Bosch 13644 Oxygen Sensor - Downstream

Reliable Oxygen Sensor for Lexus IS300 Emission Control

The Bosch Engineered Oxygen Sensor 13644 is designed specifically for the Lexus IS300, ensuring precise air-fuel mixture readings to optimize engine performance and reduce emissions. This narrow-band heated oxygen sensor offers a direct fit replacement with durable construction and integrated wiring harness for straightforward installation.

• Specific fit for Lexus IS300 models
• Heated narrow-band oxygen sensor for accurate emissions control
• 33.7-inch wiring harness length with 4 wires and blade terminals
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Durable metal housing finished in steel for long-lasting use
• Includes wiring harness with male rectangular connector
• Standard replacement grade for reliable performance

About the Bosch Engineered Oxygen Sensor Line

The Bosch Engineered Oxygen Sensor line focuses on delivering precise sensor technology tailored to specific vehicle applications. This product line emphasizes compatibility and quality, providing sensors that meet OEM specifications for fit and function. The 13644 oxygen sensor is part of this line, engineered to maintain optimal engine efficiency and emissions compliance for the Lexus IS300.

Product Details and Specifications

This oxygen sensor features a narrow-band heated design, which allows it to quickly reach operating temperature and provide accurate oxygen level readings. The sensor includes a 33.7-inch wiring harness with four wires and blade-type terminals, ensuring secure electrical connections. The connector is a male rectangular type with four terminals, matching the original equipment configuration. The sensor mounts via a threaded 18 mm diameter fitting and uses a 22 mm hex size for installation. Constructed with a metal housing finished in steel, it offers durability under harsh engine conditions. The overall length of the sensor is 37 inches, with a sealing surface to connector length of 35.8 inches, facilitating proper fitment in the exhaust system.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for Lexus IS300
• Helps resolve engine performance issues related to faulty oxygen sensors
• Reduces emissions by ensuring proper catalytic converter function
• Eliminates check engine light triggers caused by sensor failure
• Improves fuel efficiency by providing correct sensor data to the ECU

Installation Notes and Tips

Installation requires removing the old oxygen sensor and threading the Bosch 13644 sensor into the exhaust port. Use a 22 mm oxygen sensor socket for proper tightening. Ensure the wiring harness is routed away from hot exhaust components to prevent damage. The sensor’s heated design allows for quicker activation, but verify electrical connections match the original sensor’s male rectangular connector with four terminals. No mounting bracket is included, so use the existing mounting points on the vehicle.

Quality Assurance and Warranty

The Bosch Engineered Oxygen Sensor 13644 is manufactured to meet OEM standards for fit, form, and function. It is constructed with high-quality materials including a metal housing and durable wiring harness. While specific warranty details are not provided here, Bosch products typically come with a limited warranty covering defects in materials and workmanship. Refer to Bosch or the product documentation for exact warranty terms.