automobile mechanic; auto mechanic; car mechanic
Refers to a person who repairs cars professionally. The term is straightforward and neutral.
He has ten years of experience as an auto mechanic.
Many people study at a vocational school to become a car mechanic.
Compound of 自動車 (automobile) + 修理 (repair) + 工 (worker, craftsman). The exact historical derivation is straightforward from its components.