car part vs component

car part and component both are nouns.

Word	Noun	Adjective	Verb	Adverb
car part	Yes	No	No	No
component	Yes	No	No	No

As nouns, component is a hypernym of car part; that is, component is a word with a broader meaning than car part:

car part: a component of an automobile
component: an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system

Other hypernyms of car part include constituent, element.

car part (noun)	component (noun)
a component of an automobile	an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system
	an abstract part of something
	something determined in relation to something that includes it