ADAC warns of security flaws in keyless car entry systems

A ten-year study by the ADAC involving over 850 vehicles has revealed significant security vulnerabilities in keyless entry systems. The findings indicate that nearly half of the tested vehicles can be opened using a relay attack, where criminals use devices to artificially extend the radio signal between the key and the car. In approximately one-third of these cases, thieves were also able to start the engine.

While some manufacturers have transitioned to Ultra-Wideband (UWB) technology—which uses signal travel time to verify proximity and prevent signal extension—many brands still rely on older, insecure standards. The ADAC identified several manufacturers whose tested models lacked sufficient protection, including Aiways, Alfa Romeo, Alpine, BYD, Chevrolet, DS Automobiles, Fiat, Honda, Infiniti, Isuzu, Jeep, KGM/SsangYong, Lynk & Co, MG, and Opel.

Other brands, such as Dacia, Ford, Hyundai, Kia, Lexus, Mazda, Nissan, Peugeot, Polestar, Porsche, Renault, Seat, Toyota, and Volvo, showed improved security, with 20 percent or fewer of their tested models being vulnerable. The ADAC urges manufacturers to adopt modern security standards and advises consumers to inquire about UWB technology when purchasing new vehicles.