An owner of a Hyundai Ioniq 5 N recently discovered that he couldn’t perform one of the most basic maintenance tasks on his electric car: changing the brake pads. The reason has nothing to do with how complex or not the task was mechanically, but rather with Hyundai’s proprietary software and the professional-level credentials necessary to access it.
The episode has reopened the debate on the repairability of electrified vehiclesin an era in which we increasingly need professionals specialized in software and electronics in workshops, and carrying out maintenance on our own is increasingly more complicated.
The underlying problem. Brake pads are wear components that any car needs replacing periodically, although in electric vehicles they last longer thanks to the regenerative braking. On most cars, this job can be done at home with more or less basic tools and moderate mechanical experience. However, the Ioniq 5 N incorporates an electronic parking brake that must be fully retracted by a computer to allow changing pads, and then recalibrated to adjust to the thickness of the new parts.
What it cost the owner. According to shared user SoultronicPear on Reddit, no conventional diagnostic scanner worked on his 2025 Ioniq 5 N. After trying several options, he purchased a subscription to Hyundai’s J2534 software (costing $60 per week) and an approved adapter (about $2,000).
Still, the system didn’t work. After contacting the software developers, he discovered that the Windows version was not updated for the 2025 models, while official dealers use a completely different program based on Android.
a barrier. When I finally received the updated version of the software, a new obstacle appeared: the system requested credentials NASTF (National Automotive Service Task Force), a US organization that validates professional mechanics and regulates access to sensitive vehicle functions in the country.
According to TheDriveHyundai’s technical documentation states in red that “access to two-way tests and special functions requires NASTF Diagnostic Professional or Vehicle Safety Professional credentials.” Therefore, the owner could not access this adjustment firsthand.
Hyundai’s position. The middle consulted to the firm, which defended its procedure arguing reasons of security and functionality. “The official repair procedure requires placing the rear calipers into service mode using our Global Diagnostic System or the J2534 app. This ensures proper functionality and customer safety,” a spokesperson explained.
The company he added that it is exploring ways to make routine maintenance easier by “balancing convenience with security,” and that its official tool is available for anyone to purchase, although it is worth mentioning that its price is around $6,000.
Beyond legality. Technically, Hyundai does not violate the laws of law to repair because it offers access through systems compatible with the J2534 standard, not only through proprietary equipment. However, what has always been a task accessible to individuals with moderate mechanical knowledge who wanted to do it on their own, has been relegated exclusively to professional workshops, at least in this case.
A growing problem. Although the case focuses on Hyundai, the Korean brand is not the only one that makes repairs on modern vehicles difficult. The electrification and digitalization of automobiles is creating new barriers for owners and even independent workshops, who also cannot access these functions. For many enthusiasts, this takes away autonomy over their own vehicles and creates confusion, especially for something that should be as accessible as routine car maintenance.
Cover image | Tekton
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