Seller notes

For sale is a Subaru Crosstrek, Forester, Impreza, Outback, WRX, STi Mass Air Flow sensor. The sensor I believe might have been installed but since it didn't fix the problem it was returned. It was a throw away part so it was given to me. This is being sold for much cheaper than a brand new one will be. This airflow sensor measures air coming into the engine. This helps the computer know how to manage fuel trims and other engine efficiency sensors. Any unmetered air (after the sensor) usually th...

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