Denso Air/Fuel Ratio Sensors

4.77 out of 5 stars 22 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

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Results 1 - 25 of 295

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

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

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: Monday 2/16/2026 if shipped by air

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Estimated Ship Date: Monday 2/16/2026 if shipped by air

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: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-9140

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

Part Number: DNP-234-9140

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-5003

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

Part Number: DNP-234-5003

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 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: Monday 2/16/2026 if shipped by air

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Estimated Ship Date: Monday 2/16/2026 if shipped by air

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: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-9042

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

Part Number: DNP-234-9042

Not Yet Reviewed

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Estimated Ship Date: Monday 2/16/2026 if shipped by air

Denso Air/Fuel Ratio Sensors 234-5098

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

Part Number: DNP-234-5098

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-5175

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

Part Number: DNP-234-5175

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered 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: Monday 2/16/2026 if shipped by air

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Estimated Ship Date: Monday 2/16/2026 if shipped by air

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: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 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: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-9026

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

Part Number: DNP-234-9026

Not Yet Reviewed

Estimated Ship Date: Monday 2/16/2026 if shipped by air

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Estimated Ship Date: Monday 2/16/2026 if shipped by air

Denso Air/Fuel Ratio Sensors 234-9022

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

Part Number: DNP-234-9022

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 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: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-9050

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

Part Number: DNP-234-9050

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 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: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-5174

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

Part Number: DNP-234-5174

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Denso Air/Fuel Ratio Sensors for 2002-2004 RSX, CR-V, 2001-2005 CIVIC - 234-9005

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

Part Number: DNP-234-9005

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Denso Air/Fuel Ratio Sensors for 2014-2018 3, 2014-2017 6, 2013-2018 CX-5 - 234-5059

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

Part Number: DNP-234-5059

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Denso Air/Fuel Ratio Sensors 234-9038

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

Part Number: DNP-234-9038

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 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: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 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: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Denso Air/Fuel Ratio Sensors for 2016-2018 ALTIMA - 234-9134

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

Part Number: DNP-234-9134

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

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