Bosch 13720 Oxygen Sensor - Downstream or Downstream Left

Reliable Oxygen Sensor for Lexus, Toyota, and Scion Vehicles

The Bosch Engineered Oxygen Sensor 13720 is designed to provide accurate air-fuel mixture readings for improved engine performance and emissions control. This specific fit oxygen sensor is compatible with various Lexus, Toyota, and Scion models, ensuring precise operation and durability.

• Part Number: 13720
• Compatible with Lexus, Toyota, and Scion models including Camry, Highlander, RX350, RX450h, Sienna, and more
• Narrow-band heated oxygen sensor for accurate emissions monitoring
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• 4-wire design with blade terminals and male connectors
• Wiring harness length of 8.5 inches and overall length of 11.8 inches
• Durable metal housing with steel finish
• Standard replacement grade for reliable performance
• Wiring harness included for straightforward installation

About the Bosch Engineered Oxygen Sensor Line

The Bosch Engineered Oxygen Sensor line focuses on delivering precise and reliable sensors tailored for specific vehicle applications. The 13720 oxygen sensor is part of this line, engineered to meet OEM specifications for Lexus, Toyota, and Scion models. Its narrow-band heated design helps maintain optimal engine efficiency and emissions control by providing accurate oxygen level readings to the engine control unit.

Product Details and Specifications

This Bosch oxygen sensor features a narrow-band heated sensor type with a 4-wire configuration, including blade terminals and male connectors for secure electrical connections. The sensor mounts via a threaded design with an 18 mm thread diameter and a 22 mm hex size, allowing for proper fitment and ease of installation. The wiring harness length is 8.5 inches, with an overall length of 11.8 inches, including a 10.6-inch length from the sealing surface to the end of the connector. The sensor housing is constructed from metal with a steel finish, providing durability under high-temperature conditions.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for improved fuel efficiency
• Helps resolve check engine light triggers related to oxygen sensor faults
• Reduces emissions by ensuring proper combustion monitoring
• Prevents rough idling and engine performance issues caused by faulty sensors
• Supports proper operation of the vehicle’s emission control system

Installation Notes and Tips

When installing the Bosch Engineered Oxygen Sensor 13720, ensure the vehicle is compatible with this specific fit sensor, including Lexus, Toyota, and Scion models such as Camry, Highlander, RX350, and others. Use the 22 mm hex size for removal and installation. The sensor’s threaded mounting type requires careful tightening to manufacturer torque specifications to avoid damage. The included wiring harness with blade terminals and male connectors simplifies electrical connections. It is recommended to inspect the wiring and connector for any damage before installation.

Quality Assurance and Warranty

Bosch Engineered Oxygen Sensors are manufactured to meet strict quality standards, ensuring reliable performance and durability. This standard replacement grade sensor undergoes rigorous testing to comply with OEM specifications. While specific warranty details are not provided here, Bosch typically offers coverage against manufacturing defects. Refer to Bosch or vehicle manufacturer guidelines for warranty information.