NGK OZA751-EE8-90165 Oxygen Sensor 90165 Overall Length 750mm

【NGK OZA751-EE8-90165 Oxygen Sensor 90165 Total Length 750mm O2】
■Product Description
NTK O2 Sensor for detecting ideal air-fuel ratio
Advanced control is necessary 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 stoichiometric air-fuel ratio "λ (lambda) = 1*2." If the fuel is rich compared to the stoichiometric air-fuel ratio according to the signal from the O2 sensor, the ECU thins the fuel. If it is lean, the ECU enriches the fuel, thereby controlling the engine near the stoichiometric air-fuel ratio, which most effectively purifies harmful substances in the exhaust gas. Thus, the NTK O2 sensor is an important component in reducing harmful substances in exhaust gas.

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 are characterized by detecting the difference in oxygen concentration between the inside and outside of the element (atmosphere and exhaust gas) and feeding back to the ECU whether the fuel is rich or lean relative to the stoichiometric air-fuel ratio.
Full-range air-fuel ratio sensors can detect how rich or lean the fuel is relative to the stoichiometric air-fuel ratio. Therefore, more precise engine control is possible than with zirconia O2 sensors. It also enables engine control other than the stoichiometric air-fuel ratio (λ=1), such as lean-burn control. Additionally, 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 (starts operating within 5 seconds of the engine key being 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 have combustion products adhering to them, working in very harsh environments.
Using a deteriorated or damaged O2 sensor can lead to various problems.
More than 5 years or 80,000 km from new*
*Varies depending on vehicle usage.
Total length: 750mm
Total length is the length from the gasket to the tip of the connector.
Compatible manufacturer: Toyota
Compatible genuine part number: 89465-30640

■Notes on images
*Images are for illustration purposes only. Includes products with different sizes and colors. Product designs and specifications may change without prior notice. Please understand.

■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 the correct O2 sensor part number listed in this document.
(4) It may not function properly if used in modified vehicles.
(5) Please be careful as dropping or impacting the sensor may cause the internal ceramic element to break.
(6) Anti-seize agent is applied to the threaded part of the sensor. To prevent adhesion of dirt, etc.,
remove the protective cap just before installing the sensor.
(7) Do not wipe off the anti-seize agent.
(8) If the anti-seize agent gets on your hands or other parts of your body, 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) To install the sensor, thread it in with your fingertips, and then use a wrench to tighten it to the following approximate torque.
【Part numbers starting with "LZA", "OZA", "OZR", "UAR"】:
Sensors with 18mm thread diameter, 1.5mm pitch, Hex22mm = approximately 45-55 N・m (4.5-5.5 kgf・m)
(12) Do not allow the lead wire or connector to touch 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 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.,
and be sure to clear (reset) the diagnostic (self-diagnosis/OBD) error code.
Failure to clear the error code may lead to problems such as the MIL not turning off.