Bosch 13938 Oxygen Sensor - Upstream Left or Upstream Right

Reliable Oxygen Sensor for Acura Legend, NSX, RL, and TL

The Bosch Engineered Oxygen Sensor 13938 is designed specifically for select Acura models, including the Legend, NSX, RL, and TL. This narrow-band heated oxygen sensor ensures accurate air-fuel mixture readings to support optimal engine performance and emissions control.

• Specific fit for Acura Legend, NSX, RL, and TL models
• Heated narrow-band oxygen sensor for precise emissions monitoring
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Includes a 20.7-inch wiring harness with a 4-wire blade terminal connector
• Durable metal housing finished in steel for long-lasting use
• Connector features a rectangular male design with 4 terminals
• Overall length of 24 inches with 22.8-inch sealing surface to connector length
• Standard replacement grade for reliable performance

About the Bosch Engineered Oxygen Sensor Line

The Bosch Engineered Oxygen Sensor line focuses on delivering precise and reliable emission control components tailored to specific vehicle applications. The 13938 sensor is part of this line, offering a heated narrow-band sensor designed to meet OEM specifications for Acura vehicles. This ensures compatibility and consistent performance in monitoring exhaust gases to maintain emission standards.

Product Details and Specifications

This oxygen sensor features a threaded mounting type with an 18 mm thread diameter and a 22 mm hex size for installation using standard tools. The sensor is heated, which helps it reach operating temperature quickly for accurate readings. It includes a 20.7-inch wiring harness with a 4-wire blade terminal connector, designed with a rectangular male connector housing. The sensor's metal housing finished in steel provides durability against harsh engine conditions. The overall length of the sensor is 24 inches, with 22.8 inches measured from the sealing surface to the end of the connector, ensuring proper fitment in the exhaust system.

Common Applications and Issues Addressed

• Replacement for faulty or failing oxygen sensors in Acura Legend, NSX, RL, and TL
• Helps resolve engine performance issues related to incorrect air-fuel mixture
• Reduces emissions by providing accurate exhaust gas readings to the engine control unit
• Prevents check engine light triggers caused by sensor malfunctions
• Supports fuel efficiency by maintaining proper combustion control

Installation Notes and Tips

Ensure the vehicle is cool before beginning installation to avoid burns. Use a 22 mm oxygen sensor socket or wrench for removal and installation. Verify the sensor's wiring harness length and connector type match the vehicle's factory specifications. Avoid damaging the sensor's wiring during installation. Thread the sensor carefully to prevent cross-threading. No mounting bracket is included, so use the existing mounting point on the vehicle.

Quality Assurance and Warranty

The Bosch Engineered Oxygen Sensor 13938 is manufactured to meet OEM standards for fit, form, and function. It is a standard replacement grade sensor designed for reliable operation in emission control systems. Bosch products typically come with a limited warranty; please refer to Bosch or the vehicle manufacturer for specific warranty details related to this part.