Bosch 18090 Oxygen Sensor - Upstream

Bosch Wideband Oxygen Sensor for Precise Fuel Control

Bosch Validated Oxygen Sensor 18090 is a heated wideband A/F oxygen sensor built for accurate air-fuel ratio measurement across the full lambda range. It provides the ECU with detailed feedback for tighter mixture control, helping maintain fuel efficiency, engine response, and lower emissions in demanding driving conditions.

This Bosch Validated Oxygen Sensor line reflects Bosch’s OE development background and the planar pump-cell design that set the standard for modern wideband engine management. Part number 18090 is a specific-fit replacement with a threaded metal housing, 5-wire harness, and square male connector for direct service on the listed applications.

Key Features

• Wideband A/F oxygen sensor for continuous ratio measurement
• Heated design for faster sensor warm-up and stable operation
• Specific-fit replacement with included wiring harness
• 5-wire configuration with square connector and female terminals
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing for durable exhaust-side service
• Overall length: 19.7 in; harness length: 16.3 in

Detailed Product Overview

Bosch 18090 is engineered as a standard replacement wideband oxygen sensor for vehicles that require precise upstream air-fuel monitoring. Unlike a traditional switching O2 sensor, a wideband sensor measures the mixture over a broader operating range, giving the engine control module more exact data during idle, acceleration, and load changes. That makes this part a strong choice for restoring proper fuel trim control on applications such as the 2009-2012 Nissan Sentra, 2012-2014 Nissan Cube, and 2009-2012 INFINITI FX50, as well as the 2011 Nissan Cube from 10/2010 with California Emission System.

This part cross-references Bosch Validated Oxygen Sensor applications using OE-style replacement references 22693ZJ60A and 226931CA0A for the same application.

What This Sensor Helps Address

• Check engine light related to upstream oxygen sensor performance
• Incorrect air-fuel ratio readings affecting drivability
• Reduced fuel economy caused by inaccurate mixture feedback
• Rough idle, hesitation, or inconsistent throttle response
• Emission test failures tied to sensor degradation

Installation Notes and Tips

Install Bosch 18090 only on the listed upstream applications and verify California Emission System requirements before ordering. Confirm the connector shape, terminal style, thread size, and harness length match the original sensor before installation. Because this is a threaded exhaust sensor, proper removal tools and anti-seize practices should be used according to service procedures, and the exhaust system should be cool before service begins.

Quality Assurance

Bosch draws on more than five decades of OE sensor development, and this Validated Oxygen Sensor line is built to OE-proven standards for accuracy, thermal durability, and reliable heater control. Part number 18090 is designed for direct replacement service on the specified Nissan and INFINITI applications.