Bosch 15426 Oxygen Sensor - Downstream, Downstream Rear or Downstream Right

Reliable Oxygen Sensor for Mazda 6 and 626

The Bosch Validated Oxygen Sensor 15426 is designed specifically for Mazda 6 and Mazda 626 models, providing accurate air-fuel mixture readings to optimize engine performance and reduce emissions. This narrow-band heated oxygen sensor ensures precise monitoring of exhaust gases for efficient emission control.

• Specific fit for Mazda 6 and Mazda 626 vehicles
• Heated narrow-band oxygen sensor for fast response
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Includes a 21.8-inch wiring harness with 4 male blade terminals and a square male connector
• Durable metal housing finished in steel for long-lasting use
• Standard replacement grade for reliable performance

About the Bosch Validated Oxygen Sensor Line

The Bosch Validated Oxygen Sensor product line focuses on delivering sensors that meet strict validation standards for fit, form, and function. This ensures that the Bosch 15426 oxygen sensor integrates seamlessly with the vehicle’s emission control system, maintaining factory-level performance and compliance. The line emphasizes quality and compatibility, making it a dependable choice for Mazda 6 and 626 owners requiring a specific replacement sensor.

Product Details and Specifications

This Bosch oxygen sensor features a narrow-band heated sensor type, which allows for quicker warm-up times and more accurate oxygen level readings. The sensor is threaded with an 18 mm diameter and includes a 22 mm hex size for installation using standard tools. The wiring harness length is 21.8 inches, with four wires terminating in male blade terminals and a square male connector, ensuring a secure and precise electrical connection. The overall length from sealing surface to connector end is 24 inches, providing adequate reach for proper installation. The sensor housing is constructed from metal with a steel finish, offering durability under high-temperature exhaust conditions.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for Mazda 6 and 626
• Helps resolve engine performance issues related to faulty oxygen sensors
• Reduces emissions by ensuring proper fuel mixture control
• Prevents check engine light triggers caused by sensor failure
• Improves fuel efficiency by maintaining optimal combustion

Installation Notes and Tips

Installation requires a 22 mm wrench or oxygen sensor socket to remove and install the threaded sensor. Ensure the wiring harness is routed away from hot exhaust components to prevent damage. The Bosch 15426 sensor is a specific fit for Mazda 6 and 626 models, so verify vehicle compatibility before installation. No mounting bracket is included, as the sensor mounts directly into the exhaust system. Handle the sensor carefully to avoid damaging the heated element or wiring.

Quality Assurance and Warranty

The Bosch Validated Oxygen Sensor 15426 is manufactured to meet OEM specifications for Mazda vehicles, ensuring reliable operation and durability. Bosch provides a standard replacement grade sensor with quality materials and construction. While specific warranty details are not provided here, Bosch products typically come with a limited warranty covering defects in materials and workmanship.