Walker 250-54073 Oxygen Sensor - Upstream Front

OE Oxygen Sensor for Toyota RAV4

Walker Products OE 250-54073 is a heated oxygen sensor built for specific vehicle applications and exact mounting positions. For 2001-2003 Toyota RAV4 models, this upstream front sensor helps the ECU monitor exhaust feedback near the exhaust manifold for proper engine management.

Key Features

• Specific-fit oxygen sensor for targeted application coverage
• Heated sensor design for faster operating response
• 4-wire configuration with 20-gauge wiring
• Male connector with radiused polygon shape
• Threaded mounting with 18.0 mm thread diameter
• Overall length: 16.85 in.; wiring harness length: 13.31 in.
• Walker Products OE line for OE-style replacement needs

Product Details

Walker Products OE 250-54073 is engineered as an OE replacement oxygen sensor for the 2001, 2002, and 2003 Toyota RAV4 in the upstream front position. The heated sensor design supports quicker feedback to the engine control unit, helping maintain accurate air-fuel monitoring and emissions control. Walker Products develops engine management sensors for application-specific fitment, so the connector, harness length, and threaded mounting style are matched to the intended installation point.

This part number, 250-54073, is a direct-fit solution for Toyota RAV4 upstream front oxygen sensor replacement service. If the original sensor has degraded, the vehicle may store fault codes and show drivability or emissions-related symptoms. This part cross-references no listed aftermarket part numbers for the same application.

What It Helps Address

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

Installation Notes

Install this sensor in the upstream front location on 2001-2003 Toyota RAV4 models only. Verify connector shape, wire length, and threaded mounting before installation. Inspect the sensor wiring harness and connector for heat damage, abrasion, or corrosion, since damaged wiring can shorten sensor life and affect signal quality. Use the vehicle’s service information for proper removal and torque procedures.

Quality Assurance

Walker Products OE sensors are developed as original-equipment-style replacements for specific applications and are backed by the company’s long-running focus on engine management and fuel system components. Walker Products is ISO 9001/TS 16949 certified and has supplied automotive components since 1946.