Automotive spare parts are composed of four main parts: engine, chassis, body, and electrical equipment. These four parts are assembled by the assembly of various components, the division of various components, and the combination of individual components.

The assembly, division, and individual components that make up a car, as well as the assembly, division, and individual components that are naturally consumed and need to be supplemented or replaced to maintain the good condition of the car during use, are collectively referred to as car spare parts.

Automotive spare parts refer to parts that generally need to be replaced. The spare parts department is responsible for stocking up on spare parts, which are frequently replaced by car owners. For example, air conditioning grids (scientific name: air filter), oil grids (scientific name: oil filter), air conditioning grids (scientific name: air conditioning filter), gasoline grids (scientific name: gasoline filter), spark plugs, and engine oil. These are automotive spare parts.

Auto parts refer to parts that are not frequently replaced, and the spare parts department does not need to stock them. If stocked, it may result in C, D, and inventory. However, these parts can be ordered through regular orders from manufacturers, and most car owners rarely replace them, such as exhaust pipes, oil pans, headlights, glass, engine covers, etc.

The spare parts department is generally managed by the after-sales department of a special sales service store jointly established by the automobile manufacturer and the automobile sales company. It is also called the parts department, parts department, and components department. Sometimes it is also set up as an independent department according to the requirements of the automobile manufacturer.

The spare parts department is generally composed of a parts manager, a spare parts supervisor, a spare parts planner, a warehouse keeper, and an accountant. The parts manager is responsible for external affairs, communication and coordination with parts suppliers, procurement of new parts, etc. The spare parts supervisor is responsible for the department's personnel, team management, spare parts ordering approval, the spare parts planner is responsible for spare parts ordering, spare parts inventory management, and handling of C and D class inventory. The warehouse keeper is responsible for the arrival, shipment, receipt, shelving of parts, as well as the hygiene and placement of goods in the spare parts warehouse. The accountant is responsible for entering the cost of spare parts into the system, including tax cost prices, and sales prices.