Yes, windshield calibration is crucial for the proper functioning of ADAS. ADAS relies on various sensors and cameras mounted on the windshield to provide essential data for features like lane departure warning, adaptive cruise control, automatic emergency braking, and more. When a windshield is replaced or even repaired, the alignment of these sensors and cameras can be disrupted. Calibration ensures that they are correctly positioned and calibrated to ensure accurate readings and optimal performance of the ADAS features.