Calibration is required when a windshield is replaced, a bumper is repaired or replaced after a collision, suspension or wheel alignment is performed, or sensor/radar units are replaced. 

​

Improper Calibration can lead to false warnings, failure to brake in an emergency, and increased accident risk due to the compromise of vehicle systems. ADAS systems directly affect vehicle safety; proper calibration ensures the car performs as designed by the manufacturer. 

​

In the UK, ADAS calibration is legally required to ensure vehicle safety, with specific guidance for both private and commercial vehicles, and must be performed according to manufacturer specifications by certified technicians.