Bosch 15200 Oxygen Sensor - Upstream

Bosch Oxygen Sensor for Upstream GM Applications

Bosch Part Number 15200 is a narrow-band heated oxygen sensor built for upstream exhaust locations on select Cadillac, Chevrolet, and GMC trucks and SUVs. It provides the ECU with air-fuel-ratio feedback needed for stable closed-loop fuel control and lower emissions.

Compatible With 2007-2014 Cadillac Escalade, Escalade ESV, Escalade EXT; 2007-2014 Chevrolet Avalanche, Silverado 1500, Silverado 2500 HD, Silverado 3500 HD, Suburban 1500, Suburban 2500, Tahoe; and 2007-2014 GMC Sierra 1500, Sierra 2500 HD, Sierra 3500 HD, Yukon, Yukon XL 1500, Yukon XL 2500 in upstream positions.

Key Features

• Bosch Engineered Oxygen Sensor line for OE-style replacement performance
• Narrow-band heated oxygen sensor for faster closed-loop operation
• Specific-fit design with 4-wire harness and rectangular male connector
• Threaded mounting with 18 mm thread size and 22 mm hex size
• Metal housing and high-temperature-resistant construction for demanding exhaust conditions
• Wiring harness included for direct replacement on listed applications
• Part number 15200 for easy identification and ordering

Product Details

Bosch developed its oxygen sensor technology from early thimble-style designs to later planar narrowband sensors that improve light-off speed and lambda measurement accuracy. This Bosch Engineered Oxygen Sensor uses advanced ceramic elements and controlled heater operation to deliver consistent signal response under heat and vibration. On GM trucks and SUVs such as the Chevrolet Silverado 1500, GMC Sierra 1500, and Cadillac Escalade, that means dependable upstream feedback for fuel trim control and emissions monitoring.

This part cross-references GM 12583804 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to upstream oxygen sensor performance
• Rough idle caused by inaccurate air-fuel feedback
• Fuel trim faults from slow or unstable sensor response
• Failed emissions inspection tied to oxygen sensor readings
• Reduced closed-loop fuel control on affected Cadillac, Chevrolet, and GMC vehicles

Installation Notes and Tips

• Install in the upstream exhaust location only on the listed applications.
• Verify the connector shape, 4-wire layout, and threaded mounting before installation.
• Inspect the exhaust bung threads and sealing surface for damage or corrosion.
• Use proper oxygen sensor service tools to avoid damaging the hex or harness.
• Clear diagnostic trouble codes and confirm live data after installation.

Quality Assurance

Bosch has more than five decades of OE oxygen sensor development and supplies aftermarket sensors built to OE-proven standards. Bosch Part Number 15200 is engineered for accurate signal delivery, durable heater performance, and consistent operation in harsh exhaust environments.