NGK 24173 O2 sensor for the 2010-2012 Mazda CX-7 4-cylinder 2.5L measures the oxygen in the exhaust and reports it back to the engine computer. That constant feedback helps the ECU control the air-fuel ratio and lets the OBDII system flag fuel delivery or catalytic converter efficiency problems.
A check engine light, rough running or higher fuel use can come from a worn sensor, but those signs alone do not prove it is the problem; a vacuum leak, for one, can bring on similar trouble.
This sensor is a direct-fit replacement for the 2010-2012 Mazda CX-7 4-cylinder 2.5L, which takes one. This listing is one sensor.
Fit and size
Build and materials
Does the NGK 24173 fit the 2010-2012 Mazda CX-7 4-cylinder 2.5L?
Yes. NGK 24173 is a direct-fit O2 sensor for the 2010-2012 Mazda CX-7 4-cylinder 2.5L, which takes one sensor.
What hex size and thread does the NGK 24173 have?
NGK 24173 has a 7/8" (22 mm) hex and an M18 - 1.5 thread.
Is this oxygen sensor heated?
Yes. This sensor is a heated, switching zirconia type with a ceramic sensing element.
What testing does the NGK 24173 go through?
Its development includes vibration and thermal shock testing, and the sensors are also tested during manufacturing.
What hookup hardware comes with this O2 sensor?
The sensor has a water-resistant connector and harness accessory hardware, provided to make installation easier.
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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.
