The unique nature of the WishList feature offers clear advantages in ensuring more opportunities to see vehicles as they come into your store for your customers.
The more common trend as of late, at least in terms of what I am seeing, is less model-specific and more generalized in that discovery phase.
Being able to get Granular with all three required fields is excellent; however, I propose giving some flexibility for individuals who have a brand preference but are more "cost-conscious" and not so much driven by the "model" to allow a catch-all mechanism so we can present more options that are brand-related that fit that price point.
Food for thought