NTK 24779 Oxygen Sensor - Downstream

Direct Fit Oxygen Sensor for Mazda 3

NTK Oxygen Sensor 24779 is a direct fit, heated downstream oxygen sensor for select Mazda 3 and Mazda 3 Sport applications with SkyActiv engines. Built as a specific-fit replacement, it matches OE-style mounting and electrical requirements for a straightforward repair on the exhaust system.

NTK’s Direct Fit Oxygen Sensor line focuses on OE application coverage and precise fitment. For Mazda 3 owners, this means a replacement sensor engineered around the original vehicle configuration, with the wiring harness length, thread size, and connector layout matched to the application.

Key Features

• Direct fit oxygen sensor for specific Mazda applications
• Heated sensor design for downstream exhaust monitoring
• 4-wire configuration for OE-style signal and heater circuit operation
• Threaded mounting type with 18 mm thread diameter
• 16.25 in. wiring harness length
• OE equivalent design for 2011-2013 Mazda 3 Sport and 2012-2013 Mazda 3

Product Details

NTK part number 24779 is an emission control oxygen sensor built for downstream placement on 2012-2013 Mazda 3 and 2011-2013 Mazda 3 Sport models equipped with SkyActiv engines. As part of NTK’s Direct Fit Oxygen Sensor line, it is produced with controlled ceramic technology and tested during manufacturing to meet or exceed OE specifications for fit, form, and function. This part cross-references Bosch 15429 for the same application.

Common Issues This Sensor Can Address

• Check engine light related to downstream oxygen sensor performance
• Fault codes tied to air-fuel ratio monitoring or catalyst efficiency
• Slow or inaccurate oxygen sensor response
• Damaged, corroded, or heat-aged original sensor wiring
• Replacement needs after exhaust service on Mazda 3 or Mazda 3 Sport

Installation Notes and Tips

Fits 2012-2013 Mazda 3, downstream, B1S2; SkyActiv Eng.; OE Equivalent Design; Direct Fit Oxygen Sensor. Fits 2011-2013 Mazda 3 Sport, downstream, B1S2; SkyActiv Eng.; OE Equivalent Design; Direct Fit Oxygen Sensor. Confirm the downstream sensor location before installation and verify the connector style, thread diameter, and harness routing against the original part. Use proper oxygen sensor service procedures to avoid damage to the sensor or exhaust threads.

Quality Assurance

NTK is a major original equipment oxygen sensor manufacturer with extensive OE application coverage. NTK 24779 is manufactured and tested to support reliable operation and OE-level specification matching for Mazda 3 and Mazda 3 Sport applications.