If you search on the Internet for advice on lemon laws, you will find many websites with information. Many of these are either written by law firms or are sponsored by law firms and so the information may not be unbiased as you would like.
Lemon law lawyers want to get your business because they are willing to take cases on a contingency basis. That means they don't charge you upfront but take a percentage of the settlement if you/they win. There are many lemon law attorneys who can help you, and if they are successful and win they usually take a reasonable percentage of the settlement amount. Most often this will still leave you wilth enough dollars to replace your car that was a lemon.
Most lemon law lawyers will give you a free consultation and let you know what your rights are and what your settlement might be if you win. It is wise to do some research on your own before you meet with a lemon law attorney though, so that you can better asses what he is saying.