NTK 27034 Air / Fuel Ratio Sensor - Upstream

Overview

NTK 27034 is a direct-fit air/fuel ratio sensor built for specific applications and engineered for accurate exhaust feedback. It uses a heated 5-wire design with an 18.000 mm thread diameter and a 12.4 wiring harness length for a precise replacement on the correct application.

Compatible with 2016-2018 Mazda MX-5 Miata, upstream. This NTK 27034 sensor is part of the Direct Fit 5-Wire A/F Sensor line, which focuses on application-specific coverage and OE-style fit, form, and function.

Key Features

• Heated air/fuel ratio sensor for fast operating response
• Specific-fit design for direct replacement on the listed application
• 5-wire configuration for the correct signal setup
• 18.000 mm thread diameter and 0.38 thread length
• 12.4 wiring harness length for proper routing
• NTK 27034 part number for easy identification

Detailed Description

NTK 27034 is an upstream air/fuel ratio sensor for the 2016-2018 Mazda MX-5 Miata. As part of NTK’s Direct Fit 5-Wire A/F Sensor line, it is built for specific vehicle coverage rather than universal use, helping maintain the original sensor configuration on the application listed. The heated design supports quicker sensor operation, while the specified thread and harness dimensions help ensure the replacement matches the intended mounting and connection requirements. The NTK 27034 part number is also useful when verifying the correct sensor for service work or catalog lookup.

NTK is known for oxygen and air/fuel sensing technology across import and domestic applications, and this sensor reflects that OE-focused approach. If you are replacing a failed upstream sensor on a Mazda MX-5 Miata, NTK 27034 provides a direct-fit solution with the correct 5-wire layout and application-specific construction.

What It Is Used For

• Replacing a faulty upstream air/fuel ratio sensor
• Restoring proper exhaust feedback to the engine control system
• Addressing sensor-related drivability or fuel control issues
• Correcting warning lights tied to air/fuel sensor performance
• Returning the vehicle to the original sensor configuration

Installation Notes and Tips

Verify the connector, thread size, and harness length before installation. This sensor is a specific-fit part, so confirm the application matches the listed Mazda MX-5 Miata coverage and upstream position. The mounting bracket is not included. Use the part number 27034 to confirm the correct replacement before service.

Quality Assurance

NTK states that its oxygen sensors are extensively tested during manufacturing to meet or exceed OE specifications. The brand also draws on its ceramics and sensor manufacturing expertise to support fit, form, and function on application-specific replacements like NTK 27034.