The fact that you filed bankruptcy does not mean that your life is over from a financial or economic standpoint. Even though the bankruptcy was unfortunate, you are going to be taking steps to pull things back together. Hopefully you learned something as a result of your bankruptcy process and will not allow the same mistakes to happen again.
Most lenders will understand that sometimes there are valid reasons for being required to file bankruptcy, and you can still get a car loan after bankruptcy. The first thing you should do is file a consumer statement with each of the credit bureaus. On your credit report, the consumer is allowed to add a statement of limited length to describe a circumstance or shed additional light on the report. If your bankruptcy was caused by things that were totally outside of your control, then you should add that consumer statement to your credit report with each of the major credit reporting agencies, which are Experian, Equifax, and TransUnion. This consumer statement will outline, briefly, the reason for your need to file bankruptcy, such as a serious illness, the death of a family member, unexpected medical expenses, a business partner running off with capital assets, or whatever the reason was.
Now in order to get a car loan after bankruptcy, what will happen during the application process is that, of course, your credit report will be pulled. Perhaps the major lenders will be androids about the process and not read the consumer statement, but if not, most of the secondary lenders will read the consumer statement, and then make a judgement call as far as your application. They will most likely not offer the prime or best interest rates, but at least there is a good chance that you will get approved.
Depending on how long it has been since you filed bankruptcy, a superb credit history since your filing will also go a very long ways towards helping your case and showing that you are sincere about turning your financial life around,and every little bit helps. In fact, if you are doing well financially since your bankruptcy, you may even have multiple options for financing, and it could be easy to get a car loan after bankruptcy.