Bosch 16449 Oxygen Sensor

Bosch Actual OE Oxygen Sensor 16449

Bosch 16449 is an Actual OE Oxygen Sensor built as a narrow-band heated replacement for precise air-fuel-ratio feedback to the ECU. It is a specific-fit sensor with a threaded mount, square connector, and included wiring harness for direct replacement on listed Cadillac, Buick, Chevrolet, and GMC applications.

Key Features

• Actual OE Oxygen Sensor from Bosch’s OE-focused product line
• Narrow-band heated design for stable closed-loop operation
• Specific-fit application with 4-wire, pin-terminal construction
• Square male connector with female terminals
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Wiring harness included; harness length measures 8 in
• Steel finish with metal housing for underbody durability

Product Details

Bosch 16449 uses a switching-type oxygen sensing element to report exhaust oxygen content to the engine control unit, helping maintain accurate fuel control across changing load and temperature conditions. Bosch’s Actual OE Oxygen Sensor line builds on decades of original equipment development, including narrowband planar sensor technology that improves light-off response and closed-loop transition speed. This part cross-references GM 12634064 for the same application. It is a direct-fit oxygen sensor for vehicles such as the Cadillac ATS, Cadillac CTS, Buick Enclave, Chevrolet Traverse, Chevrolet Caprice, Chevrolet Camaro, and GMC Acadia.

What This Oxygen Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio feedback to the ECU
• Rough idle or unstable combustion control from a worn sensor
• Delayed closed-loop fuel control after startup
• Emissions test failures caused by degraded sensor response

Installation Notes and Tips

• Compatible With 2013-2019 Cadillac ATS, downstream
• Compatible With 2014-2019 Cadillac CTS, downstream
• Compatible With 2012-2017 Buick Enclave, upstream
• Compatible With 2012-2017 Chevrolet Caprice, upstream
• Compatible With 2012-2017 Chevrolet Caprice, downstream
• Compatible With 2012-2017 Chevrolet Traverse, upstream
• Compatible With 2017 GMC Acadia Limited, upstream
• Compatible With 2012-2016 GMC Acadia, upstream
• Compatible With 2012-2014 Cadillac CTS, downstream right
• Compatible With 2012 Chevrolet Camaro, downstream right
• Compatible With 2012 Chevrolet Camaro, downstream left

Verify connector shape, wire count, thread size, and sensor position before installation. Bosch 16449 is a narrow-band heated oxygen sensor with a threaded 18 mm mount, so proper removal tools and anti-seize practices should be followed according to service procedures.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development and aftermarket supply experience. The design uses advanced ceramic elements, controlled heater operation, and high-temperature-resistant materials to maintain consistent sensor output under thermal and vibration load.