Denso Air/Fuel Ratio Sensors

4.78 out of 5 stars 23 Customer Reviews

Denso air/fuel ratio sensors (A/F sensors) were developed to measure air-to-fuel ratios under a wider range of driving conditions than oxygen sensors. A/F sensors,

Denso air/fuel ratio sensors (A/F sensors) were developed to measure air-to-fuel ratios under a wider range of driving conditions than oxygen sensors. A/F sensors, also known as wide-band oxygen sensors, send information to the engine management computer to make adjustments based on driving conditions. Their wider range and variable adjustments allow engines to burn fuel more efficiently and produce fewer emissions.

As A/F sensor technology has evolved, Denso has been there every step of the way. From the first thimble-type sensors to today's heated, quick-response sensors required to meet ever more stringent emissions regulations, Denso has supplied OEMs with quality components and continues to innovate. Denso helped to develop this important technology and you can rely on Denso First Time Fit A/F sensors.

Features and benefits of Denso air/fuel ratio sensors include:

* Tarnish-proof platinum electrode provides longer life and maintains accuracy
* Quick-response planar zirconia element quickly detects oxygen concentration
* Measures air/fuel ratios from approximately 12:1 to 19:1
* Increased performance by mapping air/fuel ratios throughout the RPM range
* Lower emissions by optimizing the air/fuel mixture
* Reduces fuel consumption and maximizes catalytic converter life
* First Time Fit design delivers the right part the first time

Showing In Stock Items. Show All 303 Items.

Results 1 - 25 of 295

Denso Air/Fuel Ratio Sensors 234-9051

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Lexus, Toyota, Each

Part Number: DNP-234-9051

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Denso Air/Fuel Ratio Sensors 234-9049

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Lexus, Scion, Toyota, Each

Part Number: DNP-234-9049

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

Denso Air/Fuel Ratio Sensors for 1999-2002 4RUNNER, 2000-2004 TACOMA - 234-9002

Oxygen Sensor, OE Style, Heated, Flange Mount, Toyota, Each

Part Number: DNP-234-9002

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-5010

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, for use on Acura®, Honda®, Saturn, Each

Part Number: DNP-234-5010

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Denso Air/Fuel Ratio Sensors 234-9135

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Chevrolet, for Infiniti, for Nissan, Each

Part Number: DNP-234-9135

Not Yet Reviewed

Estimated Ship Date: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-5113

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Ford, Lincoln, Mazda, Mercury, Each

Part Number: DNP-234-5113

Not Yet Reviewed

Estimated Ship Date: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

Denso Air/Fuel Ratio Sensors for 2000-2004 TUNDRA, TACOMA, 2000 4RUNNER - 234-9001

Oxygen Sensor, OE Style, Heated, Flange Mount, Toyota, Each

Part Number: DNP-234-9001

5.0 out of 5 stars ( 7 )

Estimated Ship Date: Apr 23, 2026 if ordered today

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Estimated Ship Date: Apr 23, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-9304

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Lexus, Toyota, Each

Part Number: DNP-234-9304

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-5137

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, BMW, Each

Part Number: DNP-234-5137

Not Yet Reviewed

Estimated Ship Date: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-5060

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, for Infiniti, for Nissan, Each

Part Number: DNP-234-5060

Not Yet Reviewed

Estimated Ship Date: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-5056

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, for use on Acura®, Honda®, for Hyundai, Each

Part Number: DNP-234-5056

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Denso Air/Fuel Ratio Sensors for 2008-2012 ACCORD, 2010-2011 CR-V, 2009-2014 TSX - 234-9091

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, for use on Acura®, Honda®, Each

Part Number: DNP-234-9091

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-5076

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Ford, Lincoln, Each

Part Number: DNP-234-5076

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-9138

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Subaru, Volkswagen, Each

Part Number: DNP-234-9138

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-9123

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Saab, Subaru, Each

Part Number: DNP-234-9123

Not Yet Reviewed

Estimated Ship Date: Apr 23, 2026 if ordered today

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Estimated Ship Date: Apr 23, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-9131

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, for use on Acura®, Honda®, Each

Part Number: DNP-234-9131

Not Yet Reviewed

Estimated Ship Date: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-5176

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Ford, Each

Part Number: DNP-234-5176

Not Yet Reviewed

Estimated Ship Date: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

Denso Air/Fuel Ratio Sensors for 2003-2007 ACCORD - 234-9040

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, for use on Honda®, Each

Part Number: DNP-234-9040

Not Yet Reviewed

Estimated Ship Date: Today

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Estimated Ship Date: Today

Denso Air/Fuel Ratio Sensors for 2006-2011 CIVIC - 234-9063

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, for use on Honda®, Each

Part Number: DNP-234-9063

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-9036

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, for Infiniti, for Nissan, Suzuki, Each

Part Number: DNP-234-9036

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-9007

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Lexus, Toyota, Each

Part Number: DNP-234-9007

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Denso Air/Fuel Ratio Sensors for 2005-2006 CR-V, RSX, 2003-2009 ELEMENT - 234-9064

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, for use on Acura®, Honda®, Each

Part Number: DNP-234-9064

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-9120

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Saab, Subaru, Each

Part Number: DNP-234-9120

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Denso Air/Fuel Ratio Sensors for 2014-2018 FORESTER, 2015-2021 WRX - 234-5178

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Subaru, Each

Part Number: DNP-234-5178

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Denso Air/Fuel Ratio Sensors for 2013-2017 LEGACY, OUTBACK - 234-9314

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Subaru, Each

Part Number: DNP-234-9314

Not Yet Reviewed

Estimated Ship Date: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

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