Door lock actuators are responsible for locking and unlocking a vehicle's doors. Over time, door lock actuators can fail due to normal wear and tear or due to exposure to the elements. When an door lock actuator fails, it can cause the door to become difficult or impossible to open. In some cases, the door may even become stuck in the locked position.
There are a few different reasons why door lock actuators may fail. One of the most common reasons is simply because they are exposed to too much moisture or humidity. This can cause corrosion on the internal components of the actuator, which can eventually lead to failure. Additionally, if an actuator is constantly being used (for example, if you have a habit of locking and unlocking your doors multiple times throughout the day), this can also contribute to wear and tear that could eventually lead to failure.
If your door lock actuator has failed, you will need to replace it in order to restore full function to your vehicle's doors. Fortunately, this is a relatively easy repair that can be completed by most do-it-yourselfers with basic mechanical skills.