Walker 250-54052 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Walker Products OE Oxygen Sensor

Walker Products OE 250-54052 is a heated oxygen sensor built for specific upstream applications on select Toyota trucks and SUVs. It is engineered to deliver the ECU feedback needed for proper fuel control and emissions monitoring on vehicles such as the Toyota Tacoma, Tundra, and 4Runner.

Walker Products OE focuses on original-equipment-style replacement sensors for exact fitment and position-specific performance. Part number 250-54052 is matched to the listed upstream locations and uses a 4-wire heated design with a male radiused polygon connector.

Key Features

• Heated oxygen sensor for upstream placement
• Specific fit design for listed Toyota applications
• 4-wire configuration with 20-gauge wiring
• Male connector with radiused polygon shape
• 18.0 mm thread diameter and flange mount design
• Wiring harness length: 14.09 in.; overall length: 17.64 in.
• Walker Products OE 250-54052 for direct replacement use

Detailed Description

This Walker Products oxygen sensor is built for upstream monitoring on 1999-2004 Toyota 4Runner, 2000-2004 Toyota Tacoma, and 2000-2004 Toyota Tundra applications listed below. It is designed to provide the diagnostic feedback the engine control unit relies on for air-fuel management, helping maintain proper engine operation and emissions performance. If the original sensor has failed, the vehicle may store fault codes and show drivability or emissions-related symptoms.

Walker Products OE 250-54052 is a fitment-specific replacement for Toyota Tacoma upstream oxygen sensor service, Toyota Tundra upstream oxygen sensor replacement, and Toyota 4Runner upstream oxygen sensor applications. The part number 250-54052 should be matched to the exact position shown in the fitment list, including upstream left and upstream right locations on certain 2000 Tundra models.

What It Helps Address

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

Installation Notes and Tips

• Verify the exact year, model, and upstream position before ordering.
• Inspect the sensor wiring harness and connector for heat damage, corrosion, or physical wear before installation.
• Confirm thread diameter, connector style, and harness length match the original part.
• Use the listed fitment for Toyota Tacoma, Toyota Tundra, and Toyota 4Runner applications only.

Quality Assurance

Walker Products OE sensors are developed as original-equipment-style replacements for specific vehicle applications and positions. The brand has long-standing experience in engine management and oxygen sensor manufacturing, with ISO 9001/TS 16949 certified operations supporting product consistency.