NTK 24027 Oxygen Sensor - Upstream Left

Direct Fit Oxygen Sensor

NTK 24027 is a specific-fit oxygen sensor built for emission control applications that require a threaded, heated design. It is engineered for accurate signal response and OE-style fitment, with coverage for the Mazda 929 upstream left application listed below.

• Heated oxygen sensor design for stable operation.
• Specific-fit replacement for direct application matching.
• Threaded mounting with an 18 mm thread diameter.
• 4-wire configuration with a 15.75-inch harness length.

Detailed Application

NTK 24027 is part of NTK’s Direct Fit Oxygen Sensor line, which focuses on application-specific replacement sensors rather than universal parts. As a sensor specialist within the NGK family, NTK uses ceramic-based manufacturing control and extensive testing to deliver fit, form, and function aligned with OE expectations. This oxygen sensor is listed for the 1992-1995 Mazda 929, upstream left, bank 2 sensor 1, and is a direct-fit option for that emission control location. This part cross-references DENSO Auto Parts 234-4067 for the same application.

What It Helps Address

• Faulty oxygen sensor readings that can trigger a check engine light.
• Slow or unstable sensor response in the exhaust stream.
• Emission control issues tied to incorrect air-fuel feedback.
• Fitment problems caused by using a universal sensor instead of a specific-fit part.

Installation Notes

Verify the connector style, wire count, thread diameter, and harness length before installation. Confirm the vehicle’s upstream left, bank 2 sensor 1 location matches the listed application for the Mazda 929. Threaded installation requires proper removal and tightening practices to avoid damage to the sensor or exhaust bung.

Quality Assurance

NTK states that these oxygen sensors are extensively tested during manufacturing and built to meet or exceed OE specifications. The brand is recognized as a major original equipment oxygen sensor supplier, and the Direct Fit Oxygen Sensor line is intended to streamline replacement selection for specific applications.