In general, the more recent your vehicle, the more diagnoses you can do on it. The second piece of useful information is the 'level' of implementation of the standard. The list can be used (if your vehicle is on it), to know in advance if you can buy an ELM interface and whether it will work with your vehicle. While the official dates for implementing the standard have been defined, manufacturers have implemented the standard more or less early. Compatible vehicles can be diagnosed using generic (multibrand) ELM327 interfaces. Interpreting table dataThe tables on this page represent lists of vehicles that are compatible with the OBD standard (EOBD or OBD2 depending on the country).