NGK OZA751-EE11-91013 Oxygen Sensor 91013 Total Length 275mm

【NGK OZA751-EE11-91013 Oxygen Sensor 91013 Total Length 275mm O2】
■Product Description
NTK O2 Sensor for detecting ideal air-fuel ratio
Advanced control is required to reduce harmful substances (HC, CO, NOx) in exhaust gas. The O2 sensor plays an important role in detecting the oxygen concentration in the exhaust gas and feeding it back to the ECU*1.
The NTK O2 sensor detects the oxygen concentration in the exhaust gas and feeds it back to the ECU so that the fuel-air mixture ratio (air-fuel ratio) becomes the optimal theoretical air-fuel ratio "λ (lambda) = 1*2". If the ECU determines from the O2 sensor signal that the fuel is rich relative to the theoretical air-fuel ratio, it thins the fuel. If it is lean, it thickens the fuel, thereby controlling the engine near the theoretical air-fuel ratio where harmful substances in the exhaust gas are most effectively purified. Thus, the NTK O2 sensor is an important part in reducing harmful substances in exhaust gas.

Specifications
【Features and Structure】
A zirconia element has 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 theoretical air-fuel ratio.
Full-range air-fuel ratio sensors can detect how rich or lean the mixture is relative to the theoretical air-fuel ratio. Therefore, more precise engine control is possible than with zirconia O2 sensors. It also enables engine control with air-fuel ratios other than the theoretical air-fuel ratio (λ=1), such as lean burn control. In addition, there are early-activation full-range air-fuel ratio sensors that maintain the characteristics of conventional full-range air-fuel ratio sensors while improving heat resistance and durability, and achieve early activation (operation starts within 5 seconds after the engine key is turned ON) due to the integrated structure of the element and heater.
【Need for Replacement】
O2 sensors are constantly exposed to exhaust gas exceeding 600°C and accumulate combustion byproducts, 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 from a new car*
*Varies depending on vehicle usage.
Total length: 275mm
Total length is the length from the gasket to the tip of the connector.
Compatible manufacturer: Mazda
Compatible genuine part number: N3H3-18-861B

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

■Precautions
O2 sensors are specially designed for each vehicle model and engine, so they are not interchangeable with other types.
(1) Always stop the engine before inspecting, replacing, or adjusting.
(2) Inspect and replace according to the service manual of each automobile manufacturer.
(3) Use an O2 sensor with the correct part number as described in this document.
(4) It may not function properly if used in modified vehicles, etc.
(5) Be careful, as dropping or impacting the sensor may crack the internal ceramic element.
(6) Anti-seize agent is applied to the threaded part of the sensor. To prevent dust from adhering,
remove the protective cap just before installing the sensor.
(7) Do not wipe off the anti-seize agent.
(8) If anti-seize agent gets on your hands, etc., wash it off immediately with water.
➈ Do not twist or bend the lead wire fixed to the main body.
➉ Do not use an impact wrench when installing the sensor.
(11) When installing the sensor, screw it in with your fingertips, 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, Hex 22mm = approx. 45-55N·m (4.5-5.5kgf·m)
(12) Do not allow lead wires or connectors to touch the exhaust manifold or other hot parts.
(13) Route the lead wire as per the original and securely attach the connector.
(14) Depending on the condition of your vehicle, replacing the O2 sensor alone may not resolve the problem.
(15) When the MIL illuminates, before (or after) replacing the sensor, follow the service manual etc. to
always clear (reset) the error code in the diagnosis (self-diagnosis/OBD).
Failure to clear the error code may lead to problems such as the MIL not turning off.