I am an auto mechanic, I specialize in repairing and fixing cars, My main role is to diagnose the actual problem accurately and quickly.
yeah it was good job. i have a little interest in that field
Oh well my Their job usually involves the repair of a specific part or the replacement of one or more car parts usually. 
yeah how was your day?
My day was great, Its so busy and all with fixing cars which is rewarding because it also pays well. 
are you interesting doing work on cars 
I sure am, I often have to quote prices for my customers before doing any work or after partial disassembly for inspection.
oh its impressive
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