Bosch 13989 Oxygen Sensor - Downstream

Reliable Oxygen Sensor for Toyota Tacoma

The Bosch Engineered Oxygen Sensor 13989 is designed specifically for Toyota Tacoma models, providing accurate air-fuel mixture readings to optimize engine performance and reduce emissions. This narrow-band heated oxygen sensor ensures precise monitoring for emission control systems.

Key Features of Bosch Engineered Oxygen Sensor 13989

• Specific fit for Toyota Tacoma vehicles
• Narrow-band heated oxygen sensor type for accurate readings
• 33.7-inch wiring harness length with 4 wires and blade terminals
• Durable metal housing with steel finish and flange mounting type
• Includes wiring harness and features a 22 mm hex size for installation
• Thread diameter and size of 18 mm for secure fitment
• Connector is male with a rectangular shape and 4 terminals
• Standard replacement grade for reliable performance

About the Bosch Engineered Oxygen Sensor Product Line

The Bosch Engineered Oxygen Sensor line focuses on delivering precise emission control components tailored to specific vehicle applications. This product line emphasizes quality materials and design, such as heated sensors and exact fitment specifications, to maintain optimal engine efficiency and comply with emission standards. The 13989 sensor exemplifies this approach by offering a direct fit and reliable operation for Toyota Tacoma models.

Detailed Product Description

This Bosch oxygen sensor features a narrow-band heated design, which allows it to quickly reach operating temperature and provide accurate oxygen level readings to the engine control unit. The sensor’s metal housing and steel finish ensure durability under harsh engine conditions. With a 33.7-inch wiring harness and 4-wire configuration, it supports stable electrical connections through blade terminals and a rectangular male connector. The flange mounting type and 18 mm thread diameter provide a secure and precise installation. The overall length of 37 inches and a sealing surface to connector length of 35.8 inches accommodate the specific layout of Toyota Tacoma exhaust systems.

Common Issues Addressed by This Oxygen Sensor

• Engine performance problems due to incorrect air-fuel mixture
• Increased emissions and failed emissions tests
• Check engine light triggered by faulty oxygen sensor readings
• Poor fuel economy caused by inefficient combustion
• Rough idling or hesitation during acceleration

Installation Notes and Tips

• Ensure vehicle compatibility with Toyota Tacoma models before installation
• Use a 22 mm oxygen sensor socket for removal and installation
• Do not overtighten the sensor; follow torque specifications for 18 mm thread size
• Inspect wiring harness and connector for damage before installation
• Replace sensor when engine is cool to avoid burns and damage

Quality Assurance and Warranty

The Bosch Engineered Oxygen Sensor 13989 is manufactured to meet OEM standards for fit, form, and function. It is constructed with high-quality materials to withstand engine heat and contaminants. While specific warranty details may vary, Bosch typically offers a limited warranty covering defects in materials and workmanship to ensure product reliability.