Bosch 16737 Oxygen Sensor - Upstream

Bosch Actual OE Oxygen Sensor for Upstream Use

Bosch Part Number 16737 is an Actual OE Oxygen Sensor built for precise air-fuel-ratio feedback to the ECU. It is a narrow-band heated sensor with a specific-fit design, making it a direct replacement for select Buick Encore, Chevrolet Trax, Chevrolet Sonic, Chevrolet Cruze Limited, and Chevrolet Cruze upstream applications.

Bosch’s Actual OE Oxygen Sensor line draws on decades of OE development, using advanced ceramic sensing elements, controlled heater performance, and heat-resistant materials to maintain stable operation under demanding thermal and vibration conditions. This Bosch 16737 oxygen sensor is engineered for accurate closed-loop control and consistent emissions monitoring.

Key Features

• Specific-fit upstream oxygen sensor for select GM applications
• Narrow-band heated design for faster closed-loop operation
• 4-wire configuration with blade terminals
• Oblong male connector with female terminals
• Threaded mounting, 18 mm thread size, 22 mm hex size
• Wiring harness included; harness length 14.8 in
• Overall length 18.1 in; sealing surface to connector end 16.9 in
• Steel finish with metal housing for OE-style durability

Product Details

Bosch 16737 is an upstream narrow-band heated oxygen sensor that measures exhaust oxygen content and sends the signal needed for fuel-trim correction. It is a direct OE-style replacement for vehicles such as the 2015-2021 Buick Encore, 2015-2021 Chevrolet Trax, 2017-2020 Chevrolet Sonic, 2011-2015 Chevrolet Cruze, and 2016 Chevrolet Cruze Limited. This part also covers select 2012 and 2013 Chevrolet Sonic and 2013 Chevrolet Trax applications, including notes for the 1st design and black connector variants.

This part cross-references GM 55572993 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect fuel trim readings from a worn upstream sensor
• Rough idle or unstable combustion control caused by delayed sensor response
• Failed emissions inspection tied to sensor output issues
• Slow closed-loop transition after cold start

Installation Notes and Tips

Install this sensor in the upstream position only where listed in the fitment data. Verify connector style, harness length, and thread size before installation, especially on 2013 Buick Encore and 2013 Chevrolet Sonic or Trax applications with design-specific notes. Use the correct oxygen sensor socket for the 22 mm hex and confirm the threaded mounting seats properly to avoid exhaust leaks.

Quality Assurance

Bosch supplies this Actual OE Oxygen Sensor with OE-proven design principles developed over more than five decades of oxygen sensor engineering. The sensor uses durable materials and heater control strategies intended to support stable operation in demanding exhaust environments.