Bosch 17066 Oxygen Sensor - Upstream

Bosch Wideband OE Oxygen Sensor

Bosch 17066 is an Actual OE wideband air-fuel oxygen sensor built for precise mixture feedback and stable engine management. It is a specific-fit, heated sensor with a 5-wire harness and 6-terminal blade connector design for direct replacement service on select Ford, Lincoln, and Mercury applications.

For drivers searching for a Bosch 17066 oxygen sensor for Ford Flex, Taurus, Lincoln MKS, or MKT, this wideband unit provides the detailed air-fuel ratio data the ECU needs for accurate control across the full lambda range.

Key Features

• Wideband A/F oxygen sensor for continuous air-fuel ratio measurement
• Heated design for faster sensor activity and stable operation
• Specific-fit replacement with included wiring harness
• 5-wire configuration with blade terminals and oblong male connector
• Threaded mounting, 18 mm thread size, 22 mm hex size
• Metal housing with robust ceramic sensor construction
• Overall length: 12.6 in; sealing surface to connector end: 11.4 in
• Bosch Actual OE Oxygen Sensor line for OE-style service replacement

Detailed Description

Bosch 17066 is engineered as an Actual OE Oxygen Sensor for vehicles that use a wideband upstream air-fuel sensor. Bosch pioneered the planar pump-cell wideband design used in modern engine management, and this sensor follows that OE development approach with fast light-off, controlled heater performance, and durable construction for demanding thermal cycles. It delivers the detailed feedback needed for precise fuel control on applications such as 2008-2010 Ford Taurus, 2008-2009 Ford Taurus X, 2009-2010 Ford Flex, 2009-2010 Lincoln MKS, 2010 Lincoln MKT, and 2008-2009 Mercury Sable, all in the upstream position where listed.

This Bosch 17066 sensor is a direct-fit replacement for select California-emissions and standard OE applications, making it a practical choice when servicing a wideband sensor fault on Ford Flex, Taurus, Lincoln MKS, or MKT platforms.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Incorrect air-fuel ratio readings reported to the ECU
• Rough idle or drivability issues tied to mixture control
• Reduced fuel economy caused by inaccurate sensor feedback
• Elevated emissions from poor fuel mixture regulation

Installation Notes and Tips

Verify the upstream sensor location, connector shape, wire count, and thread size before installation. This Bosch 17066 uses a threaded 18 mm mounting design with a 9.3 in wiring harness length and a 6-terminal blade connector, so matching the original sensor configuration is important for proper fitment. Use the vehicle service information for torque and routing guidance, and inspect the harness path to avoid heat damage or strain on the connector.

Quality Assurance

Bosch backs this Actual OE Oxygen Sensor with more than five decades of OE development experience. The Bosch 17066 is built to OE-proven standards for accurate signal response, reliable heater control, and long-term service in modern emission control systems.