* Window Regulator: The mechanism that raises and lowers the window.
* Window Motor: The electric motor powering the window regulator.
* Window Tracks: The channels guiding the window up and down.
* Door Lock Mechanism: Includes the lock actuator (often electric), latch, and striker.
* Door Handle Mechanism: Internal linkage connecting the exterior handle to the locking mechanism.
* Interior Door Handle: The handle used to open the door from inside.
* Armrest: Provides support and often houses storage compartments.
* Door Panel: The inner door skin, often containing speakers, switches, and other components.
* Speaker(s): For the audio system.
* Wiring Harness: A bundle of wires connecting various components within the door and to the car's electrical system.
* Door Switch Panel: Contains switches for windows, mirrors, and sometimes door locks.
* Water Drainage Channels: Prevent water from accumulating in the door.
* Safety Restraint Components (some models): Parts related to seatbelts or airbags.
* Child Safety Lock Mechanism (some models): Prevents the door from opening from the inside.
This list isn't exhaustive, as different car models and trim levels will have variations in components and their complexity.