We've all had it happen. You're cruising down the highway, blaring your favorite tunes and, all of a sudden, a slight glow emanates from your dashboard. Looking down, you notice that your check engine light has come on. Panicked, you pull off at the next exit and frantically Google for an explanation or, perhaps, a nearby BMW repair shop. If this sounds at all familiar, this week's article is just for you because, in this post, we're going to look at a few reasons that explain why your BMW check engine light is on.