector with radiused polygon connector shape
• 18.0 mm thread diameter and flange mount design
• 17.44 in. wiring harness length with 20-gauge wire
• Overall length: 20.98 in.

Product Details

Walker Products OE 250-21055 is engineered for 1992-1993 Toyota Camry vehicles in the upstream position, specifically for non-California emissions applications. As an oxygen sensor, it helps the ECU monitor exhaust oxygen content so the engine management system can adjust fueling and track emissions performance. This part number is built for the listed application and fitment position, making it a direct replacement choice for Toyota Camry upstream oxygen sensor service.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Check engine light related to upstream oxygen sensor faults
• Poor fuel economy caused by inaccurate exhaust feedback
• Rough engine operation from incorrect air-fuel correction
• Elevated exhaust emissions from a failing sensor
• Stored ECU fault codes tied to Bank 1 Sensor 1 performance

Installation Notes and Tips

Confirm the vehicle is a 1992-1993 Toyota Camry with non-California emissions before ordering. This sensor is listed for the upstream Bank 1 Sensor 1 position and is not suitable for California emissions-certified vehicles. Before replacement, inspect the sensor wiring harness and connector for damage, since physical wear can shorten sensor life and affect operation.

Quality Assurance

Walker Products states that its engine management sensors are developed as OE replacement parts and manufactured under ISO 9001/TS 16949 quality systems. The Walker Products OE line is backed by the company’s long history in engine management and fuel system components since 1946.