ADAS Functionality and Integrity Act

H.R. 6688 would direct the National Highway Traffic Safety Administration (NHTSA) to establish guidelines for advanced driver assistance systems (ADAS) calibration and safety when vehicles are modified or repaired. The bill would require NHTSA to define modification ranges and tolerances for vehicles beginning with model year 2028, specifying how much a vehicle can change in ride height, sensor position, wheel and tire dimensions, and overall geometry before ADAS systems fall out of specification. The bill would also require NHTSA to establish test procedures that repair shops and aftermarket businesses can use to validate that ADAS systems function properly after modifications or repairs.

The legislation addresses a growing concern as newer vehicles increasingly rely on advanced safety features like automatic emergency braking and lane-keeping assistance. Starting in model year 2029, federal regulations will require automatic emergency braking on all new passenger cars and light trucks. Currently, collision repair shops and aftermarket businesses lack clear federal guidance on ADAS calibration standards when vehicles are modified with items like lift kits, larger wheels, aftermarket bumpers, or bike racks. The bill would provide this guidance without imposing mandatory regulatory requirements on repair shops or aftermarket businesses. The bill is currently under committee consideration and has not yet been voted on by the full House.