All Vehicles Sold in the EU Must Be Able to Hook Up to a Breathalyzer | WIREDSkip to main contentMenuSECURITYPOLITICSTHE BIG STORYBUSINESSSCIENCECULTUREREVIEWSMenuAccountAccountNewslettersBest Android TabletsBest Smart RingsDyson VacuumsSmart Home SecurityChoose the Right LaptopDeals DeliveredSecurityPoliticsThe Big StoryBusinessScienceCultureReviewsChevronMoreExpandThe Big InterviewMagazineEventsWIRED InsiderWIRED ConsultingNewslettersPodcastsVideoLivestreamsMerchSearchSearchFernanda GonzálezGearMay 23, 2026 3:00 AMAll Vehicles Sold in the EU Must Be Able to Hook Up to a BreathalyzerThe measure is part of a European Union–led strategy to eliminate all drunk-driving-related deaths and injuries by 2050.Photograph: François Nascimbeni/AFP/Getty ImagesCommentLoaderSave StorySave this storyCommentLoaderSave StorySave this storyAs of July 1, all vehicles sold within the European Union must include a standard, preinstalled interface that allows a breathalyzer lock to be added to the ignition system. This measure is part of a larger strategy promoted by the EU to reduce drunk-driving-related deaths and injuries by at least 50 percent by 2030.The requirement falls under the Vision Zero program, launched by European authorities more than five years ago, which aims to eliminate alcohol-related traffic fatalities entirely—or get as close to zero as possible—by 2050. The measure also aligns with the timetable established in the EU's General Safety Regulation, which sets specific deadlines for manufacturers to incorporate various safety features into vehicle designs, starting at the factory.The regulation that will become mandatory in July obliges automakers to provide an electrical connection and reserve a space inside the vehicle to allow the installation of an “alcolock” device. This device must comply with European standard EN 50436 for Alcohol Ignition Interlocks and have a certificate issued by an authorized accrediting entity.The operation of an alcolock is simple. Before starting the vehicle, the driver must blow into the device, which measures the level of alcohol present in the breath. If the result exceeds the legal limit, the system, which connected to the vehicle’s ignition or starting mechanism, automatically blocks the ignition cycle and prevents the car from starting.This type of technology already operates in several European countries, mainly as part of programs aimed at repeat offenders of alcohol-related offenses or in certain sectors of professional transport. Official figures estimate that its implementation can reduce fatal accidents associated with alcohol consumption by up to 65 percent.Since 2018, the European Union's road safety program has incorporated different technologies to reinforce safe driving. As of 2024, new vehicles integrate an intelligent speed assistant, a system that detects the permitted speed limit using cameras or GPS and alerts the driver when they are exceeded the limit.In addition, there is the emergency lane keeping assistant, capable of correcting the trajectory when the vehicle deviates without prior signaling. Also noteworthy is the event data recorder, popularly known as the “black box,” which stores key information during the seconds prior to an accident to facilitate law enforcement and traffic safety agency investigations.Recently, a requirement was added to incorporate the adaptive brake light, a mechanism that, in the event of sudden braking, automatically and intensely activates the rear lights to warn other drivers of the need to slow down and avoid a collision.The obligation to install an interface for an on-board breathalyzer is the final step in this set of safety measures. As of the first day of July, no car will be allowed to leave a dealership within the EU without full compliance with all these requirements.This story was originally published by WIRED en Español and has been translated from Spanish.CommentsBack to topTriangleYou Might Also LikeHow to find us: Add WIRED.com to your preferred sources in GoogleUsing AI for just 10 minutes could make you lazy and dumbBig Story: He couldn’t land a job interview—was AI to blame?Tesla says wheels may fall off CybertrucksLivestream: Submit your questions about how AI is transforming workFernanda González is a contributor to WIRED en Español. ... 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As of July 1st, all vehicles sold within the European Union are mandated to feature a standard, preinstalled interface enabling the addition of a breathalyzer lock to the ignition system. This directive is an integral component of a broader European Union strategy aimed at eradicating alcohol-related traffic fatalities and injuries by the year 2050, aligning with the Vision Zero program, which seeks to reduce these incidents to near zero. This regulatory measure is further synchronized with the timetables established in the EU's General Safety Regulation, which dictates that manufacturers must integrate various safety features into vehicle designs starting at the factory.

The core technological requirement is the provision of an electrical connection and a dedicated space within the vehicle to accommodate an "alcolock" device. This device must adhere to the European standard EN 50436 for Alcohol Ignition Interlocks and must possess a certificate issued by an authorized accrediting entity to ensure compliance. The operational mechanism of the alcolock is straightforward: prior to starting the vehicle, the driver must breathe into the device to measure alcohol levels in their breath. If the measured concentration surpasses the legal threshold, the system automatically interrupts the ignition or starting sequence, effectively preventing the vehicle from operating.

This technology is supported by existing operational experience in several European countries, primarily implemented for repeat offenders or within specific professional transport sectors. Official estimates suggest that deploying such systems has the potential to reduce fatal accidents attributable to alcohol consumption by as much as sixty-five percent. This requirement represents the culmination of a multi-faceted road safety program implemented by the EU since 2018, which has involved the integration of various advanced technologies to promote safer driving practices. These prior safety measures include intelligent speed assistants that use cameras or GPS to alert drivers when speed limits are exceeded, emergency lane keeping assistants that correct trajectory deviations without signaling, and event data recorders, commonly known as black boxes, which capture critical data immediately preceding an accident for law enforcement and safety agency investigations. Furthermore, a recent addition involved the adaptive brake light technology, which automatically and intensely activates rear lights upon sudden braking to warn other drivers. The implementation of the on-board breathalyzer interface represents the final step in this systematic approach to enhancing vehicular safety. Full compliance with these requirements is mandatory for any vehicle leaving a dealership within the EU as of the commencement date.