Salary isn't everything in a car loan, I actually got approved by sending a copy of my college diploma/grades and law school acceptance letter since this was my first car in my name I just didn't have the credit history. I ended up not even needing proof of income and even have them lower my APR! When you don't have a history of car credit, it's hard to build a profile of a person.
I kind of wish I would have taken the higher rates two years ago when I got my Infiniti to avoid this kind of problem but my dad practically got 0% financing based on his income/credit so that was hard to pass up.
2015 F82 M4 - Yas Marina
2010 E92 M3 - Alpine White - Sold
2008 G37S Coupe - Sold