NTK 27094 Air / Fuel Ratio Sensor - Upstream

Direct-Fit Air/Fuel Ratio Sensor

NTK 27094 is a specific-fit, heated wide-band air/fuel ratio sensor built for precise fuel control and emissions monitoring. It uses a 5-wire design with a rectangular female connector and metric M18 x 1.5 threads for direct-fit service on supported applications.

Compatible with Alfa Romeo Giulia and Alfa Romeo Stelvio applications, this NTK air/fuel ratio sensor helps the engine control unit read mixture changes with linear signal output rather than simple rich-or-lean switching. The result is tighter air-fuel correction for efficient combustion and lower emissions.

Key Features

• Wide-band air/fuel ratio sensor for precise mixture feedback
• Heated design for faster operating response
• Specific-fit configuration for direct replacement service
• 5-wire technology with blade terminals and rectangular connector
• Metric thread size: M18 x 1.5 with 7.00 thread length
• Black connector housing and standard replacement grade

Detailed Description

NTK 27094 is engineered as a direct-fit 5-wire A/F sensor for upstream applications on the Alfa Romeo Giulia and Alfa Romeo Stelvio. The wide-band sensing element provides a linear output signal, allowing the ECU to make continuous air-fuel adjustments instead of relying on a simple switching signal. That control supports stable combustion, fuel efficiency, and emissions management. The part number 27094 is also referenced for OE-style service applications, and 27094 cross-references 68315196AA for the same application.

What It Helps Address

• Incorrect air-fuel mixture readings
• Check engine light concerns related to sensor performance
• Reduced fuel economy from inaccurate mixture control
• Elevated emissions from poor combustion control
• Slow or unstable sensor response in closed-loop operation

Installation Notes and Tips

Install as a specific-fit upstream sensor on the listed applications. Verify the M18 x 1.5 thread size, 5-wire configuration, and rectangular female connector before installation. The sensor uses a heated design and a blade-terminal connection; confirm harness routing and connector indexing match the original layout. Part number 27094 should be matched to the vehicle application before replacement.

Quality Assurance

NTK is a major OEM oxygen sensor supplier with broad OE application coverage and in-house ceramics expertise used in wide-band sensor production. Part number 27094 is built to standard replacement specifications for direct-fit service.