Bosch 13870 Oxygen Sensor - Upstream

Reliable Oxygen Sensor for Mazda Protege and Protege5

The Bosch Validated Oxygen Sensor part number 13870 is designed specifically for Mazda Protege and Protege5 models. This narrow-band heated oxygen sensor ensures accurate emission control and optimal engine performance by monitoring exhaust gases precisely.

• Specific fit for Mazda Protege and Protege5
• Heated narrow-band oxygen sensor for efficient operation
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• 4-wire configuration with a 6.9-inch wiring harness length
• Durable metal housing with a steel finish
• Female rectangular connector with 4 terminals
• Overall length of 10.6 inches for proper fitment
• Standard replacement grade type with included wiring harness

About the Bosch Validated Oxygen Sensor Line

The Bosch Validated Oxygen Sensor line offers sensors that meet strict quality and performance standards. These sensors are engineered to provide reliable emission control and accurate air-fuel mixture readings. The 13870 sensor is part of this line, ensuring compatibility and durability for specific vehicle applications like the Mazda Protege and Protege5.

Product Details and Specifications

This Bosch oxygen sensor features a narrow-band heated design, which allows it to reach operating temperature quickly for precise exhaust gas measurement. The sensor includes a 4-wire setup with a female rectangular connector and pin-type terminals, facilitating secure electrical connections. Its threaded mounting type with an 18 mm diameter and 22 mm hex size ensures straightforward installation. The sensor's metal housing and steel finish provide resistance to heat and corrosion, supporting long-term durability. The wiring harness length of 6.9 inches and overall length of 10.6 inches are optimized for the Mazda Protege and Protege5 fitment.

Common Applications and Issues Addressed

• Helps maintain proper air-fuel ratio for efficient combustion
• Reduces harmful emissions by providing accurate oxygen level data
• Prevents engine performance issues related to faulty sensors
• Resolves check engine light triggers caused by oxygen sensor faults
• Supports smooth engine idling and improved fuel economy

Installation Notes and Tips

When installing the Bosch Validated Oxygen Sensor 13870, ensure the vehicle is cool to avoid burns. Use a 22 mm oxygen sensor socket for removal and installation. Verify the sensor’s wiring harness and connector match the vehicle’s factory harness to avoid electrical issues. Thread the sensor carefully to prevent cross-threading and tighten to manufacturer torque specifications. No mounting bracket is included, so use the existing mounting point on the exhaust system.

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet OEM standards for fit, form, and function. The Bosch Validated Oxygen Sensor 13870 undergoes rigorous testing to ensure reliable performance in emission control systems. This part is a standard replacement grade sensor designed for durability and consistent operation. Warranty coverage details should be confirmed with the point of purchase or Bosch directly.