BMW E90 328i Upstream Oxygen (O2) Sensor
$104.99
The upstream oxygen sensor measures exhaust gas before the catalytic converter, letting the engine computer fine-tune the air-fuel mixture in real time. A failing sensor can cause poor fuel economy, rough idle, or a check engine light for a fuel trim fault.
This O2 sensor is built for the BMW E90 3-Series 328i (3.0L I6 N52), matching the factory thread size and connector for the upstream exhaust position.
Made to OEM specifications for accurate readings, it helps restore proper fuel mixture control and engine efficiency.
Reference: OE/interchange SK25025046
Quantity
New
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