NGK OZA668-EE61-96405 Oxygen Sensor 96405 Total Length 225mm

【NGK OZA668-EE61-96405 Oxygen Sensor 96405 Total Length 225mm O2】
■Product Description
NTK O2 Sensor Detects 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 stoichiometric air-fuel ratio "λ (lambda) = 1*2." The ECU uses the signal from the O2 sensor to control the fuel. If the fuel is too rich compared to the stoichiometric air-fuel ratio, the ECU makes the fuel leaner. If the fuel is too lean, it makes the fuel richer, thus controlling the engine close to the stoichiometric air-fuel ratio, where harmful substances in the exhaust gas are most effectively purified. In this way, the NTK O2 sensor is an important component for reducing harmful substances in exhaust gas.

Specifications
【Features and Structure】
Zirconia elements have the characteristic of generating electromotive force due to differences in oxygen concentration at temperatures exceeding 300°C. Utilizing this characteristic, 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.
Wide-range air-fuel ratio sensors can detect how rich or lean the air-fuel ratio 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 outside the stoichiometric air-fuel ratio (λ=1), such as lean burn control. Furthermore, there are early-activation wide-range air-fuel ratio sensors that maintain the characteristics of conventional wide-range 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.
【Need for Replacement】
O2 sensors are constantly exposed to exhaust gases exceeding 600°C and accumulate combustion byproducts, working 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.
Total length: 225mm
Total length is the length from the gasket to the tip of the connector.
Compatible manufacturers: Subaru / Daihatsu
Compatible genuine part numbers: 89465-B2140, 89465-97508

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

■Precautions
O2 sensors are designed for specific vehicle models and engines, so they 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 listed in this document.
(4) It may not function correctly if used on modified vehicles.
(5) Be careful not to drop or subject the sensor to impact, as this may break the internal ceramic element.
(6) Anti-seize compound 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 compound.
(8) If the anti-seize compound 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 and then use a wrench to tighten it to the following torque specifications as a guide.
【Part numbers starting with "LZA", "OZA", "OZR", "UAR"】:
Sensors with thread diameter 18mm, pitch 1.5mm, Hex 22mm = approx. 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 high-temperature parts.
(13) Route the lead wire as originally installed and securely attach the connector.
(14) Depending on the vehicle's condition, replacing only the O2 sensor may not resolve the problem.
(15) If the MIL (Malfunction Indicator Light) illuminates, before (or after) replacing the sensor, follow the service manual, etc., and
always 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.