What is calibration drift in ADAS, and how is it detected?

• A. A drift in wheel alignment causing steering issues.
• B. No such thing exists.
• C. A misalignment of ADAS sensors or cameras causing incorrect readings.
• D. A dashboard gauge misreadings due to battery.

Answer: (C)

Calibration drift happens when the ADAS sensors or cameras lose their precise mounting alignment, so the system’s perception of the car’s position and its surroundings becomes off. That shift can come from windshield work, a bump or vibration, or other changes to the sensor housing. When the sensors aren’t pointing exactly where they should, the readings they rely on—like lane markings, pedestrians, or following distance—become inaccurate, causing features to behave oddly or trigger false warnings.

You detect calibration drift through several checks. Diagnostic tools can show fault or miscalibration codes for the ADAS sensors. Visual inspection can reveal a loose or misaligned camera or sensor housing. A formal calibration procedure is then performed using OEM-recommended targets and steps to verify that each sensor is within tolerance. After calibration, a dynamic road test or verification drive is done to confirm that ADAS features respond correctly and safely. This is why calibration drift is distinct from wheel alignment or dashboard gauge readings—the issue is with sensor alignment and perception accuracy, not with the vehicle’s tires or electrical gauges.