On-board computer - a thing for cars is not mandatory, but very useful. This modern device can not only notify any problems in the work of the car, but also to optimize or calculate some parameters in it. And make many other functions, depending on the model and the manufacturer. Therefore, it is better to approach the choice of an on-board computer, so as not to overpay for unnecessary functions or vice versa - not to be disappointed in its small functionality. For what, choosing a module, consider several main points.
Functional. Since some modern onboard computers are equipped with several dozen functions, immediately decide which ones are really important to you. In this case, do not focus on the fact that some indicators on the module duplicate the sensors already installed in your auto. Yes, indeed, the module collects information from all operating sensors, but it makes amendments and gives more accurate indicators.
Since the modern range of onboard computers for cars is very wide, focus primarily on your capabilities and the functions you really need. And do not forget about the strength of the information: look for and analyze it (reviews, opinions, recommendations, parameters).