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Thread: EAC Sensor Malfunction

  1. #1
    Join Date
    Feb 2017
    Location
    Detroit
    Posts
    27
    My Cars
    BMW 128i

    EAC Sensor Malfunction

    Hi. I have a 2009 128i. The "Service Engine Soon" light came on. My mechanic told me the issue was the EAC (environmental air catalyst) sensor on the radiator. As I understand it, the purpose on the sensor is to check that the radiator is a magnesium-coated one, which cuts down ozone emissions. This is the original radiator so the sensor shouldn't be signaling a problem. Advice? I want to get my SES light off, but I don't want to spend $900 to replace the radiator which works fine, but just has a bad sensor.

    Any thoughts appreciated,

    Tony

  2. #2
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    9,933
    My Cars
    2018 BMW M240i
    Check www.realoem.com to see if the sensor can be replaced.

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