A trigger map is a fast way to confirm what must be calibrated on a Volkswagen Multivan for OEM ADAS Calibration. Start with windshield-related events: if the forward camera mounts behind the glass, windshield replacement commonly requires calibration because camera seating, bracket alignment, and the camera-to-glass relationship define the optical axis. Any bracket replacement, re-bond, or movement is a direct trigger when the OEM specifies ADAS Calibration. Next, evaluate front-end work. Radar sensors and brackets in the grille or bumper area can be disturbed during collision repairs, bumper removal, grille replacement, or bracket service, and recalibration may be required even if no warning light is present. Add geometry triggers: wheel alignment changes, toe/camber adjustments, suspension repairs, ride-height changes, or tire-size changes can alter how the Volkswagen Multivan interprets lane position and relative motion. Include sensor movement as a trigger even when a sensor is not replaced; small shifts can skew distance or lane calculations while communication checks still pass. Finally, identify module-specific initialization triggers (steering-angle relearn, yaw-rate reset, battery disconnect effects) that may require a relearn routine instead of full calibration, depending on OEM rules. Document the map as repair event → mount disturbed → module affected → required method so you don’t calibrate one system while missing another.