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  1. e46 CPO doesn't cover software? TSB/DIY options?

    General E46 Forum
    Over Thanksgiving weekend my check engine light came on. I went to Autozone and it was diagnosed as a problem with the O2 sensor (bank2). I took it into BMW to get it fixed and was notified there was a technical service bullitin, that the problem didn't mean anything but would be fixed with a...