Bosch 13964 Oxygen Sensor - Upstream

Reliable Oxygen Sensor for Mazda 626

The Bosch Engineered Oxygen Sensor 13964 is designed specifically for the Mazda 626, providing accurate air-fuel mixture readings to optimize engine performance and reduce emissions. This narrow-band heated oxygen sensor ensures precise monitoring for emission control systems.

• Specific fit for Mazda 626 models
• Heated narrow-band oxygen sensor for faster response
• Threaded mounting type with 18 mm thread diameter
• 9.3-inch wiring harness length with connector included
• Standard replacement grade with metal housing and steel finish
• 3-pin female connector with rectangular shape
• Overall length of 13 inches for proper installation
• Compatible with Bosch Engineered Oxygen Sensor product line

About the Bosch Engineered Oxygen Sensor Line

The Bosch Engineered Oxygen Sensor line focuses on delivering precise and reliable emission control components tailored to specific vehicle applications. The 13964 oxygen sensor is part of this line, engineered to meet OEM specifications for the Mazda 626. It features a heated narrow-band sensor design that supports efficient combustion and emission regulation.

Product Details and Specifications

This Bosch oxygen sensor features a 3-wire configuration with a 3-pin female terminal connector shaped in a rectangle, ensuring secure and accurate electrical connections. The sensor is heated to provide quicker activation and more consistent readings under various operating conditions. Its metal housing with a steel finish offers durability and resistance to harsh engine environments. The threaded mounting type with an 18 mm diameter and 22 mm hex size allows for straightforward installation and removal. The wiring harness length of 9.3 inches and overall length of 13 inches provide sufficient reach for proper placement in the exhaust system.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for Mazda 626 emission systems
• Helps resolve rough idling and poor fuel economy caused by faulty sensors
• Reduces engine misfires related to incorrect air-fuel mixture readings
• Supports emission compliance by maintaining proper exhaust gas monitoring
• Prevents check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

When installing the Bosch Engineered Oxygen Sensor 13964, ensure the vehicle is cool to avoid burns. Use a 22 mm oxygen sensor socket for removal and installation. Verify the connector orientation matches the factory wiring harness to prevent connection issues. The threaded sensor should be tightened to manufacturer torque specifications to avoid leaks or damage. Since this sensor is a specific fit for the Mazda 626, confirm vehicle compatibility before installation.

Quality Assurance and Warranty

Bosch Engineered Oxygen Sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. This sensor is a standard replacement grade part designed to meet OEM specifications. While specific warranty details are not provided here, Bosch typically offers limited warranties on their emission control components. Refer to Bosch or the product documentation for exact warranty terms.