What Is ADAS?
Advanced Driver Assistance Systems (ADAS) are the suite of safety technologies in modern vehicles that help you drive more safely. These systems rely on cameras, sensors, and radar — many of which are mounted on or near the windshield.
Common ADAS features include:
- Lane departure warning/lane keep assist
- Automatic emergency braking
- Adaptive cruise control
- Forward collision warning
- Automatic high-beam headlights
- Rain-sensing wipers
- Head-up display (HUD)
Why Calibration Is Required After Windshield Replacement
The forward-facing camera mounted behind your windshield "sees" the road through the glass. When the windshield is replaced, even microscopic differences in glass thickness, angle, or camera mounting position can throw off the camera's calibration. A camera that's off by even 1 degree can miss a lane marking or misjudge the distance to the car ahead.
Skipping calibration is not an option. Driving with an uncalibrated ADAS system is dangerous — your safety systems may not respond correctly in an emergency, or worse, they could activate inappropriately (phantom braking, steering corrections at the wrong time).
Two Types of Calibration
Static Calibration
Performed in a controlled indoor environment using specialized targets and equipment. The vehicle is positioned precisely in front of calibration targets, and diagnostic software adjusts the camera settings. This method:
- Takes 30-60 minutes
- Requires a flat, level surface and controlled lighting
- Costs $150-$350
- Most common method for forward-facing cameras
Dynamic Calibration
Performed by driving the vehicle at specific speeds on clearly marked roads. Diagnostic equipment connected to the vehicle monitors the camera as it recalibrates itself using road markings and surroundings. This method:
- Requires a 20-30 minute drive at 30-60 mph
- Needs clear lane markings and good weather
- Costs $100-$250
- Some vehicles require both static AND dynamic calibration
Does Your Vehicle Need Calibration?
If your vehicle was manufactured after 2015, there's a strong chance it has at least one ADAS feature. Check your owner's manual or look for a camera housing near the rearview mirror on the inside of your windshield. When in doubt, ask your glass installer — a professional will know whether your specific make and model requires calibration.
Cost of ADAS Calibration
Calibration adds $150-$500 to your windshield replacement bill, depending on the vehicle and calibration type required. Luxury and European vehicles tend to be on the higher end due to more complex systems and manufacturer-specific requirements.
The good news: if you're filing an insurance claim for windshield replacement, ADAS calibration is typically included in the covered cost. See our insurance coverage guide for details.
Red Flags: When to Be Concerned
If you notice any of these after a windshield replacement, calibration may not have been performed (or was done incorrectly):
- ADAS warning lights on the dashboard
- Lane departure system acting erratically
- Adaptive cruise control braking unexpectedly
- Forward collision warnings triggering for no reason
- Automatic high beams not switching properly
Contact your installer immediately if you experience any of these issues. For full replacement pricing including calibration, check our windshield replacement cost guide.
