In ADAS recalibration, mounting brackets or reflectors are considered because they influence alignment. Which statement best explains their role?

• A. They have no impact on sensor alignment.
• B. They are used only for mounting without affecting calibration.
• C. They can be replaced without recalibration.
• D. They influence alignment of sensors.

Answer: (D)

In ADAS recalibration, the fixed mounting geometry provided by brackets and reference reflectors sets the exact position and orientation of every sensor relative to the vehicle. Cameras, radar, and lidar rely on this reference frame to interpret the world correctly. If a bracket is damaged, replaced, or a reflector shifts, that reference frame changes, which can throw off how the sensors align with the vehicle and with real-world targets. Because calibration aims to align sensor readings to the actual vehicle geometry, these mounting components directly influence the required recalibration.

So the statement that mounting brackets or reflectors influence sensor alignment is the correct one. The others imply no impact or bypass recalibration, which isn’t accurate since any change to the mounting references typically necessitates recalibration to restore accurate sensor alignment.