NTK 22018 Oxygen Sensor - Downstream

Direct Fit Oxygen Sensor

NTK Oxygen Sensor 22018 is a specific-fit, heated oxygen sensor built for emission control applications that require threaded mounting and a 4-wire configuration. It is listed for Mazda 6 downstream fitments with California and Federal emissions coverage.

As part of NTK’s Direct Fit Oxygen Sensor line, this unit is engineered for straightforward replacement with the correct connector and sensor design for the application. NTK 22018 is a practical choice when you need OE-style fit, form, and function in a direct-fit oxygen sensor.

Key Features

• Heated oxygen sensor design for faster operating response.
• Specific-fit application for direct replacement use.
• Threaded mounting type with 18 mm thread diameter.
• 4-wire configuration with 21.75 in. wiring harness length.
• NTK part number 22018 for catalog matching and service lookup.

Fitment Details

Fits 2006-2008 Mazda 6, downstream.

Fits 2006-2008 Mazda 6, downstream.

This part cross-references Bosch 15386 and DENSO Auto Parts 234-4394 for the same application.

What It Helps Address

• Faulty oxygen sensor readings.
• Emission system warning lights.
• Incorrect air-fuel mixture feedback.
• Downstream sensor replacement needs on the Mazda 6.

Installation Notes and Tips

Confirm the downstream location, emissions type, and connector match before installation. Verify thread diameter and harness length against the original sensor, and use the part number 22018 to confirm application details.

Quality Assurance

NTK is part of the NGK family of products and is a major original equipment oxygen sensor supplier. NTK oxygen sensors are manufactured and tested to meet or exceed OE specifications for fit, form, and function.