Interior trim includes: instrument panel, auxiliary instrument panel, door panel, door opening handle, interior trim panel of each column, carpet, roof lining, sun visor, etc. seats, steering wheel, airbag, seats, safety belts, etc. are classified as restraint components, but generally speaking, they also belong to interior trim. Sometimes the engine hood is also divided into interior decoration and exterior decoration.
Exterior decoration mainly refers to front and rear bumpers, rear license plate lamp cover, etc.
Most of the interior and exterior trim parts are non-metallic.