NTK 25670 oxygen sensor for the 2004-2009 Mazda 3 4-cylinder 2.0L, the 2006-2009 3 4-cylinder 2.3L and other vehicles measures oxygen in the exhaust and sends closed-loop feedback to the engine computer. That feedback helps control the air-fuel ratio and lets the OBDII system flag possible fuel delivery or catalytic converter efficiency problems.
A worn sensor can show up as a check engine light, a rough idle or lower fuel economy. Before you replace this oxygen sensor, rule out an exhaust leak, damaged wiring and fuel or ignition faults, because each of them can trigger a similar light or drivability complaint. The design is updated with the latest OE technology to reduce the failures seen in original sensors.
The 2004-2009 Mazda 3 4-cylinder 2.0L, the 2011-2014 Mazda 2 4-cylinder 1.5L and the 2009 Mazda 3 Sport 4-cylinder 2.0L are all fits for this oxygen sensor, and it fits other vehicles too. This listing is one sensor, and the application calls for a single sensor per vehicle.
Fit and size
Build and materials
Product information is for general reference and may contain errors. See our Disclaimer.
Is the NTK 25670 the right oxygen sensor for a 2011-2014 Mazda 2 4-cylinder 1.5L?
Yes. The NTK 25670 is listed for the 2011-2014 Mazda 2 4-cylinder 1.5L, which takes one sensor. If your car is a different one, look up its year, model and engine in the "Vehicles it fits" section.
What thread and wrench size does the NTK 25670 oxygen sensor use?
The NTK 25670 has an M18 - 1.5 metric thread and takes a 7/8 (22mm) wrench. It mounts by threading into place.
What connector and wiring does this oxygen sensor have?
It has four wires, a 33.50 inch harness and a female blade connector with four terminals. Water-resistant connectors and harness accessory hardware come with it for installation.
Can a worn oxygen sensor lead to a check engine light or poor fuel economy?
It can, since the sensor feeds air-fuel information to the engine computer. A shop can test the sensor with the engine running to confirm its condition.
What testing does this NTK oxygen sensor go through?
Development of the NTK 25670 includes vibration and thermal shock testing. The sensor is also tested during manufacturing.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
