In case you are looking for a diagnostic tool for you BMW car, then you can get online and use the key words like BMW diagnostic tool, diagnostic tool for the BMW car, then there are many kinds of information will show to you in the search engine, in this case you should learn how to select the useful information, if not, it may be hard to make a choice which is the best information you are looking for. There is another choice you may go to the local distributor shop, ask them for help, they will give you suggeston. If you know some information about the auto diagnostic tool, then looking for the most useful information is a piece of cake for you. As far as I know there are many kinds of diagnostic tools can work on the BMW cars, such as the launch x431 master, autoboss v30 scanner, GM Tech 2, BMW OPS, BMW GT1 and BMW OPPS etc, the previous three diagnostic tools with strong functions, launch x431 master and autoboss v30 scanner is update online which make it more convenient for the customers, the later BMW OPS, BMW GT1 and BMW OPPS, they are all most professional diagnostic tools for the BMW cars, but they are a bit different, the BMW gt1 is good for the BMW cars before 2005, the other two tools are good for the BMW cars after 2005, so before you make a decision, you have to compare with all of them, then you will finally make a decision to buy which one.