O2 Sensors, Oxygen Sensors - Narrowband, Wideband, Upstream, Downstream, Denso, O2 Sensors

The oxygen sensor, or O2 sensor, measures the amount of oxygen in your vehicle’s exhaust gases. Your engine’s computer uses this data to help figure out...

The oxygen sensor, or O2 sensor, measures the amount of oxygen in your vehicle’s exhaust gases. Your engine’s computer uses this data to help figure out the current air/fuel ratio, which allows it to maintain fuel efficiency and emissions standards. If your ride starts running rough, you may need to clean or replace this important sensor. Fortunately, you’re at the right place to get the replacement oxygen sensor you need—Summit Racing Equipment!

Narrowband vs. Wideband

A narrowband O2 sensor only informs the computer if your engine is running rich or lean. A wideband sensor measures how rich or...

Narrowband vs. Wideband

A narrowband O2 sensor only informs the computer if your engine is running rich or lean. A wideband sensor measures how rich or how lean the ratio is.

Upstream vs. Downstream

Upstream O2 sensors are positioned before the catalytic converter; downstream sensors are after it.

Top Brands

Oxygen (O2) sensors are crucial to your fuel-injected car, so Summit only carries reliable brands, including, Bosch, NTK, ACDelco, Denso, Holley, and E3 Spark Plugs.

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ACDelco GM Genuine Parts Oxygen Sensors 19178930

Oxygen Sensor, 4-Wire, 0-1 V, Pontiac, Chevy, Small Block, V8, Front, Each

Part Number: ADO-AFS75

4.25 out of 5 stars ( 8 )

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Denso Oxygen Sensors 234-4337

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Buick, Cadillac, Chevrolet, GMC, Hummer, Each

Part Number: DNP-234-4337

4.0 out of 5 stars ( 4 )

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Denso Oxygen Sensors for 2005-2013 CORVETTE, 2006-2007 HHR - 234-4332

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

Part Number: DNP-234-4332

5.0 out of 5 stars ( 1 )

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Denso Oxygen Sensors 234-4668

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Buick, Cadillac, Chevrolet, GMC, Isuzu, Pontiac, Saturn, Each

Part Number: DNP-234-4668

5.0 out of 5 stars ( 3 )

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Denso Oxygen Sensors 234-4669

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Cadillac, Chevrolet, GMC, Hummer, Each

Part Number: DNP-234-4669

4.86 out of 5 stars ( 7 )

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Denso Oxygen Sensors 234-4012

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, for use on Acura®, Buick, Cadillac, Chevrolet, Daewoo, GMC, Honda®, Oldsmobile, Pontiac, Each

Part Number: DNP-234-4012

5.0 out of 5 stars ( 2 )

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Denso Oxygen Sensors 234-4018

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Buick, Cadillac, Chevrolet, GMC, Oldsmobile, Pontiac, Each

Part Number: DNP-234-4018

5.0 out of 5 stars ( 3 )

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Denso Oxygen Sensors 234-4651

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Pontiac, Saab, Saturn, Each

Part Number: DNP-234-4651

5.0 out of 5 stars ( 2 )

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Denso Oxygen Sensors 234-4210

Oxygen Sensor, Universal, Heated, Thread-In Mounting, Each

Part Number: DNP-234-4210

5.0 out of 5 stars ( 1 )

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Denso Oxygen Sensors 234-4256

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

Part Number: DNP-234-4256

4.5 out of 5 stars ( 2 )

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Denso Oxygen Sensors 234-4209

Oxygen Sensor, Universal, Heated, Thread-In Mounting, Each

Part Number: DNP-234-4209

3.6 out of 5 stars ( 5 )

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Denso Oxygen Sensors 234-4650

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Buick, Cadillac, Chevrolet, GMC, for use on Honda®, Isuzu, Oldsmobile, Pontiac, Each

Part Number: DNP-234-4650

5.0 out of 5 stars ( 1 )

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Denso Oxygen Sensors 234-4087

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Buick, Chevrolet, GMC, Isuzu, Oldsmobile, Pontiac, Each

Part Number: DNP-234-4087

4.67 out of 5 stars ( 3 )

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Denso Oxygen Sensors 234-4025

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

Part Number: DNP-234-4025

5.0 out of 5 stars ( 2 )

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Denso Oxygen Sensors 234-8081

Oxygen Sensors, Thread-in, 4-wire, 0-1 V, Cadillac, Chevrolet, GMC, Each

Part Number: DNP-234-8081

Not Yet Reviewed

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Denso Oxygen Sensors 234-4112

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Each

Part Number: DNP-234-4112

Not Yet Reviewed

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Denso Oxygen Sensors 234-4019

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Chevrolet, GMC, Each

Part Number: DNP-234-4019

Not Yet Reviewed

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Denso Oxygen Sensors 234-8088

DENSO Oxygen Sensor

Part Number: DNP-234-8088

Not Yet Reviewed

Estimated Ship Date: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

Denso Oxygen Sensors 234-4610

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

Part Number: DNP-234-4610

3.0 out of 5 stars ( 1 )

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Denso Oxygen Sensors 234-4127

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

Part Number: DNP-234-4127

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Denso Oxygen Sensors 234-4401

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

Part Number: DNP-234-4401

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Denso Oxygen Sensors 234-4000

Oxygen Sensor, Universal, Heated, Thread-In Mounting, Each

Part Number: DNP-234-4000

Not Yet Reviewed

Estimated Ship Date: Oct 10, 2025 if ordered today

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Estimated Ship Date: Oct 10, 2025 if ordered today

Denso Oxygen Sensors 234-8085

DENSO Oxygen Sensor

Part Number: DNP-234-8085

Not Yet Reviewed

Estimated Ship Date: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

Denso Oxygen Sensors 234-4103

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Buick, Cadillac, Chevrolet, GMC, Pontiac, Each

Part Number: DNP-234-4103

Not Yet Reviewed

Estimated Ship Date: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

Denso Oxygen Sensors 234-3005

Oxygen Sensor, OE Style, Heated, Thread-In Mounting, Chevrolet, GMC, Jeep, Oldsmobile, Each

Part Number: DNP-234-3005

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

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