Immobilizer

The development of immobilizers has evolved considerably over the years to meet increasing demands for security and ease of use. Modern systems not only offer protection against theft, but also additional functions that make driving more comfortable.

How the immobilizer works

Modern vehicles usually have a transponder in the key that sends a signal to the vehicle's control unit. If the control unit recognizes the signal as valid, the immobilizer is deactivated and the engine can be started. If the signal is not recognized, the engine remains blocked.

Why and when is deactivation of the immobilizer useful

Deactivating the immobilizer may be necessary in certain situations, for example when repairing or replacing control units. In these cases, it may be necessary to temporarily deactivate the immobilizer in order to start the vehicle.

Disabling the immobilizer can also affect insurance coverage. In the event of theft, the insurance company could refuse to pay if it is determined that the immobilizer was intentionally disabled.

History of immobilizer systems

1st generation: Mechanical immobilizers
These early systems rely on mechanical components that prevent the vehicle from starting. These include, for example, steering wheel or transmission locks that physically prevent the vehicle from moving or starting.

2nd generation: Electronic immobilizers
In the 1980s, electronic immobilizers were introduced. These systems use electronic keys or transponders that communicate with the vehicle. If the correct key is not recognized, the engine will not start.

3rd generation: transponder immobilizers
These systems use a transponder in the key that sends a unique signal to the vehicle. Only when the signal is recognized can the vehicle be started. This technology offers greater protection against theft.

4th generation: immobilizers with radio remote control
This generation combines transponder technology with a radio remote control. The key sends a signal that unlocks the vehicle and simultaneously deactivates the immobilizer. This increases convenience and safety.

5th generation: Integrated immobilizers
Modern vehicles often use integrated systems that incorporate immobilizers into other vehicle functions, such as the central locking or alarm system. These systems are often harder to defeat and offer additional security features.

6th generation: smartphone-based immobilizers
The latest developments make it possible to control the vehicle via a smartphone. The immobilizer can be activated or deactivated via an app, which offers a high level of flexibility and user-friendliness.