Buy car price not more than your annual salary just a simple reference so you don't overcommit to the car.
If your annual salary is low but you have tons of saving that can cash out the car u bought although it is already over your annual salary, you can still buy it.
The key is how much u can afford a car without it taking a big chunk out of your income/savings.
If there is people with 3k salary went for 100k car, by all means if they do not have any commitment or future plan, doable but not a wise thing to do in life. But hey if you have a dream to own 100k car and willing to sacrifice your entire saving for it and face the consequences, why not?