Concept:
Present continuous tense in passive voice follows the structure:
\textit{is/am/are + being + past participle}.
Explanation:
The active sentence is in present continuous (“is driving”).
In passive voice, the object “a car” becomes the subject.
The verb changes to “is being driven,” and “he” becomes “by him.”
Thus, the correct passive form is: A car is not being driven by him.