Walker 350-33042 Oxygen Sensor - Upstream Front or Upstream Rear

Overview of Walker Oxygen Sensor for Mazda Millenia

The Walker 350-33042 oxygen sensor is designed specifically for Mazda Millenia models, ensuring precise emission control and optimal engine performance. This heated oxygen sensor features a threaded mounting type and a radiused polygon male connector for secure installation.

• Wiring harness length: 18.43 inches
• Wire gauge measurement: 20 gauge
• Heated sensor type for faster response
• Specific fit for Mazda Millenia
• Three-wire configuration with radiused polygon male connector
• Thread diameter: 18.0 mm
• Overall length: 21.97 inches
• Threaded mounting for reliable attachment

Detailed Product Description

This Walker oxygen sensor (part number 350-33042) is engineered to meet the emission control requirements of Mazda Millenia vehicles. The heated sensor type allows for quicker warm-up times, improving fuel efficiency and reducing emissions shortly after engine start. The sensor’s three-wire design includes a radiused polygon male connector, which ensures a secure and precise electrical connection. With an 18.43-inch wiring harness and an overall length of 21.97 inches, this sensor is tailored for a specific fit, avoiding compatibility issues common with universal sensors. The 18.0 mm thread diameter and threaded mounting type provide a stable and leak-free installation.

Walker Products Aftermarket Line

The Walker Products Aftermarket line focuses on delivering reliable emission control components that meet or exceed OEM specifications. This oxygen sensor is part of that line, offering a balance of durability and performance tailored for specific vehicle applications like the Mazda Millenia. The product line emphasizes precise fitment and quality materials to support emission standards compliance.

Common Applications and Issues Addressed

• Replacement for faulty or failing oxygen sensors in Mazda Millenia
• Helps resolve rough idling and poor fuel economy
• Reduces engine hesitation and misfires related to sensor malfunction
• Supports emission system diagnostics and compliance
• Prevents check engine light triggers caused by sensor errors

Installation Notes and Tips

• Ensure the vehicle is cool before sensor removal to avoid burns
• Use appropriate oxygen sensor socket for removal and installation
• Verify connector type matches the vehicle harness (radiused polygon male)
• Apply anti-seize compound on threads if not pre-coated
• Torque sensor to manufacturer specifications to prevent leaks

Quality Assurance and Warranty

Walker oxygen sensors undergo rigorous testing to meet emission control standards and ensure durability under normal operating conditions. The 350-33042 sensor is manufactured to provide consistent performance and fitment for Mazda Millenia vehicles. Warranty details are provided by Walker Products Aftermarket and typically cover defects in materials and workmanship under normal use.