Bosch 13859 Oxygen Sensor - Downstream

Reliable Oxygen Sensor for Kia Protege and Mazda Sephia

The Bosch Validated Oxygen Sensor 13859 is designed specifically for Kia Protege and Mazda Sephia models. This narrow-band heated oxygen sensor ensures accurate air-fuel mixture readings to support optimal engine performance and emissions control.

Key Features of Bosch Oxygen Sensor 13859

• Specific fit for Kia Protege and Mazda Sephia vehicles
• Heated narrow-band oxygen sensor for precise emissions monitoring
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• 4-wire design with blade terminals and a rectangular male connector
• Wiring harness length of 11.2 inches included for direct replacement
• Durable metal housing finished in steel for long-lasting use
• Overall length of 15 inches with 13.8 inches from sealing surface to connector end

About the Bosch Validated Oxygen Sensor Product Line

The Bosch Validated Oxygen Sensor line is engineered to meet strict OEM specifications, providing reliable sensor performance and compatibility. This product line focuses on delivering precise sensor readings and durability, making it suitable for emission control systems in specific vehicle applications like the Kia Protege and Mazda Sephia.

Detailed Product Description

The Bosch 13859 oxygen sensor is a standard replacement part designed to maintain your vehicle’s emission system efficiency. Featuring a heated narrow-band sensor type, it quickly reaches operating temperature to provide accurate oxygen level data to the engine control unit. The sensor’s 4-wire configuration with blade terminals and a rectangular male connector ensures secure electrical connections. Its threaded mounting type with an 18 mm diameter and 22 mm hex size allows for straightforward installation. The metal housing and steel finish contribute to the sensor’s durability under harsh engine conditions. With a wiring harness length of 11.2 inches and an overall length of 15 inches, this sensor fits precisely in the designated locations on Kia Protege and Mazda Sephia models.

Common Issues Addressed by This Oxygen Sensor

• Incorrect air-fuel mixture readings causing poor fuel economy
• Check engine light triggered by faulty oxygen sensor signals
• Increased vehicle emissions failing regulatory standards
• Engine performance problems such as rough idling or hesitation
• Failed emissions tests due to sensor malfunction

Installation Notes and Tips

Ensure the engine is cool before removing the old oxygen sensor to avoid burns. Use a 22 mm oxygen sensor socket for removal and installation. Verify the connector type matches the vehicle’s wiring harness to prevent electrical issues. Do not overtighten the sensor; follow torque specifications for the 18 mm threaded mounting. Inspect the wiring harness for damage before installation to ensure proper sensor function.

Quality Assurance and Warranty

The Bosch Validated Oxygen Sensor 13859 is manufactured to meet OEM standards for fit, form, and function. Bosch provides quality assurance through rigorous testing to ensure sensor reliability and durability. Please refer to Bosch’s official warranty policy for specific coverage details.