I bought a Kcan cable and downloaded the MHD app. That way you can plug it into the car and read any codes or shadow codes. Also, you can check the flash version. It was only 25 dollars. I almost bought a 35i locally then ran the test and found 2 problems, IBS missing and low oil lever. The owner says he changes the oil every 3k miles. Sounds like an oil leak or burning oil to me. If I didn't have the cable I wouldn't have known.
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