Application to check a used car engine

Just imagine a software that uses all the cumulative knowledge of the mankind to detect whether a used car engine should be replaced or is still in a working condition. What is now performed by an expert with decades of mechanic experience and is called a pure intuition, could be performed by an application that recognizes “bad” engine sounds. This will add to the security on the roads by solving the challenge of buying a used car.
Providing the software is applied to detect plane engines condition, it opens endless opportunities for the Aerospace industry.