Bosch 15323 Oxygen Sensor - Upstream Left

Reliable Oxygen Sensor for Mazda 626 Emission Control

The Bosch Validated Oxygen Sensor part number 15323 is designed specifically for the Mazda 626, ensuring precise emission control and optimal engine performance. This narrow-band heated oxygen sensor provides accurate air-fuel mixture readings to help maintain your vehicle’s emission standards.

• Specific fit for Mazda 626 models
• Narrow-band heated oxygen sensor type
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• 20.9-inch wiring harness length with 4 wires and blade terminal type
• Durable metal housing with steel finish
• Includes wiring harness and male round connector
• Standard replacement grade for reliable performance

About the Bosch Validated Oxygen Sensor Line

The Bosch Validated Oxygen Sensor line is engineered to meet strict quality and performance standards, providing a direct replacement for original equipment sensors. This product line focuses on delivering precise sensor readings and durability, which are critical for maintaining emission control systems. The 15323 sensor is part of this line, ensuring compatibility and reliability for Mazda 626 vehicles.

Product Details and Specifications

This Bosch oxygen sensor features a narrow-band heated design, which allows for faster sensor response and improved fuel efficiency. The sensor’s threaded mounting type with an 18 mm thread diameter and 22 mm hex size ensures secure installation. The wiring harness is 20.9 inches long and includes four wires with blade terminals, connecting via a male round connector. The sensor’s metal housing and steel finish provide durability under high-temperature conditions. Overall length measures 22.2 inches, with a 21.1-inch length from sealing surface to connector end.

Common Applications and Issues Addressed

• Helps correct engine misfires caused by faulty oxygen sensors
• Improves fuel economy by providing accurate air-fuel ratio data
• Reduces harmful emissions to meet regulatory standards
• Prevents check engine light triggers related to oxygen sensor faults
• Supports smooth engine idling and acceleration performance

Installation Notes and Tips

When installing the Bosch Validated Oxygen Sensor 15323 on a Mazda 626, ensure the engine is cool to avoid burns. Use a 22 mm oxygen sensor socket for removal and installation. Verify the wiring harness connections match the original sensor’s terminals and connector shape. No mounting bracket is included, so use the existing mounting point. Proper torque on the threaded sensor is essential to prevent exhaust leaks.

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet OEM specifications, ensuring reliable performance and durability. This standard replacement grade sensor undergoes rigorous testing for accuracy and longevity. While specific warranty details are not provided here, Bosch typically offers limited warranties on their emission control sensors to cover manufacturing defects.