Oxygen Sensors

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Oxygen sensors—often called O2 sensors—are the vital link between your engine’s air-fuel mixture and the ECU. A failing sensor can trigger a check-engine light, hurt fuel economy, and cause rough running or emissions test failures. This collection brings together replacement oxygen sensors for a broad range of vehicles, from universal narrowband sensors to direct-fit wideband units, so you can get the right signal back to your ECU.

When choosing a sensor, pay attention to the type your vehicle requires: narrowband (switching) sensors cycle between rich and lean for basic fuel control, while wideband sensors deliver a precise air-fuel ratio reading for modern lean-burn and performance applications. Location matters too—upstream (pre-catalytic converter) sensors directly influence fuel trims, while downstream sensors monitor converter efficiency. Most current designs are heated (4-wire or more) for faster closed-loop activation and stable output at idle. We stock sensors with OE-style connectors to simplify installation and those with universal wiring for custom setups.

Replacing an aging oxygen sensor is one of the most cost-effective ways to restore factory fuel maps, reduce emissions, and keep your powertrain running smoothly. Browse the selection to find the right sensor type, thread size, and harness length for your application.

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Oxygen Sensors

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