Do you know how to work on cars?
No but I have a close friend who does
Have they ever helped you with your car if it's been broken?
Yes they have they are called auto mechanic (automotive technician in most of North America, car mechanic in British English, and motor mechanic in Australian 
That's good to know, thank you. I should learn how to work on my car more but all I can do is change the oil.
Wow, their main role is to diagnose the problem accurately and quickly.
UTI is a technical college for auto mechanics in Florida, I've known a few mechanics that have attended that school.
of one or more parts as assemblies.
Basic vehicle maintenance is a fundamental part of a mechanic's work in modern industrialized countries while in others they are only consulted when a vehicle is already showing signs of malfunction. Preventative maintenance is also a fundamental part of a mechanic's job, but this is not possible in the case of vehicles that are not regularly maintained by a mechanic. One misunderstood aspect of preventative maintenance is "scheduled replacement" of various parts, which occurs before failure to avoid far more expensive damage.
Auto mechanic
An auto mechanic (automotive technician in most of North America, light vehicle technician in British English, and motor mechanic in Australian English) is a mechanic with a variety of automobile makes or either in a specific area or in a specific make of automobile. In repairing cars, their main role is to diagnose the problem accurately and quickly. They often have to quote prices for their customers before commencing work or after partial disassembly for inspection. Their job may involve the repair of a specific part or the replacement