Bosch 17279 Oxygen Sensor - Upstream

Bosch Wideband OE Oxygen Sensor for Ford and Lincoln

Bosch 17279 is an Actual OE Oxygen Sensor built as a wideband air-fuel sensor for precise upstream mixture monitoring. It delivers continuous AFR feedback to the ECU, helping maintain accurate fuel control on select Ford and Lincoln applications, including Edge, Explorer, Taurus, Flex, MKS, MKT, F-250 Super Duty, and F-350 Super Duty.

The Bosch Actual OE Oxygen Sensor line focuses on OE-style fit, fast response, and durable construction for modern engine management systems. Part number 17279 uses a heated wideband design with a specific-fit harness and threaded mounting for direct replacement service.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement
• Heated sensor design for faster operating temperature and stable signal output
• Specific-fit replacement with included wiring harness
• 5-wire sensor layout with 6 terminals and oblong male connector
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Steel finish with metal housing for OE-style durability
• Overall length: 12.6 in; sealing surface to connector end: 11.4 in

Detailed Description

Bosch 17279 is engineered for upstream exhaust placement where the engine control module relies on accurate oxygen and air-fuel data. As a wide band sensor, it provides more detailed feedback than a traditional switching sensor, helping the ECU manage mixture control across changing load and temperature conditions. This Bosch Actual OE Oxygen Sensor is a direct-fit replacement for 2010-2012 Ford and Lincoln vehicles listed in the fitment data, including 2012 Ford Edge, 2012 Ford Explorer, 2011-2012 Ford Taurus, and select 2010-2011 Ford Flex, Lincoln MKS, and Lincoln MKT applications.

Bosch pioneered the wideband planar pump-cell design used in modern engine management, and this part reflects that OE development background in a service replacement format. Part number 17279 is also referenced by Bosch 17279 for the same application.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn wideband sensor
• Rough idle or drivability issues tied to inaccurate mixture feedback
• Reduced fuel economy caused by poor sensor response
• Emissions test failures linked to faulty oxygen sensor data

Installation Notes and Tips

• Install in the upstream position only where listed in the fitment data.
• Verify connector shape, terminal count, and harness length before installation.
• Use the correct 22 mm oxygen sensor socket and thread size match for removal and installation.
• Inspect the exhaust bung threads and wiring routing before final tightening.
• Confirm vehicle build date notes for 2011 Ford F-250 Super Duty, F-350 Super Duty, Flex, and Lincoln MKS/MKT applications.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development and aftermarket supply experience. The sensor is built to OE-proven standards for accurate signal output, reliable heater performance, and consistent operation in demanding thermal conditions.

• Fits 2012 Ford Edge, Upstream
• Fits 2012 Ford Explorer, Upstream
• Fits 2011-2012 Ford Taurus, Upstream
• Fits 2011 Ford F-250 Super Duty, Upstream, to 05/2011
• Fits 2011 Ford F-350 Super Duty, Upstream, to 05/2011
• Fits 2011 Ford Flex, Upstream, to 11/2010
• Fits 2011 Lincoln MKS, Upstream, to 11/2010
• Fits 2011 Lincoln MKT, Upstream, to 11/2010
• Fits 2010 Ford Flex, Upstream, from 06/2010
• Fits 2010 Ford Taurus, Upstream, from 07/2010
• Fits 2010 Lincoln MKS, Upstream, from 06/2010
• Fits 2010 Lincoln MKT, Upstream, from 06/2010