NGK OZA734-EJ1-93190 Oxygen Sensor 93190 Total length 380mm

【NGK OZA734-EJ1-93190 Oxygen Sensor 93190 Total length 380mm O2】
■Product Description
NTK O2 Sensor Detects Ideal Air-Fuel Ratio
Advanced control is required to reduce harmful substances (HC, CO, NOx) in exhaust gases, and O2 sensors play a crucial role by detecting the oxygen concentration in the exhaust gas and feeding it back to the ECU*1.
NTK O2 sensors detect the oxygen concentration in the exhaust gas and feed it back to the ECU so that the fuel-air mixture ratio (air-fuel ratio) is the optimal stoichiometric air-fuel ratio "λ (lambda) = 1*2". If the ECU receives a signal from the O2 sensor indicating that the fuel is too rich, it thins the fuel; if it's too lean, it enriches the fuel. This ensures control around the stoichiometric air-fuel ratio, where harmful substances in the exhaust gas are most effectively purified. Thus, NTK O2 sensors are crucial components for reducing harmful substances in exhaust gases.

Specifications
【Features and Structure】
Zirconia elements have the property of generating electromotive force due to differences in oxygen concentration at temperatures exceeding 300°C. Utilizing this property, zirconia type sensors detect the difference in oxygen concentration between the inside and outside of the element (atmosphere and exhaust gas) and feed back to the ECU whether the fuel is rich or lean relative to the stoichiometric air-fuel ratio.
Wideband air-fuel ratio sensors can detect how rich or lean the mixture is relative to the stoichiometric air-fuel ratio. This allows for more precise engine control than with zirconia O2 sensors. It also enables engine control outside of the stoichiometric air-fuel ratio (λ=1), such as lean burn control. Additionally, there are early activation type wideband air-fuel ratio sensors that maintain the characteristics of conventional wideband air-fuel ratio sensors while improving heat resistance and durability, and achieve early activation (starts operating within 5 seconds after the engine key is turned ON) due to the integrated structure of the element and heater.
【Necessity of Replacement】
O2 sensors are constantly exposed to exhaust gases exceeding 600°C and are subject to the adhesion of combustion products, operating in a very harsh environment.
Using a deteriorated or damaged O2 sensor can lead to various problems.
More than 5 years or 80,000 km since new*
*Varies depending on vehicle usage conditions.
Total length: 380mm
The total length is the length from the gasket to the tip of the connector.
Compatible Manufacturer: Mazda
Compatible Genuine Part Number: AZ46-18-861

■Notes on images
*Images are for illustration purposes only. They include products of different sizes and colors. Product designs and specifications are subject to change without notice. Please be aware.

■Precautions
O2 sensors are designed for specific vehicle models and engines, and are not interchangeable with other types.
(1) Always turn off the engine before inspection, replacement, or adjustment.
(2) Perform inspection and replacement according to the service manual of each automobile manufacturer.
(3) Use the correct O2 sensor part number specified in this document.
(4) Using it on modified vehicles may prevent it from functioning normally.
(5) Be careful not to drop it or subject it to impact, as the internal ceramic element may break.
(6) Anti-seize compound is applied to the threaded part of the sensor. To prevent adhesion of dirt, etc.,
remove the protective cap immediately before installing the sensor.
(7) Do not wipe off the anti-seize compound.
(8) If the anti-seize compound gets on your hands or other parts of your body, immediately wash it off with water.
➈ Do not twist or bend the lead wire fixed to the main unit.
➉ Do not use an impact wrench when installing the sensor.
(11) When installing the sensor, screw it in by hand, then use a wrench to tighten it to the following approximate torque:
【Part numbers starting with "LZA", "OZA", "OZR", "UAR"】:
Sensor with thread diameter 18mm, pitch 1.5mm, Hex22mm = approx. 45-55 N・m (4.5-5.5 kgf・m)
(12) Do not allow the lead wire or connector to come into contact with the exhaust manifold or other hot parts.
(13) Route the lead wire in the same way as the original, and securely attach the connector.
(14) Depending on the vehicle's condition, replacing only the O2 sensor may not resolve the problem.
(15) When the MIL illuminates, before (or after) replacing the sensor, follow the service manual, etc., and
be sure to clear (reset) the diagnostic (self-diagnosis/OBD) error codes.
Failure to clear the error codes may lead to problems such as the MIL not turning off.