NTK 24442 Oxygen Sensor - Downstream

NTK Direct Fit Oxygen Sensor for Mazda 3

NTK Part Number 24442 is a direct fit heated oxygen sensor for the downstream position on select 2007-2013 Mazda 3 models. Built as a specific-fit replacement, it is intended to match OE-style sensor placement, connector layout, and signal performance for the listed application.

Key Features

• Direct fit oxygen sensor for the downstream location
• Heated sensor design for faster operating response
• Specific-fit configuration for the listed Mazda 3 application
• 4-wire design with 14.25 in. wiring harness length
• 18 mm threaded mounting type
• NTK oxygen sensor technology from an OE-focused sensor manufacturer

Product Details

NTK Direct Fit Oxygen Sensor 24442 is engineered for 2007-2013 Mazda 3 downstream service, including B1S2 oxygen sensor applications that meet OEM standards. NTK develops oxygen sensors with ceramic-based manufacturing control and extensive production testing to support fit, form, and function aligned with original equipment requirements. This part number is also referenced as Bosch 18073 and DENSO Auto Parts 234-4391 for the same application.

For buyers searching for a 2007 Mazda 3 downstream oxygen sensor, a 2010 Mazda 3 heated O2 sensor, or an OE-style replacement for 2013 Mazda 3 emissions control service, NTK 24442 provides a direct-fit option for the listed vehicle range.

Common Issues This Part May Address

• Check engine light related to downstream oxygen sensor performance
• Fault codes tied to oxygen sensor heater circuit operation
• Slow or inaccurate exhaust oxygen readings
• Emissions test failure caused by a worn sensor
• Rough fuel control feedback from a degraded sensor signal

Installation Notes and Tips

Verify the downstream position before installation and confirm the connector, thread size, and harness length match the original sensor. Inspect the exhaust bung threads and wiring routing before tightening the sensor to avoid cross-threading or harness strain. Clear diagnostic trouble codes after installation and confirm the repair with a scan tool if the vehicle previously stored oxygen sensor faults.

Quality Assurance

NTK is a major original equipment oxygen sensor supplier, and this part is manufactured and tested to meet or exceed OE specifications for the listed Mazda 3 applications. The NTK Direct Fit Oxygen Sensor line is built to support accurate replacement selection for import and domestic vehicles.