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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Bosch Premium Original Equipment-Type Oxygen Sensors 13111

Oxygen Sensor, OE Replacement, Each

Part Number: BCH-13111

5.0 out of 5 stars ( 4 )

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Delphi Oxygen Sensors ES10676

Oxygen Sensor, 2-wire, Thread-in, Chevy, GMC, Oldsmobile, Pontiac, Saturn, Each

Part Number: DFP-ES10676

Not Yet Reviewed

Estimated Ship Date: Mar 16, 2026 if ordered today

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Estimated Ship Date: Mar 16, 2026 if ordered today

Denso Oxygen Sensors 234-4000

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

Part Number: DNP-234-4000

Not Yet Reviewed

Estimated Ship Date: Mar 23, 2026 if ordered today

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Estimated Ship Date: Mar 23, 2026 if ordered today

Denso Oxygen Sensors 234-2000

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

Part Number: DNP-234-2000

Not Yet Reviewed

Estimated Ship Date: Mar 23, 2026 if ordered today

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Estimated Ship Date: Mar 23, 2026 if ordered today

Denso Oxygen Sensors 234-4090

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

Part Number: DNP-234-4090

Not Yet Reviewed

Estimated Ship Date: Mar 23, 2026 if ordered today

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Estimated Ship Date: Mar 23, 2026 if ordered today

Denso Oxygen Sensors 234-2060

Oxygen Sensor, OE Style, Unheated, Thread-In Mounting, Chevrolet, GMC, Oldsmobile, Pontiac, Saturn, Each

Part Number: DNP-234-2060

Not Yet Reviewed

Estimated Ship Date: Mar 23, 2026 if ordered today

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Estimated Ship Date: Mar 23, 2026 if ordered today

Delphi Oxygen Sensors ES20004

Oxygen Sensor, 4-wire, Thread-in, Saturn, Each

Part Number: DFP-ES20004

Not Yet Reviewed

Estimated Ship Date: Mar 16, 2026 if ordered today

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Estimated Ship Date: Mar 16, 2026 if ordered today

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 )

Estimated Ship Date: Today

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ACDelco GM Genuine Parts Oxygen Sensors 19178924

Oxygen Sensor, Thread-in, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: ADO-AFS123

5.0 out of 5 stars ( 10 )

Estimated Ship Date: Today

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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 )

Estimated Ship Date: Today

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Bosch Premium Original Equipment-Type Oxygen Sensors 13444

Oxygen Sensor, OE Replacement, Each

Part Number: BCH-13444

5.0 out of 5 stars ( 4 )

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Bosch Premium Original Equipment-Type Oxygen Sensors 15703

Oxygen Sensor, OE Replacement, Each

Part Number: BCH-15703

4.95 out of 5 stars ( 22 )

Estimated Ship Date: Today

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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 )

Estimated Ship Date: Today

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ACDelco GM Genuine Parts Oxygen Sensors for 1998-2002 CAMARO, FIREBIRD - 19355308

Oxygen Sensor, 4-wire, Thread-in, Wiring Harness, Cadillac, Chevy, Pontiac, Each

Part Number: ADO-AFS98

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Today

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NTK Oxygen Sensors 21006

Oxygen Sensor, 4-Wire, 0-1 V, Front, Each

Part Number: NGK-21006

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Today

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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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NTK Oxygen Sensors 21546

Oxygen Sensor, 4-Wire, 0-1 V, Chevy, GMC, 5.3L, V8, Each

Part Number: NGK-21546

5.0 out of 5 stars ( 5 )

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Bosch Premium Original Equipment-Type Oxygen Sensors 15741

Oxygen Sensors, Premium Original Equipment-Type, for Hyundai, for Nissan, Chevy, Chrysler, Fiat, Ford, Jeep, Saab, Subaru, Suzuki, Toyota, Volvo, Each

Part Number: BCH-15741

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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