NTK 27014 Air / Fuel Ratio Sensor - Upstream Left or Upstream Right

NTK Direct Fit Air/Fuel Ratio Sensor

NTK Part Number 27014 is a direct fit heated air/fuel ratio sensor for upstream applications on select Ford and Lincoln vehicles. It is built with a 5-wire design, specific fitment, and OE-style dimensions to support accurate air/fuel monitoring in the exhaust stream.

NTK’s Direct Fit 5-Wire A/F Sensor line focuses on original-equipment style replacement coverage, with application-specific connectors and sensor construction for straightforward service on import and domestic vehicles. Part number 27014 follows that approach for upstream right and upstream left positions where listed.

Key Features

• Heated air/fuel ratio sensor for upstream engine management applications
• Specific fit replacement with OE-style connector and harness layout
• 5-wire sensor design for precise signal delivery
• 11.5 in. wiring harness length
• 18 mm thread diameter with 0.38 in. thread length
• No mounting bracket included
• Cross-reference: DENSO Auto Parts 234-5175
• Cross-reference: FB5Z9F472A

Detailed Description

NTK 27014 is an upstream air/fuel ratio sensor engineered for direct replacement service on vehicles such as the Ford Explorer, Ford Edge, Ford Mustang, Ford Flex, Ford Taurus, Ford Transit-150, Ford Transit-250, Ford Transit-350, Ford Transit-350 HD, Ford E-350 Super Duty, Lincoln Continental, Lincoln MKX, Lincoln MKS, and Lincoln MKT. It is listed for upstream right and upstream left positions depending on the application, including Bank 1 Sensor 1 and Bank 2 Sensor 1 locations. For buyers searching for a Ford Explorer upstream oxygen sensor or a Lincoln Continental Bank 1 Sensor 1 replacement, this part number 27014 provides application-specific coverage.

NTK manufactures oxygen and air/fuel sensors with ceramic technology control from raw material through finished product, and its OE-focused production supports fit, form, and function consistency. This sensor is part of the NTK Direct Fit 5-Wire A/F Sensor line, which is built for exact-match replacement on covered vehicles rather than universal adaptation.

What It Helps Address

• Check engine light related to upstream oxygen sensor performance
• Incorrect air/fuel ratio readings reported to the engine control module
• Rough idle or drivability issues tied to sensor signal degradation
• Fuel trim problems caused by a worn heated A/F sensor
• Failed emissions inspection due to sensor-related faults

Installation Notes and Tips

Verify the vehicle’s year, make, model, and sensor position before ordering. This part is specific fit and is listed for upstream right and upstream left applications only where shown. Confirm the connector style, thread diameter, and harness length against the original sensor before installation. Use the vehicle service information for torque, routing, and connector handling procedures.

Quality Assurance

NTK states that its oxygen sensors are extensively tested during manufacturing to meet or exceed OE specifications. As an OE supplier with broad application coverage, NTK supports replacement parts built for consistent performance on covered Ford and Lincoln applications.