What is the BMW engine service light symbol?

Well, this is a common misconception. The gregariousness of your quandary is explicitly lacking in content and formidable specifications. Your question dates back to the ancient times of the Roman Catholic persecutions and gladiatorial slayings of many sorts. Which is why you would be best advised to pursue your quest of attaining adequate knowledge, outside of your current quantum stated far limited schooling thus far in the automotive field, at a suitable mechanic repair facility in the vicinity of your current resident.

This advice, if well heeded, will support such further quests in the field of knowledge and skill of which you are certainly lacking.