Bosch 15355 Oxygen Sensor - Upstream Left

Overview of Bosch Actual OE Oxygen Sensor 15355

The Bosch Actual OE Oxygen Sensor 15355 is designed specifically for the INFINITI QX4, ensuring precise emission control and optimal engine performance. This narrow-band heated oxygen sensor provides accurate air-fuel mixture readings to help maintain your vehicle’s emission standards.

• Specific fit for INFINITI QX4 models
• Heated narrow-band oxygen sensor for reliable operation
• Threaded mounting type with 18 mm thread diameter
• Includes a 23.3-inch wiring harness with a round male connector
• Standard replacement grade with metal housing and steel finish
• Connector features 4 female terminals and 3 wires
• Overall length of 27 inches and sealing surface to connector length of 37 inches
• Hex size of 22 mm for installation

About the Bosch Actual OE Oxygen Sensor Product Line

The Bosch Actual OE Oxygen Sensor line is engineered to meet original equipment specifications, providing a direct replacement for factory-installed sensors. This ensures compatibility and performance consistency for vehicles like the INFINITI QX4. The 15355 part number belongs to this line, offering a standard replacement sensor with a heated element to support quicker sensor response and improved emission control.

Detailed Product Description

This Bosch oxygen sensor features a narrow-band design with heating capability, which allows it to reach operating temperature faster and provide accurate oxygen level readings. The sensor’s metal housing and steel finish contribute to durability under high-temperature conditions. The threaded mounting type with an 18 mm diameter and 22 mm hex size facilitates straightforward installation. The wiring harness is 23.3 inches long and includes a round male connector with 4 female terminals and 3 wires, ensuring a secure electrical connection. The overall length of 27 inches and the 37-inch length from sealing surface to connector end accommodate proper fitment in the INFINITI QX4’s exhaust system.

Common Applications and Issues Addressed

• Restores accurate air-fuel ratio readings for emission control
• Helps resolve check engine light triggers related to oxygen sensor faults
• Improves fuel efficiency by providing correct sensor data to the engine control unit
• Reduces harmful exhaust emissions by maintaining proper combustion
• Prevents engine performance issues caused by faulty oxygen sensors

Installation Notes and Tips

• Ensure the vehicle is cool before sensor removal to avoid burns
• Use a 22 mm oxygen sensor socket for proper installation and removal
• Verify the sensor’s wiring harness length and connector type match the vehicle’s harness
• Do not overtighten the sensor; follow manufacturer torque specifications
• Check for exhaust leaks around the sensor mounting area after installation

Quality Assurance and Warranty

Bosch oxygen sensors are manufactured to meet strict quality standards and undergo rigorous testing to ensure reliability and durability. The Actual OE Oxygen Sensor 15355 is a standard replacement part designed to match OEM specifications for the INFINITI QX4. While specific warranty details are not provided here, Bosch typically offers limited warranties on their emission control sensors to cover defects in materials and workmanship.