Probably not the advice you asked for, but you should also consider that commuting 170 miles a day is a big mistake, either in your choice of living arrangements or employment. Any car will eventually break down with that much daily use.

The 18% interest rate is also way too much to pay on any loan. I don't believe Hyundais have a great reputation for reliability.

Check if there's public transit options for your new job and look for apartments closer. If not, try to find a used car (1-2 years old) from a more reliable brand.