Walker 350-33003 Oxygen Sensor - Upstream, Upstream Left or Upstream Right

Overview of Walker 350-33003 Oxygen Sensor

The Walker 350-33003 oxygen sensor is a heated, threaded sensor designed specifically for select Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models. This sensor ensures accurate emission control by monitoring oxygen levels in the exhaust system, helping maintain optimal engine performance and emissions compliance.

• Heated oxygen sensor for faster response times
• Specific fit for multiple GM vehicles including Chevrolet Blazer and GMC Yukon
• Threaded mounting type with 18.0 mm thread diameter
• 10.35-inch wiring harness length with 3 wires of 20 gauge
• Radiused polygon male connector for secure connection
• Overall length of 13.9 inches for proper installation depth

Detailed Product Description

This Walker Products Aftermarket oxygen sensor (part number 350-33003) is engineered to meet the exact specifications of various GM vehicles such as the Chevrolet Astro, GMC Jimmy, and Pontiac Grand Prix. Featuring a heated sensor element, it reduces the time needed for the sensor to reach operating temperature, improving fuel efficiency and reducing emissions during cold starts. The sensor’s 3-wire design and 20 gauge wiring ensure reliable signal transmission, while the radiused polygon male connector provides a secure and precise fit. The threaded mounting type with an 18.0 mm diameter allows for straightforward installation in the exhaust manifold or pipe.

Compatible Vehicles and Applications

This oxygen sensor is compatible with a range of Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models, including but not limited to:

• Chevrolet Blazer, Astro, S10, and Corvette
• GMC Yukon, Jimmy, Safari, and C1500 Suburban
• Buick Regal and Oldsmobile Cutlass Supreme
• Pontiac Grand Prix and Firebird

Common Issues Addressed by This Oxygen Sensor

• Check engine light triggered by faulty oxygen sensor readings
• Poor fuel economy due to incorrect air-fuel mixture
• Increased emissions and failed emissions tests
• Engine hesitation or rough idling caused by sensor malfunction
• Delayed sensor response affecting engine performance

Installation Notes and Tips

When installing the Walker 350-33003 oxygen sensor, ensure the engine and exhaust system are cool to avoid burns. Use an oxygen sensor socket or appropriate wrench to remove the old sensor carefully. Verify the connector type matches the vehicle harness before installation. The 10.35-inch wiring harness length provides flexibility for routing, but avoid sharp bends or contact with hot exhaust components. Thread the sensor carefully to avoid cross-threading and torque to manufacturer specifications.

Quality Assurance and Warranty

Walker Products Aftermarket parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 350-33003 oxygen sensor undergoes rigorous testing to ensure durability and reliable performance in emission control systems. While specific warranty details are not provided here, Walker typically offers limited warranties on their aftermarket sensors to cover defects in materials and workmanship.