HUMBL — Performance & OE Car Parts, Tools, Coilovers, Exhausts & Sensors. Enthusiast-run auto parts store shipping worldwide from the USA, every part tested on our own project cars.

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BMW F30 340i Downstream Oxygen (O2) Sensor

SKU F30-340I-O2D
Price

$134.99

The downstream oxygen sensor sits after the catalytic converter and monitors its efficiency, feeding data back to the engine computer. A failing sensor commonly triggers a catalyst-efficiency check engine light even when the converter itself is fine.

This sensor is built to fit the BMW F30 340i (N55 turbo inline-six), matching the OEM connector and thread pitch for a straightforward install.

Reliable, accurately calibrated construction helps eliminate false codes and keeps your emissions monitoring working as intended.

Reference: OE/interchange WALKER

Quantity

New

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What they’re saying

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"Incredible service. Needed a specific sensor fast and it arrived a day early. The site is simple to use. Finally found a reliable parts source!"
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