Answer:
It will be counted as investment in 2016 and negative investment in 2017.
Explanation:
National income refers to the total value of a country's final output of all new goods and services produced in one year. There are various ways of measuring national income, e.g. GDP, GNP, etc
Therefore, following national income accounting practices, the car would be counted as part of the investments and GDP of 2016, and negative investment in 2017, because that was the year in which it was produced.