Bosch 15128 Oxygen Sensor - Downstream or Upstream

Overview of Bosch Engineered Oxygen Sensor 15128

The Bosch Engineered Oxygen Sensor 15128 is designed for precise emission control in select GM and related vehicles. This narrow-band heated oxygen sensor ensures accurate air-fuel mixture readings, helping maintain optimal engine performance and emissions compliance.

• Specific fit for Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Pontiac, Saab, and Saturn models
• Heated narrow-band oxygen sensor with 4-wire configuration
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Includes a 14-inch wiring harness with a square male connector
• Constructed with durable metal housing and steel finish

Detailed Product Features and Specifications

The Bosch Engineered Oxygen Sensor 15128 features a 4-wire heated design that allows for faster sensor warm-up and improved accuracy in measuring oxygen levels in the exhaust gases. Its narrow-band sensor type is tailored for specific vehicle applications, ensuring compatibility with models such as the Chevrolet Silverado 1500, GMC Sierra 1500, Buick Lucerne, and Cadillac DTS. The sensor’s threaded mounting type with an 18 mm diameter and 22 mm hex size facilitates straightforward installation using standard tools.

The sensor includes a 14-inch wiring harness with a square-shaped male connector and blade-type terminals, providing secure electrical connections. The overall length from sealing surface to connector end measures approximately 16.5 inches, allowing for proper fitment within the engine bay. The metal housing and steel finish contribute to the sensor’s durability under high-temperature exhaust conditions.

About the Bosch Engineered Oxygen Sensor Line

The Bosch Engineered Oxygen Sensor line focuses on delivering reliable emission control components designed to meet or exceed OEM specifications. This product line emphasizes precise sensor technology and robust construction to support vehicle emission systems effectively. The 15128 oxygen sensor is part of this line, offering a standard replacement option engineered specifically for certain GM and related vehicle models.

Common Applications and Problem Resolution

• Restores accurate air-fuel ratio readings for improved engine efficiency
• Resolves check engine light triggers related to oxygen sensor faults
• Helps reduce harmful exhaust emissions by maintaining proper combustion
• Addresses rough idling or poor fuel economy caused by faulty sensors
• Prevents failed emissions tests due to sensor malfunction

Installation Notes and Tips

Installation of the Bosch Engineered Oxygen Sensor 15128 requires removal of the old sensor from the exhaust manifold or pipe. Use a 22 mm oxygen sensor socket or wrench for removal and installation. Ensure the wiring harness is routed away from hot exhaust components to prevent damage. The sensor’s threaded design allows for a secure fit; apply anti-seize compound on the threads if recommended by the vehicle manufacturer. Verify connector engagement to avoid electrical issues.

Quality Assurance and Warranty

This Bosch oxygen sensor is manufactured to meet industry standards for emission control sensors. It features a heated element for reliable operation under varying engine conditions. While specific warranty details are not provided here, Bosch products typically come with a limited warranty covering defects in materials and workmanship. Refer to Bosch or the vehicle’s parts provider for exact warranty terms.