Bosch 15165 Oxygen Sensor - Downstream, Downstream Left or Downstream Right

Reliable Oxygen Sensor for Cadillac, Chevrolet, GMC, and More

The Bosch Engineered Oxygen Sensor 15165 is designed to provide accurate air-fuel mixture readings for specific vehicle models including Cadillac CTS, Chevrolet Malibu, GMC Sierra 3500 HD, and others. This narrow-band heated oxygen sensor ensures optimal engine performance and emission control.

• Specific fit for select Cadillac, Chevrolet, GMC, Hummer, Pontiac, and Saturn models
• Heated narrow-band oxygen sensor for precise emissions monitoring
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Includes a 23.1-inch wiring harness with 4-pin male connector and female terminals
• Durable metal housing finished in steel for long-lasting use
• Standard replacement grade with an overall length of 26.8 inches

About the Bosch Engineered Oxygen Sensor Line

The Bosch Engineered Oxygen Sensor line focuses on delivering reliable emission control components tailored to specific vehicle applications. The 15165 oxygen sensor is engineered to meet OEM specifications, providing consistent performance and durability. This product line emphasizes precise sensor technology and robust construction to maintain engine efficiency and reduce harmful emissions.

Product Details and Specifications

This Bosch oxygen sensor features a narrow-band heated sensor type, which allows for faster sensor response and improved fuel management. The sensor is equipped with a 4-wire configuration, including a 4-pin square connector with male connector gender and female terminal gender. The wiring harness length is 23.1 inches, with an overall length of 26.8 inches from sealing surface to connector end. The sensor mounts via a threaded 18 mm diameter fitting and uses a 22 mm hex size for installation. The metal housing finished in steel ensures durability under high-temperature conditions.

Common Applications and Issues Addressed

• Restores accurate oxygen sensing for Cadillac CTS and SRX models
• Improves fuel efficiency and reduces emissions in Chevrolet Malibu and G6 vehicles
• Resolves engine performance issues in GMC Sierra 3500 HD and Silverado 3500 HD
• Helps correct check engine light triggers related to oxygen sensor faults
• Supports emission compliance for Hummer H2 and Pontiac Aura

Installation Notes and Tips

Ensure the vehicle is cooled before removing the old oxygen sensor to avoid burns. Use a 22 mm oxygen sensor socket for removal and installation. Verify the wiring harness connector matches the vehicle’s factory connector to ensure proper fitment. The threaded mounting type requires careful tightening to manufacturer torque specifications to prevent damage. This sensor is a specific fit and should be matched to the correct make and model for optimal performance.

Quality Assurance and Warranty

The Bosch Engineered Oxygen Sensor 15165 is manufactured to meet strict quality standards for emission control sensors. It is constructed with durable metal housing and reliable wiring components to withstand harsh engine environments. While specific warranty details are not provided here, Bosch products typically come with a limited warranty covering defects in materials and workmanship.