NTK 22100 Oxygen Sensor - Downstream Front

Direct Fit Oxygen Sensor for Mazda 6

NTK Oxygen Sensor 22100 is a direct fit, heated oxygen sensor built for specific applications and engineered for accurate exhaust feedback. It is compatible with 2003-2005 Mazda 6 models in the downstream front position, including replacement needs for the B2S2 location.

NTK’s Direct Fit Oxygen Sensor line focuses on OE-style fit, form, and function for import and domestic vehicles. As part of the NGK family, NTK applies ceramic manufacturing expertise and extensive production testing to help deliver consistent sensor performance for modern emission control systems.

Key Features

• Direct fit oxygen sensor for specific vehicle applications
• Heated sensor design for faster operating response
• 4-wire configuration with a 36.25-inch wiring harness
• Threaded mounting type with 18 mm thread diameter
• Built for downstream front placement on select Mazda 6 models
• NTK part number 22100 for easy identification

Application Details

Fits 2003-2005 Mazda 6, downstream front. This NTK 22100 oxygen sensor is a specific-fit replacement for the B2S2 location and is intended for vehicles that require a direct-fit heated sensor in that exhaust position. If you are searching for a Mazda 6 downstream front oxygen sensor or an NTK 22100 replacement oxygen sensor, this part matches the listed application.

This part cross-references Bosch 15428 for the same application.

What It Helps Address

• Check engine light related to oxygen sensor performance
• Incorrect air-fuel feedback from a worn downstream sensor
• Emission control faults tied to exhaust monitoring
• Slow sensor response caused by age or contamination
• Fitment issues when replacing the original Mazda 6 sensor

Installation Notes and Tips

Confirm the downstream front position and B2S2 location before ordering. Match the 4-wire connector, threaded mount, and harness length to the original sensor on the vehicle. For best results, inspect the exhaust threads and wiring routing during installation to ensure a secure fit on the Mazda 6.

Quality Assurance

NTK manufactures oxygen sensors with OE-focused engineering and production testing to meet or exceed original equipment specifications. The brand’s sensor expertise and ceramic manufacturing background support consistent fit and reliable operation across listed applications.