If your car has a camera mounted behind the windshield, replacing the glass is only half the job. The camera has to be recalibrated so lane-keeping, automatic braking and other driver-assist features see the road correctly again. Here’s what ADAS calibration is, why ADAS calibration matters after a new windshield, when you need it and what to ask before you book.
What ADAS is
ADAS stands for Advanced Driver Assistance Systems: the features that help you stay in your lane, keep distance, brake for hazards and read road signs. Many of them rely on a forward-facing camera mounted at the top of the windshield, and some also use radar or sensors in the bumper and grille.
- Lane departure warning and lane-keeping assist
- Automatic emergency braking and forward collision warning
- Adaptive cruise control
- Traffic sign recognition and automatic high beams
Why a new windshield affects the camera
The camera looks through a small, specific area of the glass. When the windshield is replaced, the camera bracket comes off and goes back on, and the new glass can sit a fraction of a degree differently. At highway distances, a tiny angle error becomes a big miss: the system may think your lane is somewhere it isn’t, or react late. Calibration re-aims the camera to the vehicle maker’s specs. For background, see NHTSA’s guide to driver assistance technologies.
Static vs dynamic ADAS calibration
- Static: done with the vehicle parked, using targets set at exact distances and heights in front of the car.
- Dynamic: done by driving the vehicle at set speeds on well-marked roads while a scan tool guides the camera through its learning process.
- Both: some vehicles require a static and a dynamic step. The vehicle maker decides which, not the shop.
When you need ADAS calibration
- After windshield replacement on any vehicle with a windshield-mounted camera
- After a wheel alignment, suspension work or a collision repair that changes ride height
- When a driver-assist warning light comes on, or lane-keeping or braking behaves strangely
A simple chip repair usually does not require calibration, since the glass and camera never move. Not sure if your damage can be repaired? See windshield repair or replacement: how to tell.
Does insurance cover it?
When a windshield replacement is covered under comprehensive, the required calibration is normally treated as part of the same job. Details vary by policy, so check yours, and read how insurance covers windshield replacement.
What to ask before you book
- Is calibration included in the quote? A cheaper price that leaves it out is not a deal.
- Static, dynamic or both? The answer should come from your vehicle maker’s procedure.
- Do I get a calibration report? A printout or record showing it was completed is worth keeping.
- Is the glass right for my camera? Camera brackets and optical clarity matter. More on that in OEM vs aftermarket windshields.
Learn more about our ADAS calibration service.
Get a real quote for your vehicle
Send us your year, make, model and VIN and tell us which glass has damage. We’ll check your insurance and the parts available, and give you the real number. Mobile service across Orange County, 8am–5pm, 7 days a week.
