Bosch 13866 oxygen sensor for the 2001-2005 Mazda Miata 4-cylinder 1.8L sends air-fuel-ratio readings to the ECU from the downstream position. This Bosch O2 sensor helps the ECU keep combustion stable and emissions down.
A check engine light, rough running or poorer fuel economy can mean the oxygen sensor is wearing out, but other faults produce the same signs. With the engine off and cool, look over the sensor's wiring and connector for cracks, melted insulation or corrosion before you replace anything.
This sensor is a direct-fit replacement for the 2001-2005 Mazda Miata 4-cylinder 1.8L.
Fit and size
Build and materials
One oxygen sensor with its wiring harness; a mounting bracket is not included. This listing is one sensor, and the 2001-2005 Mazda Miata 4-cylinder 1.8L takes one.
Is this Miata oxygen sensor the right one for a 2001-2005 Mazda Miata 4-cylinder 1.8L?
Yes. Bosch 13866 is a downstream oxygen sensor that fits the 2001-2005 Mazda Miata 4-cylinder 1.8L, which takes one.
Is this Bosch premium oxygen sensor heated?
Yes. Bosch 13866 is a heated narrow-band sensor with an integrated heater element, and it reaches operating temperature in under 10 seconds.
What thread and hex size does this downstream oxygen sensor have?
It has an M18 - 1.5 thread and a 22 mm hex. The length from the sealing surface to the end of the connector is 40 in.
Does this oxygen sensor come with its wiring harness?
Yes, the wiring harness is included. A mounting bracket is not, and conductive anti-seize comes pre-applied on the threads.
What warranty covers the Bosch 13866 oxygen sensor?
Bosch backs it with a 1-year, unlimited-mileage warranty for non-commercial passenger cars and light trucks.
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.
