Bosch 16454 Oxygen Sensor - Downstream or Upstream

Bosch OE Oxygen Sensor for Precise Fuel Control

Bosch Actual OE Oxygen Sensor 16454 is a narrow-band heated replacement sensor built for accurate air-fuel-ratio feedback to the ECU. It is a specific-fit, threaded sensor with a 4-wire harness and trapezoid connector, made for stable closed-loop operation in demanding exhaust conditions.

For drivers servicing Chevrolet Equinox, GMC Terrain, Buick LaCrosse, Cadillac SRX, and related applications, this Bosch 16454 oxygen sensor supports consistent combustion control and emissions monitoring across a wide range of operating temperatures.

Key Features

• Actual OE Oxygen Sensor from Bosch
• Narrow-band heated sensor design for faster warm-up and closed-loop response
• Specific fit with included wiring harness
• 4-wire, 4-terminal configuration with female connector and female terminals
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Metal housing built for high-temperature and vibration exposure
• Part number 16454 for direct catalog identification

Product Details

Bosch developed its oxygen sensor technology from early OE designs and later planar narrowband construction to improve light-off speed, lambda accuracy, and response time. This Bosch Actual OE Oxygen Sensor uses advanced ceramic elements and controlled heater operation to deliver steady signal output under harsh thermal loads. The result is a replacement sensor suited for vehicles that rely on precise exhaust feedback to maintain proper fuel trim and emissions performance.

This part number 16454 is listed for upstream and downstream positions on select 2009-2017 Chevrolet, GMC, Buick, Cadillac, and Saturn applications. It is a direct-fit oxygen sensor for vehicles such as Chevrolet Equinox, GMC Terrain, and Buick LaCrosse, where accurate sensor feedback is critical to engine management.

This part cross-references 12634061 for the same application.

What This Sensor Helps Address

• Check engine light concerns related to oxygen sensor signal faults
• Rough idle or unstable fuel trim caused by inaccurate exhaust feedback
• Delayed closed-loop operation after startup
• Emissions test failures tied to sensor response or heater issues
• Reduced drivability from a worn upstream or downstream O2 sensor

Installation Notes and Tips

Verify the connector shape, wire count, thread size, and sensor position before installation. This Bosch 16454 oxygen sensor uses a threaded mount and a 4-wire harness, so matching the original connector and harness length is important for proper routing and secure connection. Confirm whether your vehicle requires an upstream or downstream sensor before ordering.

For fitment, this part is listed for 2012-2017 Chevrolet Equinox, upstream and downstream; 2012-2017 GMC Terrain, upstream and downstream; 2012-2016 Buick LaCrosse, upstream and downstream; 2012-2016 Cadillac SRX, upstream and downstream; 2014-2016 Chevrolet Impala Limited, upstream and downstream; 2012-2014 Chevrolet Impala, upstream and downstream; 2012 Chevrolet Captiva Sport, upstream and downstream; 2009-2010 Buick Enclave, upstream; 2009-2010 Chevrolet Traverse, upstream; 2009-2010 GMC Acadia, upstream; and 2009-2010 Saturn Outlook, upstream.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development experience. The Actual OE Oxygen Sensor line is built to deliver OE-proven fit, signal accuracy, and durability for aftermarket replacement use.