Bosch 17323 Oxygen Sensor - Upstream Left

Bosch Wideband OE Oxygen Sensor

Bosch 17323 is an Actual OE Oxygen Sensor built as a wideband air-fuel sensor for precise mixture feedback to the ECU. It is a specific-fit, heated sensor with a 5-wire harness and 6-terminal connection, made for upstream left placement on select Ford and Lincoln trucks and SUVs.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement across the full lambda range
• Heated design for faster sensor activity and stable operation during cold starts
• Specific-fit replacement with included wiring harness
• Threaded mounting with 18 mm thread diameter and 22 mm hex size
• Oblong male connector, male blade terminals, and 26.4 in wiring harness length
• Steel finish with metal housing for OE-style durability

Product Details

Bosch 17323 uses Bosch wideband sensor technology to provide detailed feedback for modern engine management systems. Bosch pioneered the planar pump-cell wideband design used across current low-emission applications, and this sensor reflects that OE development with fast light-off, controlled heater performance, and robust ceramic construction. It is a direct replacement for the upstream left oxygen sensor position on 2011-2016 Ford F-150, 2012-2017 Ford Expedition, and 2012-2017 Lincoln Navigator. This part cross-references Bosch 17323 for the same application.

What This Sensor Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel ratio readings from a worn wideband sensor
• Rough idle or drivability issues tied to inaccurate upstream feedback
• Reduced fuel economy caused by poor mixture control
• Higher emissions from delayed or unstable sensor response

Installation Notes and Fitment

Fits 2011 Ford F-150, upstream left, from 01/2011; Actual OE Oxygen Sensor. Fits 2011 Ford Expedition, upstream left, from 12/2010; Actual OE Oxygen Sensor. Fits 2011 Lincoln Navigator, upstream left, from 12/2010; Actual OE Oxygen Sensor. Fits 2012-2016 Ford F-150, upstream left. Fits 2012-2017 Ford Expedition, upstream left. Fits 2012-2017 Lincoln Navigator, upstream left.

Confirm the upstream left sensor location before installation and match the connector, thread size, and harness routing to the original unit. Use proper oxygen sensor service tools to avoid damage to the threaded bung or wiring.

Quality Assurance

Bosch backs this oxygen sensor with more than five decades of OE development and aftermarket supply experience. The design follows Bosch Actual OE standards for accurate signal control, consistent heater performance, and long-term reliability in emission control service.