Bosch 15898 Oxygen Sensor - Downstream, Upstream or Upstream Right

Overview of Bosch Engineered Oxygen Sensor 15898

The Bosch Engineered Oxygen Sensor 15898 is a specific-fit, narrow-band heated oxygen sensor designed for precise emission control. Engineered for select Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, and Saturn models, this sensor ensures accurate air-fuel mixture readings to optimize engine performance and reduce emissions.

• Specific fit for various GM and related vehicle models
• Heated narrow-band oxygen sensor for faster response
• Threaded mounting type with 18 mm thread diameter
• 14-inch wiring harness with 4 wires and blade terminals
• Durable metal housing with steel finish
• Connector features a square shape with male gender terminals
• Standard replacement grade for reliable performance
• Overall length of 17.7 inches for proper installation

About the Bosch Engineered Oxygen Sensor Line

The Bosch Engineered Oxygen Sensor line focuses on delivering precise emission control components tailored to specific vehicle applications. This product line emphasizes compatibility and durability, providing sensors that meet OEM specifications. The 15898 oxygen sensor is part of this line, offering a heated narrow-band sensor designed to maintain optimal engine efficiency and emission standards for the listed GM and related models.

Product Details and Specifications

This oxygen sensor features a 14-inch wiring harness with four wires, allowing for accurate signal transmission and heater circuit operation. The sensor uses blade-type terminals and a square-shaped male connector to ensure secure electrical connections. Its threaded mounting type with an 18 mm diameter and 22 mm hex size allows for straightforward installation using standard tools. The sensor’s metal housing and steel finish provide durability under high-temperature exhaust conditions. Weighing approximately 0.35 pounds, the sensor is designed as a standard replacement part for vehicles including the Chevrolet Silverado 1500, Cadillac Escalade, GMC Sierra 1500, and others.

Compatible Vehicles and Common Applications

• Cadillac Escalade, Escalade ESV, Escalade EXT, CTS
• Chevrolet Avalanche, Silverado 1500, Suburban 1500/2500, Tahoe
• GMC Sierra 1500, Sierra 1500 Classic, Yukon, Yukon XL 1500/2500, Envoy
• Hummer H2
• Isuzu Ascender, Bravada, L100, L200, L300, LW200, Safari
• Oldsmobile Alero, Pontiac Grand Am, Sunfire
• Saturn Ion, Vue

Common Issues Addressed by Oxygen Sensor 15898

• Incorrect air-fuel mixture readings causing poor fuel economy
• Check engine light triggered by faulty oxygen sensor signals
• Increased emissions due to sensor malfunction
• Engine performance issues such as rough idling or hesitation
• Failed emissions tests related to sensor degradation

Installation Notes and Tips

Installation requires a 22 mm hex socket for sensor removal and tightening. Ensure the threaded mounting hole is clean before installation to prevent cross-threading. The 14-inch wiring harness with a square male connector should be connected securely to the vehicle’s wiring system. No mounting bracket is included, so use the existing sensor mounting location. It is recommended to disconnect the battery before installation to avoid electrical shorts. Verify sensor compatibility with your specific vehicle model and engine configuration before installation.

Quality Assurance and Warranty

The Bosch Engineered Oxygen Sensor 15898 is manufactured to meet OEM standards for fit, form, and function. It is constructed with a metal housing and heated sensor element to ensure durability and reliable operation under demanding conditions. While specific warranty details are not provided here, Bosch products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.