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5 Parts of a Car Door and Their Functions, Let's Understand!

10 April 2025
bagian pintu mobil dan fungsinya

One of the important components of a car body is the door. Not only is it used as a place for passengers to enter and exit, but the car door also serves as the location where the electrical system and car door speakers are connected. So, what are the parts of a car door and their functions? 

As a car owner, it’s a good idea to familiarize yourself with the various parts of this four-wheeled vehicle door. By knowing its parts, you can maintain it optimally. 

Parts of a Car Door and Their Functions

Here are several parts of a car door along with their functions:

1. Inner and Outer Panels

There are various types and shapes of car doors. However, each door consists of 2 panels, namely the inner panel and the outer panel. These two panels are joined using a pressing method, creating a very strong construction. 

The panel is the source of the strength of the car door, and this strength is generated from the curves of the inner panel. The function of the inner panel is to store the car's electrical network cables. Meanwhile, the outer panel serves as a protector or cover and protects all components of the door. 

Read Also: 4 Ways to Open a Car Door Locked from the Inside

2. Window Channel

Another part of the car door and its function is the window channel. Don’t be mistaken, the door is not only used to store audio and electrical network cables but also serves as a window holder. In fact, the door not only holds the glass but also houses all components of the power window

The window glass is generally installed in the door channel, and all components such as the window motor and battery are located between the gaps of the inner and outer panels of the door. 

3. Hinge Mount

Another part is the hinge mount. The hinge mount is also an important component because without it, the door cannot be connected to the entire body of the vehicle. Issues with the hinge mount can also cause serious damage. 

In fact, if the door hinges are no longer symmetrical, the door cannot close properly. To fix this damage, the door must be welded. This process is certainly very complicated because there are various components that need to be removed first. 

4. Rubber Channel

Have you ever experienced a car door being difficult to close or open? There’s a good chance that this is caused by the door becoming brittle from prolonged use. The car door also has protective rubber located in the door's rubber channel. 

The function of this rubber is to dampen the friction that occurs between the door and the car body when the driver closes and opens the car. To ensure the car door rubber lasts, avoid slamming the car door too hard; you can gently push the door.

5. Door Lock

The last part is the lock. The lock serves as a protector for the door from damage, scratches, or misalignment of the car door. The lock is located on the door edge and is generally made from aluminum and elastic rubber materials. 

To prevent the lock from getting damaged quickly, avoid parking in hot places or direct sunlight. Sunlight can cause the rubber material to deteriorate or expand quickly. Additionally, this part should also be regularly cleaned.

In addition to knowing the parts of the car door and their functions, make sure to also take good care of all car components. For maintenance, you can take your beloved car to an official Daihatsu workshop. 

At the official Daihatsu workshop, you will find original spare parts, and all services are performed by experienced mechanics. Not only that, but you also won’t need to queue after booking a service. 

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