Bosch 15427 Oxygen Sensor - Upstream or Upstream Right

Reliable Oxygen Sensor for Mazda 6 and Millenia

The Bosch Engineered Oxygen Sensor 15427 is designed specifically for select Mazda models, including the Mazda 6 and Millenia. This narrow-band heated oxygen sensor ensures accurate emissions control and optimal engine performance by precisely monitoring exhaust gases.

• Specific fit for Mazda 6 and Millenia models
• Narrow-band heated oxygen sensor type for precise readings
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Includes a 22.1-inch wiring harness with 4 wires and a male rectangular connector
• Durable metal housing finished in steel for long-lasting use
• Standard replacement grade for reliable performance

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 15427 sensor is part of this line, offering a heated narrow-band sensor designed to meet OEM specifications for Mazda vehicles. This ensures compatibility and consistent sensor performance in emission systems.

Product Details and Specifications

This oxygen sensor features a threaded mounting type with an 18 mm thread diameter and a 22 mm hex size for installation using standard tools. The sensor is heated, which helps it reach operating temperature quickly for accurate readings. It includes a 22.1-inch wiring harness with four wires and a male rectangular connector with four blade terminals, ensuring a secure and proper electrical connection. The sensor housing is made of metal with a steel finish, providing durability under harsh engine conditions. The overall length of the sensor is 25.8 inches, with a sealing surface to connector length of 24.6 inches, making it suitable for the specified Mazda models.

Common Applications and Issues Addressed

• Replacement for faulty or failing oxygen sensors in Mazda 6 and Millenia
• Helps resolve poor fuel economy caused by incorrect air-fuel mixture readings
• Addresses rough engine idle or hesitation due to inaccurate exhaust gas data
• Reduces emissions by ensuring proper sensor feedback to the engine control unit
• Prevents check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

When installing the Bosch Engineered Oxygen Sensor 15427, ensure the vehicle is cool to avoid burns. Use a 22 mm oxygen sensor socket or wrench for removal and installation. Verify the wiring harness length and connector type match the vehicle’s original sensor to avoid electrical issues. Thread the sensor carefully to prevent cross-threading and torque to manufacturer specifications. No mounting bracket is included, so use the existing mounting point on the vehicle.

Quality Assurance and Warranty

This Bosch oxygen sensor is manufactured to meet OEM standards for fit, form, and function. It is a standard replacement grade part designed for reliable operation in emission control systems. While specific warranty details are not provided here, Bosch products typically come with a limited warranty covering defects in materials and workmanship. Refer to Bosch or the parts distributor for exact warranty terms.