Bosch 15522 Oxygen Sensor - Downstream Right

Bosch Oxygen Sensor for Nissan and INFINITI

Bosch Engineered Oxygen Sensor 15522 is a direct-fit, heated narrow-band O2 sensor built for downstream monitoring on select Nissan and INFINITI applications. It delivers air-fuel-ratio feedback to the ECU for stable combustion control and emissions management across changing operating conditions.

With OE-developed ceramic sensing elements, optimized heater control, and high-temperature-resistant materials, Bosch 15522 is built for consistent signal response in demanding exhaust environments. This Bosch Engineered Oxygen Sensor line reflects Bosch’s long OE development history and is designed for accurate replacement on vehicles such as the Nissan Maxima, Nissan 350Z, and INFINITI G35.

Key Features

• Direct-fit oxygen sensor with specific vehicle application
• Heated narrow-band design for faster closed-loop operation
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• 4-wire harness with blade terminals and square connector
• Wiring harness included for a cleaner replacement installation
• Metal housing with steel finish for underbody exhaust service
• OE-style Bosch engineering for precise sensor output

Detailed Product Overview

Bosch 15522 is a switching-type oxygen sensor that measures exhaust oxygen content and sends the signal to the engine control unit. That feedback helps the ECU maintain the proper air-fuel ratio, which is important for downstream emissions monitoring and consistent engine operation. This part number is a direct-fit replacement for select 2002-2010 Nissan and INFINITI vehicles, including downstream right, downstream rear, downstream, and downstream left positions depending on the application.

This part cross-references 226A0AM601 for the same application. Bosch 15522 is a practical choice for drivers servicing a Nissan Quest oxygen sensor, Nissan Maxima downstream O2 sensor, or INFINITI FX35/FX45/G35 downstream oxygen sensor replacement.

Common Issues This Part Can Address

• Fault codes related to oxygen sensor response or heater circuit performance
• Rough idle or inconsistent fuel control caused by inaccurate exhaust feedback
• Failed emissions inspection tied to a worn downstream sensor
• Reduced closed-loop fuel control after sensor aging or contamination
• Check engine light concerns associated with O2 sensor degradation

Installation Notes and Tips

Confirm the connector shape, wire count, mounting thread size, and sensor position before installation. Bosch 15522 uses a threaded mount, 4-wire configuration, and a square male connector with male blade terminals. Because this is a direct-fit oxygen sensor, match the vehicle year, make, model, and listed downstream position exactly to the fitment data before replacing the original unit.

For best results, inspect the exhaust bung threads and wiring routing before installation, and verify the harness reaches the factory connector without strain. This part is listed for 2003-2006 INFINITI G35, downstream right; 2004-2007 Nissan Maxima, downstream; and 2005-2009 Nissan Quest, downstream rear, among other confirmed applications.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development behind this replacement part. The sensor uses advanced ceramic elements, controlled heating, and heat-resistant construction to support stable operation under thermal and vibration load. Bosch Engineered Oxygen Sensor 15522 is built to OE-style standards for accurate fitment and dependable signal performance.