What is the difference between a vehicle's built-in GPS and a car GPS tracker?

The vehicle's built-in GPS is equipped by the original Car factory. It has navigation functions and can also locate the vehicle after it was stolen. With a vehicle's built-in GPS, why would anyone take the trouble to re-install a car GPS tracker? What's the difference between a vehicle's built-in GPS and an on-board GPS tracker?

1- positioning accuracy

The GPS built in the original factory is usually only used for positioning after the theft of the vehicle, and its positioning accuracy is not very good, so although it can usually only be used to roughly locate the vehicle.

The vehicle GPS locator is sold exclusively by the manufacturer. As a type of auto parts, its positioning accuracy is much higher than the original GPS of the vehicle.

2 - Ownership

The built-in GPS ownership right of the vehicle originates from the car manufacturer, and the owner cannot usually find the positioning information about the vehicle on his own. The owner can only bring the relevant documents after the theft of the car and accompany them to contact the police to locate the vehicle.

After the GPS locator is installed, there is no doubt that the owner owns it. It is not necessary to be cumbersome to check it on weekdays, and various anti-theft functions can be modified to prevent theft of the vehicle.