Bosch 15523 Oxygen Sensor - Downstream Left

Reliable Oxygen Sensor for Nissan and INFINITI Vehicles

The Bosch Validated Oxygen Sensor 15523 is designed specifically for select Nissan and INFINITI models, including the 350Z, FX35, FX45, G35, M35, and M45. This narrow-band heated oxygen sensor ensures accurate emission control and optimal engine performance by precisely monitoring exhaust gases.

• Specific fit for Nissan and INFINITI 350Z, FX35, FX45, G35, M35, M45
• Heated narrow-band oxygen sensor for improved response time
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• 12.3-inch wiring harness length with 4-wire blade terminals and male connectors
• Durable metal housing finished in steel for long-lasting use
• Standard replacement grade with universal wiring harness included

About the Bosch Validated Oxygen Sensor Line

The Bosch Validated Oxygen Sensor product line focuses on delivering precise and reliable emission control components that meet OEM specifications. This line is engineered to provide accurate air-fuel mixture readings, helping maintain compliance with emission standards and supporting engine efficiency. The 15523 sensor is part of this line, offering a specific fit and heated narrow-band technology tailored for Nissan and INFINITI vehicles.

Product Details and Specifications

This oxygen sensor features a 4-wire design with blade-type terminals and male connectors housed in a robust metal casing finished in steel. The sensor’s overall length is 15.7 inches, with a wiring harness length of 12.3 inches and a sealing surface to connector length of 14.6 inches, ensuring proper installation and connectivity. The threaded mounting type uses an 18 mm diameter thread and a 22 mm hex size for secure attachment. The sensor is heated to provide faster response times and more accurate readings under various operating conditions.

Common Applications and Problem Solving

• Restores accurate oxygen sensing for Nissan 350Z and INFINITI G35 engines
• Resolves engine performance issues related to faulty oxygen sensors
• Helps correct rough idling and poor fuel economy caused by sensor failure
• Supports emission control system compliance and reduces exhaust emissions
• Eliminates check engine light triggers related to oxygen sensor faults

Installation Notes and Tips

Ensure the vehicle is cool before installation to avoid burns. Use a 22 mm oxygen sensor socket for removal and installation. Verify the sensor’s wiring harness length and connector type match the vehicle’s factory specifications. The threaded mounting requires proper torque to avoid damage. No mounting bracket is included, so use the existing mounting point on the exhaust system. The sensor is a specific fit for Nissan and INFINITI models listed, so confirm compatibility before installation.

Quality Assurance and Warranty

The Bosch Validated Oxygen Sensor 15523 is manufactured to meet OEM standards for fit, form, and function. It includes a wiring harness and is designed for standard replacement applications. Bosch products typically come with a limited warranty covering defects in materials and workmanship; please refer to Bosch’s official warranty policy for details.