General:
* Mechanic: This is the most common term for someone who repairs cars.
* Auto technician: This term is becoming more popular and emphasizes the technical skills involved in modern car repair.
* Auto repair person: This is a more general term that can be used for anyone who repairs cars.
More specific:
* Body shop technician: This term refers to someone who repairs the body of a car, such as after an accident.
* Engine mechanic: This term refers to someone who specializes in repairing car engines.
* Transmission mechanic: This term refers to someone who specializes in repairing car transmissions.
You could also use more informal terms like car guy/gal, fix-it person, or handyman/woman if they work on cars as a side job.
Ultimately, the best term to use depends on the context and the specific type of work they do.