Maryland Mass. Michigan Minnesota Miss. Missouri Montana Nebraska Nevada New Hamp. New York N. Carolina N. Dakota Ohio Oklahoma Oregon Penn. Apparently, she is. Anyone can sue anyone for anything.
Some states have protections for a purchaser of a used car.
Not certain if you mean the repairs weren't done for six months. That would likely work against her. If you've ever seen Judge Judy or The People's Court, you should know that people often sue even when they have no case at all. You may want to consult with an attorney to learn how to defend this case, and to see if she has any case at all. Ask an expert or become an expert .