China lifts sensor size restrictions, giving smart-vehicle hardware more design freedom

China has introduced new regulations that remove size restrictions on key smart-vehicle sensors, giving automakers greater flexibility in how they integrate autonomous-driving and vehicle-to-everything (V2X) hardware onto vehicle bodies.

Under the new rules, components including millimeter-wave radar, cameras and V2X antennas are exempt from previous dimensional constraints that had limited where and how these devices could be mounted on a vehicle.

The changes are significant for Chinese automakers racing to equip vehicles with advanced driver-assistance systems (ADAS) and smart-cockpit features. Previously, strict size and placement regulations restricted sensor integration, often forcing engineers to compromise between aerodynamic design and hardware visibility.

Millimeter-wave radar, a core component of most ADAS suites, will now benefit most directly from the relaxation. Camera placements — critical for visual recognition and navigation-on-autopilot features — also gain new latitude in positioning.

The rules mark a step toward aligning China's vehicle-certification standards with evolving autonomous-driving technology, particularly as Chinese brands race to deploy city-level navigation-on-autopilot (City NOA) across their lineups.

No effective date or implementation timeline was provided in the source material.