Kwiksen 234-9145 Air Fuel Ratio Oxygen Sensor Upstream Replacement for GS350 2014 2015/ SEQUOIA 2014 2015 2016 2017/ Tundra V8 4.6L 2014-2016

Out of stock
Please check fitment notes & description for accurate information.


Brand New
Direct Plug-In Replacement.
4 wire configuration
Interchange Part Number: 234-9145, 894670C060, 894670C070, 8946753060, 8946760140

Fit Vehicles:
Wiring Harness Length: 420mm/16.53 inch
Warranty: 1 Year
Built and tested to strict quality control standards

2014-2015 Lexus GS350 V6 3.5L, Upstream Left, RWD
2014-2016 Lexus GX460 V8 4.6L, Upstream
2014-2015 Lexus IS250 V6 2.5L, Upstream Left, RWD
2014-2016 Lexus IS350 V6 3.5L, Upstream Left, RWD
2014-2016 Toyota Land Cruiser V8 5.7L, Upstream
2014-2016 Lexus LS460 V8 4.6L, Upstream, AWD
2016 Lexus LS600h V8 5.0L, Upstream
2014-2016 Lexus LX570 V8 5.7L, Upstream
2015-2016 Lexus RC350 V6 3.5L, Upstream Left, RWD
2014-2016 Toyota Sequoia V8 5.7L, Upstream, Flex Fuel Engine
2015 Toyota Tacoma V6 4.0L, Upstream
2013 Toyota Tundra V8 5.7L, Upstream left, Flex Fuel Engine
2014-2016 Toyota Tundra V8 4.6L, Upstream

 Package Includes:

1x Upstream Air Fuel Ratio Sensor

Must Know Before Buying:

The following information is for instructional and guidance reference only. We try and make them as accurate as we can.

If Check Engine Light is on or an OBDII Trouble/Fault code occurs after installation, check the sensor with a voltmeter as below. If the sensor is good, further diagnosis is required. There're many different codes for specific functional failures, which are NOT necessarily relevant to the sensor. Find out what the Code means before leaving any feedbacks.

Items that have been installed, altered or contaminated are non-returnable. ONLY a defective sensor after tested by a voltmeter is applied to the manufacturer warranty. 

20% restocking fee is required if the buyer bought wrong items due to not paying attention to fitment information and ask for a return.

The Price, Quality & Functionality of the O2 Sensor is fully covered under our warranty & return policy. However, a refund for any labor cost, expense in a dealer shop or damage due to the wrong installation is NOT covered.

Q: How do I know the O2 sensor is good or not? (Online Video)

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, the 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.

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