Bosch 13770 Oxygen Sensor - Downstream

Reliable Oxygen Sensor for Mazda 3 Vehicles

The Bosch Validated Oxygen Sensor part number 13770 is designed specifically for Mazda 3 models, providing accurate emissions control and engine performance monitoring. This narrow-band heated oxygen sensor ensures precise air-fuel mixture readings to help maintain optimal engine efficiency.

• Specific fit for Mazda 3 vehicles
• Heated narrow-band oxygen sensor for faster response
• Threaded mounting type with 18 mm thread diameter
• 29.3-inch wiring harness length with 4-pin rectangular female connector
• Durable metal housing with steel finish
• Standard replacement grade for reliable performance
• Includes wiring harness for easy installation

About the Bosch Validated Oxygen Sensor Line

The Bosch Validated Oxygen Sensor product line focuses on delivering sensors that meet strict quality and performance standards. These sensors are engineered to provide accurate and consistent readings, ensuring compliance with emissions regulations. The 13770 oxygen sensor is part of this line, offering a specific fit and reliable heated narrow-band sensing technology tailored for Mazda 3 applications.

Detailed Product Features and Specifications

This Bosch oxygen sensor features a 4-wire design with a 4-pin female connector in a rectangular shape, facilitating secure and precise electrical connections. The sensor’s heated element allows it to reach operating temperature quickly, improving response time and reducing emissions during cold starts. The threaded mounting type with an 18 mm thread diameter and 22 mm hex size ensures compatibility with factory mounting points. The sensor’s overall length is 32.7 inches, with a wiring harness length of 29.3 inches, providing sufficient reach for installation. Constructed with a metal housing and steel finish, this sensor is built for durability and long-term use.

Common Applications and Issues Addressed

• Helps maintain proper air-fuel ratio for efficient combustion
• Reduces engine misfires and rough idling caused by faulty sensors
• Prevents increased emissions and failed emissions tests
• Improves fuel economy by providing accurate oxygen level data
• Supports engine control unit (ECU) in optimizing performance

Installation Notes and Tips

When installing the Bosch Validated Oxygen Sensor 13770 on a Mazda 3, ensure the engine is cool to avoid burns. Use the 22 mm hex size for proper tightening without damaging the sensor. Verify the 4-pin female connector matches the vehicle’s wiring harness and secure the wiring to prevent strain. No mounting bracket is included, so use the factory mounting location. Confirm the sensor’s wiring harness length of 29.3 inches is sufficient for your vehicle’s routing.

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet OEM standards, ensuring reliable performance and durability. The Bosch Validated Oxygen Sensor 13770 undergoes rigorous testing to comply with emissions control requirements. This part is a standard replacement grade sensor designed to maintain your Mazda 3’s emission system integrity. Warranty details are provided by Bosch and typically cover defects in materials and workmanship.