Bosch 15881 Oxygen Sensor - Downstream

Bosch Actual OE Oxygen Sensor for Nissan Quest

Bosch 15881 is a specific-fit, narrow-band heated oxygen sensor built for downstream use on the 1998 Nissan Quest. It measures exhaust oxygen content and sends precise air-fuel-ratio data to the ECU to support stable closed-loop fuel control and lower emissions.

As part of Bosch’s Actual OE Oxygen Sensor line, this sensor reflects Bosch’s long OE development history in oxygen sensing, including narrowband planar designs that improve response time and lambda accuracy. Bosch 15881 is engineered for consistent operation under heat and vibration, making it a direct replacement choice for the 1998 Nissan Quest, downstream.

Key Features

• Part number 15881
• Actual OE Oxygen Sensor line from Bosch
• Specific-fit downstream oxygen sensor for the 1998 Nissan Quest
• Narrow-band heated oxygen sensor for closed-loop fuel control
• 4-wire design with square male connector and blade terminals
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included with 28.8 in harness length
• Metal housing for high-temperature service

Detailed Description

Bosch 15881 is a downstream oxygen sensor for the 1998 Nissan Quest that provides the ECU with exhaust oxygen feedback needed to maintain proper air-fuel ratio. The narrow-band heated design helps the sensor reach operating temperature quickly, supporting faster closed-loop operation after startup and more stable emissions control during normal driving. Bosch’s OE-focused sensor design uses durable ceramic sensing elements and heat-resistant materials to maintain signal consistency in demanding exhaust conditions.

This Bosch Actual OE Oxygen Sensor is a direct replacement for the original downstream sensor on the 1998 Nissan Quest. If you are searching for a 1998 Nissan Quest downstream oxygen sensor, Bosch 15881 offers the OE-style fit and electrical configuration needed for a clean replacement. This part cross-references 226A06B703 for the same application.

What It Helps Fix

• Check engine light related to oxygen sensor performance
• Rich or lean fuel mixture codes
• Rough idle caused by inaccurate exhaust feedback
• Reduced fuel control accuracy in closed-loop operation
• Emissions test failures tied to a worn downstream sensor

Installation Notes and Tips

Confirm the vehicle is a 1998 Nissan Quest, downstream position, before ordering Bosch 15881. Verify the 18 mm threaded bung, 4-wire connector style, and harness routing match the original sensor. Inspect the exhaust threads and connector condition before installation, and apply proper sensor-safe service practices when removing the old unit.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development behind this Actual OE Oxygen Sensor line. Bosch 15881 is built to OE-style standards for signal accuracy, thermal durability, and consistent operation in the exhaust stream.