i suggest under Forum SD should have CAR section.
under car section Types of cars( NIssan tread, toyota tread )

There are a lot of people which have cars and need advice in repairing and finding parts for them.

But aren't there also a lot of forums already out there that specialize in car repair/advice? Specifically for certain makes & models?

alternatively, you can click on the "auto" icon to filter out the other categories that does not apply to your needs.