Bosch 17358 Oxygen Sensor - Upstream

Bosch Wideband OE Oxygen Sensor

Bosch 17358 is an Actual OE Oxygen Sensor built as a wideband air-fuel ratio sensor for precise upstream fuel control. It is a specific-fit, heated replacement with a 5-wire harness and 6 terminals, made for vehicles that rely on accurate lambda feedback for engine management.

Compatible With 2013-2020 Ford Fusion, Upstream; 2019-2020 Ford SSV Plug-In Hybrid, Upstream; 2013-2020 Lincoln MKZ, Upstream; 2014-2018 Ford C-Max, Upstream; 2014-2018 Ford Focus, Upstream; and 2013-2016 Ford Escape, Upstream.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement across the full lambda range
• Heated design for faster sensor warm-up and stable operation
• Specific-fit replacement with included wiring harness
• Threaded mounting type with 18 mm thread diameter and 22 mm hex size
• Oblong male connector with blade terminals
• Metal housing and robust ceramic sensor construction
• Bosch 17358 OE-style replacement for upstream emission control service

Detailed Description

Bosch 17358 uses wideband sensing technology to provide the ECU with more detailed air-fuel data than a traditional switching sensor. That level of feedback helps maintain accurate mixture control during idle, cruise, acceleration, and rapid load changes. Bosch pioneered the planar pump-cell wideband design used in modern engine management, and this part reflects that OE development background.

This Bosch Actual OE Oxygen Sensor is a direct replacement for Ford Fusion, Ford Focus, Ford Escape, Ford C-Max, Lincoln MKZ, and Ford SSV Plug-In Hybrid upstream applications listed in the fitment data. The 15.9-inch harness length, 18-inch sealing-surface-to-connector length, and threaded mount support a factory-style service replacement. Bosch 17358 is also a practical search match for drivers looking for a 2013-2020 Ford Fusion upstream oxygen sensor or a 2013-2020 Lincoln MKZ wideband O2 sensor.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Incorrect air-fuel ratio readings sent to the ECU
• Rough idle or inconsistent fuel control caused by sensor degradation
• Reduced fuel economy from inaccurate mixture feedback
• Emissions test failures tied to faulty wideband sensor operation

Installation Notes and Tips

Install Bosch 17358 in the upstream location specified by the vehicle application. Confirm connector shape, terminal count, thread size, and harness routing before installation. Because this is a threaded oxygen sensor, use the correct oxygen sensor socket and follow the vehicle service procedure for removal and torque specification. Verify the exhaust system is cool before service and inspect the connector and wiring for heat damage before reconnecting.

Quality Assurance

Bosch has more than five decades of OE development experience in oxygen sensor technology, and this part is built to OE-proven standards for modern emission control systems. Bosch 17358 is a reliable replacement choice for drivers servicing a Ford Fusion, Ford Focus, Ford Escape, Ford C-Max, or Lincoln MKZ upstream wideband sensor application.