Bosch 13026 Oxygen Sensor - Upstream

Bosch Oxygen Sensor for Upstream Emissions Control

Bosch Engineered Oxygen Sensor 13026 is a specific-fit, narrow-band heated O2 sensor built for upstream air-fuel monitoring. It delivers the signal the ECU uses to maintain stable combustion control and manage emissions across changing load and temperature conditions.

Compatible With 1999-2003 Chevrolet Silverado 1500, 1999-2002 Chevrolet Silverado 2500, 2000-2002 Chevrolet Tahoe, and other listed GM and Isuzu applications, this Bosch oxygen sensor is built around OE-style ceramic sensing technology and a threaded metal housing for direct replacement service.

Key Features

• Bosch Engineered Oxygen Sensor part number 13026
• Narrow-band heated oxygen sensor for upstream placement
• Specific-fit design with included wiring harness
• 4-wire configuration with blade terminals and oblong connector
• Threaded mounting with 18 mm thread size and 22 mm hex
• Metal housing with high-temperature-resistant construction
• Wiring harness length: 12.1 in; overall length: 15.8 in

Product Details

Bosch has decades of OE oxygen sensor development behind this design, starting with its original sensor architecture and later advancing to planar narrowband technology for faster light-off and quicker closed-loop operation. Bosch Engineered Oxygen Sensor 13026 uses a heated narrow-band sensing element to provide the ECU with accurate exhaust feedback, helping the engine manage fuel delivery more consistently during warm-up and normal driving.

This part cross-references 19178961 and 8253252660 for the same application. It is a direct replacement choice for upstream service on Chevrolet Silverado 1500, GMC Sierra 1500, and related GM trucks and SUVs listed in the fitment data.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Rough idle caused by inaccurate air-fuel feedback
• Fuel trim issues from slow or inconsistent sensor response
• Failed emissions inspection tied to upstream sensor faults
• Reduced closed-loop fuel control during warm-up or steady cruising

Installation Notes

Install in the upstream sensor location only where listed in the fitment data. Verify connector shape, wire count, thread size, and harness length before installation. Use the threaded mounting point and proper oxygen sensor service tools to avoid damage to the sensor body or exhaust bung. Confirm the vehicle build details for Canada-built and USA-built notes where shown.

Quality Assurance

Bosch supplies oxygen sensors with OE-proven engineering and durable materials selected for heat and vibration exposure in exhaust service. Bosch Engineered Oxygen Sensor 13026 reflects that OE development background and is built as a standard replacement part for the listed applications.

Fitment

• Fits 2001-2003 Isuzu Rodeo, upstream.
• Fits 2001-2003 Isuzu Rodeo Sport, upstream.
• Fits 2002 Cadillac Escalade, upstream.
• Fits 2002 Chevrolet Avalanche 1500, upstream.
• Fits 1999-2002 Chevrolet Silverado 1500, upstream.
• Fits 2000-2002 Chevrolet Suburban 1500, upstream.
• Fits 2000-2002 Chevrolet Tahoe, upstream.
• Fits 2000-2002 GMC Sierra 1500, upstream.
• Fits 2000-2002 GMC Yukon, upstream.
• Fits 2000-2002 GMC Yukon XL 1500, upstream.
• Fits 2000 Chevrolet Silverado 2500, upstream.
• Fits 1999 Chevrolet Silverado 2500, upstream.
• Fits 2000 GMC Sierra 2500, upstream.
• Fits 1999 GMC Sierra 2500, upstream.