@crytek89 - The immobilizer ensures that nobody can drive away your car without the original key. The key cannot be just duplicated by a keymaker and used to drive your car. Therefore, if your Alto is equipped with an immobilizer, you normally don't need any further security to prevent your car from being stolen.
A central locking system has motors that lock all doors when the driver door is locked. A remote locking system lets you lock all doors with a small remote controller. If your car already has a central locking feature, then you save a little bit of cost in installing the remote lock as the remote lock only needs a motor to lock the driver's door and the other doors will be locked by the car's built-in central locking system.
I keep reminding myself that my car is just a means of commuting
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