2000 BMW 328Ci Q&A

2000 BMW 328Ci Question: Why won't my car pass smog?

i just traded my 2005 Yamaha Raven R1 for 2000 328Ci BMW the day before yesterday. The problem: She won't pass smog. There are 3 problems with "no description available" and then multiple sensor problems along with "misfire" problems (but you would never know driving it). Does anyone have any idea what would cause this many problems? And about how much it will cost to repair? I've already spent $2000 on attempting to fix it. They still haven't found the problem, -
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