Bosch 13857 Oxygen Sensor - Downstream

Overview of Bosch Validated Oxygen Sensor 13857

The Bosch Validated Oxygen Sensor 13857 is designed specifically for Mazda Miata models, providing precise emission control and reliable performance. This narrow-band heated oxygen sensor ensures accurate air-fuel mixture readings to help maintain optimal engine efficiency.

• Compatible with Mazda Miata vehicles
• Part number 13857 for exact fitment
• Heated narrow-band oxygen sensor type
• Threaded mounting with 18 mm thread diameter
• Includes 17.1-inch wiring harness with 4 wires and blade terminals
• Rectangle-shaped male connector with 4 terminals
• Steel housing with 22 mm hex size for installation
• Overall length of 20.9 inches for proper fit

Detailed Product Description

The Bosch Validated Oxygen Sensor 13857 is engineered as a standard replacement part for emission control systems in Mazda Miata vehicles. Featuring a heated narrow-band sensor, it provides accurate oxygen level readings to the engine control unit, enabling precise fuel mixture adjustments. The sensor includes a 17.1-inch wiring harness with four wires and blade-type terminals, ensuring secure electrical connections. Its threaded mounting type with an 18 mm thread diameter and 22 mm hex size allows for straightforward installation. The sensor’s steel housing offers durability and resistance to harsh engine conditions. The connector is a male, rectangle-shaped design with four terminals, matching the original equipment specifications for a specific fit.

About the Bosch Validated Oxygen Sensor Line

The Bosch Validated Oxygen Sensor product line focuses on delivering reliable, vehicle-specific sensors that meet OEM standards. This line is designed to provide accurate emissions data and maintain engine performance by ensuring proper sensor function. The 13857 sensor is part of this line, offering a direct fit and compatibility with Mazda Miata models, which helps maintain emission compliance and engine efficiency.

Common Applications and Issues Addressed

• Restores proper air-fuel ratio readings for Mazda Miata engines
• Resolves check engine light triggers related to oxygen sensor faults
• Improves fuel economy by ensuring accurate sensor data
• Reduces harmful emissions by maintaining correct combustion
• Prevents engine performance issues caused by faulty oxygen sensors

Installation Notes and Tips

• Ensure vehicle compatibility with Mazda Miata models before installation
• Use a 22 mm wrench or socket for sensor removal and installation
• Handle the sensor carefully to avoid damaging the heated element
• Verify connector terminals match the original sensor for proper connection
• Check wiring harness length (17.1 inches) to confirm fit within engine bay

Quality Assurance and Warranty

The Bosch Validated Oxygen Sensor 13857 is manufactured to meet strict quality standards, ensuring reliable performance and durability. Bosch sensors undergo rigorous testing to comply with emission control requirements. While specific warranty details are not provided here, Bosch typically offers coverage against manufacturing defects. Refer to Bosch or your parts provider for exact warranty terms.