The DGT imposes a anti-jerk system for new cars in Spain
Who has never been left with a dry mouth in front of a roadside breathalyzer test? Now imagine that, before starting the engine, your car forces you to blow and blocks the start if the alcohol level is above the allowed limit. A scenario that will become reality in Spain as of July 7, 2026.
The Directorate-General for Traffic (DGT), which has long scrutinized traffic accidents related to alcohol, has announced that all new registered cars will have to come pre-installed with a starter-blocking system with a breathalyzer, known as Alcolock.
The starter-blocking system: what it is and how it works
Mandatory pre-installation on all new cars
What is mandated is not the installation itself, but the pre-installation: new vehicles must come equipped with the connector and necessary infrastructure to have the Alcolock installed in case a judge or the DGT requires it. This will allow the measure to be applied quickly and easily without needing to tamper with the vehicle.
Actual operation and exceptions
The system works by measuring the alcohol in the air exhaled by the driver just before starting the car. If the level exceeds the allowed alcohol rate, the engine will not start. Not all drivers will be required to blow compulsorily: the measure is reserved for cases of recurrence or rehabilitation programs ordered by the courts.
Why does the DGT support this measure?
Alarming data on alcohol-related accidents
According to the DGT, in the European Union, 25% of deaths in traffic accidents are related to alcohol, but in Spain this figure rises to 34% of fatal victims with alcohol in their system in 2024. These figures, verified with the National Institute of Toxicology, highlight the need to act.
Limitations of current legal limits
The proposal to set the blood alcohol limit at 0.2 g/l for all drivers, which would have placed Spain among the first European countries to apply it, was rejected in Congress. The DGT argues that legal limits alone are not enough: they must be combined with visible sanctions and technologies that prevent driving under the influence of alcohol.
What changes starting July 7?
Mandatory for new cars registered in Spain
From July 7 onwards, no new vehicle may be registered without this pre-installation. The date coincides with the deadline set by the European Union to apply these new road safety measures.
Practical implementations and trials
The system will be key for repeat offenders who have been sentenced to rehabilitation programs with Alcolock. These drivers will have to take the test every day before starting the vehicle, a measure that can last months or years depending on the judicial decision.
| Feature | Detail |
|---|---|
| Effective date | July 7, 2026 |
| Affected vehicles | All new cars registered in Spain |
| Mandatory system | Pre-installation of Alcolock (starter-blocking system with breathalyzer) |
| Alcohol limit | Depends on current regulations, but the goal is to reduce accidents related to alcohol consumption |
| Application | In cases of recidivism and judicial rehabilitation programs |
The DGT has explained that this measure is a necessary step to face one of the most persistent problems in Spanish road safety. While it may seem like a technological nuisance, the reality is that it can save lives and reduce accidents caused by drivers under the influence of alcohol.
For regular drivers, this does not mean having to blow every time they start the vehicle, but it is a tool available to justice and authorities for specific cases. It is like wearing a seatbelt that only activates when really needed.
Who knows if in a few years we will see these systems as common as airbags or ABS, and breathalyzer tests will become an automatic process before starting the car.
