Specifications Electronic:No High-concerned chemical:None Type:Heating Type Sensor Type:Piezoelectric Origin:Mainland China OEM NO.:234-4169 234-4138 Resolution:Oxygen Sensor Replaces OEM Part Number: 234-4169 or 234-4138 "Please check the OE number clearly, confirm suited to your needs." Fit for: 1998-2000 Lexus GS400 V8 4.0L;Upstream 1995-2000 Lexus LS400 V8 4.0L;Upstream 2008-2015 Lexus LS600h V8 5.0L;Downstream Left 1998-2002 Lexus LX470 V8 4.7L;Upstream 2008-2013 Lexus LX570 V8 5.7L;Downstream Right 1996-2000 Lexus SC400 V8 4.0L;Upstream 2010 Toyota 4Runner L4 2.7L;RWD;Downstream 1998-2002 Toyota Land Cruiser V8 4.7L;Upstream 2008-2013 Toyota Land Cruiser V8 5.7L;Downstream Right 2001-2004 Toyota Sequoia V8 4.7L;Upstream 2000-2004 Toyota Tundra V8 4.7L;Upstream 2001-2007 Lexus GS430 V8 4.3L;Upstream Left 2003-2004 Lexus GX470 V8 4.7L;Upstream 2001-2006 Lexus LS430 V8 4.3L;Upstream Left 2003-2004 Lexus LX470 V8 4.7L;Upstream 2005 Lexus LX470 V8 4.7L;To 05/05;Upstream 2002-2010 Lexus SC430 V8 4.3L;Upstream Left 2003-2004 Toyota 4Runner V8 4.7L;Upstream 2010-2012 Toyota 4Runner V6 4.0L; Downstream Right 2010-2012 Toyota FJ Cruiser V6 4.0L;Downstream Right 2003-2004 Toyota Land Cruiser V8 4.7L;Upstream 2005 Toyota Land Cruiser V8 4.7L;To 05/05;Upstream Package included: 1* Oxygen Sensor Note: 1. Please check OEM number before purchasing. 2. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 3. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Must Know Before Buying: A: The only way to know if the O2 sensor is functioning normally is to check its responsiveness to changes in the air/fuel mixture, by Voltage Measurement or Waveform Simulation. Use a 10-megaohm digital voltmeter. Hook up the voltmeter's red probe to the sensor's signal wire and the black probe to engine ground. (Use back probe method, DO NOT pierce the wire.) For a good sensor, voltage should fluctuate constantly between 0.1 and 0.9 volts after starting the engine for 2 or 3 minutes. Please take a video clip of the voltmeter and contact us if our sensor: Goes above range between 0.1 and 0.9 volt Remains below 0.5 volts Stays fixed at a particular voltage You're free to choose replacement or refund if our sensor fails to work, in this case. Position confirmation: Upstream sensor is before the catalytic(cat.) converter. Downstream sensor is after the catalytic converter. Upstream oxygen sensor is also known as sensor 1, or pre-cat, or upper oxygen sensor. Downstream oxygen sensor is also known as sensor 2, or post-cat, or lower oxygen sensor. When should we replace the oxygen sensor : How to replace the oxygen sensor : Step 1 - Some sensors are equipped with a heat shield that must be removed before the sensor removal, this is performed by removing any mounting bolts. Step 2 - By using a regular socket it minimizes potential damage to the sensor body and the threads, this technique helps avoid stripping the old sensor upon removal. Step 3 - Then, locate and disconnect the wiring connector, this step should be done before removing the sensor if the wiring is still attached. Step 4 - Its important that the wiring harness connectors are exactly the same, each sensor is unique to it's position and is located in the system by its connector configuration. (Note: some replacement sensors have a universal electrical connector that must be configured to the wiring of the old sensor.) Step 5 - Use a small wire brush to help clean the threaded port to ensure a proper seal of the new sensor. Gently install the new oxygen sensor by hand while keeping the wiring and connector free from bends. Step 6 - Gently tighten the sensor while keeping wiring free from damage, these sensors need to be fairly snug to avoid leakage. Step 7 - Once the sensor is tightened, reinstall any heat shields or bracing that had to be removed. Step 8 - After the heat shield has been reinstalled, mount the connector to it's holder and reattach the connector back onto the wiring harness. If the car has diagnostic trouble codes, they will need to be cleared. 1.Our Working Time:(GMT+8)Monday to Saturday,8:00-18:00. 2.For inquires and customer support, please send your email to us.All emails will be responded to within 24 hours during business days. 3.Parts Information: Before purchase this parts, please check the compatibility information and verify the correct OEM part number. Generally,we accept the following payment methods:credit card;T/T;moneybookers;western union. And our protection only gives the pay-ment ways accepde by Aliexpress platform. 1.We will send the itens within 2-5 days(working days,not h