A wave of right-to-repair laws moving through state legislatures is quietly becoming one of the most consequential developments for car enthusiasts in years — and most of the conversation around it has focused on dealerships, not garages.
At the center of the issue: modern vehicles increasingly rely on proprietary diagnostic software and locked-down ECUs, making it harder for independent shops and DIY enthusiasts to diagnose, repair, or modify their own cars without manufacturer-approved tools. Several states have passed laws requiring manufacturers to make repair information and tools available to independent shops and owners on reasonable terms — and the ripple effects extend to performance tuning. The Repair Association tracks this legislation state by state.
For the tuning and modification community specifically, this could mean easier legal access to factory service information, OBD-II data streams, and diagnostic protocols that have become harder to access as cars have grown more software-dependent. Several aftermarket tuning companies have been vocal supporters of these laws, arguing that locked ECUs threaten an entire industry built around performance modification.
Manufacturers have pushed back, citing safety and emissions concerns — arguments that carry real weight, particularly around modifications that could affect emissions compliance or safety systems. The legislative fights are ongoing, and outcomes vary significantly by state.
Worth watching: If you do your own wrenching or work with an independent tuner, the regulatory environment around vehicle software access is shifting in ways that could directly affect what’s possible on your build in the next few years. It’s part of a broader pattern of accountability and access shaping the industry — see how Hyundai’s anti-theft software update raises similar questions about who controls a car’s systems.
Recommended Gear
If right-to-repair is bringing you back to wrenching on your own car, the diagnostic side is where to start:
- Bidirectional OBD2 scanner — reads codes and actuates components for real diagnostics, the same access independent shops rely on
- Bluetooth OBD2 adapter — the budget option; paired with a phone app, it covers code reading and live data for under $30
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