Bottom line up front: if your vehicle has a camera mounted behind the windshield — and most built in roughly the last decade with lane-keeping, automatic emergency braking, or adaptive cruise do — then yes, that camera has to be recalibrated after the glass is replaced. Here's why it matters, and why your glass installer may not have done it.
What's actually behind your windshield
On most modern vehicles there's a forward-facing camera tucked behind the rearview mirror. It's the eye behind your driver-assist features — lane departure warning, lane-keep assist, automatic emergency braking, adaptive cruise, traffic sign recognition. It looks at the road through the glass and judges where your lane is and how far away the car ahead is. Your safety systems act on what that camera sees.
Why new glass throws it off
When the old windshield comes out and a new one goes in, two things change: the camera gets disturbed, and the new glass isn't optically identical to the old one — the mounting bracket, the glass thickness, and the way light passes through can all differ slightly. A fraction of a degree of aim is enough to matter. The camera is now pointed a little wrong and has no idea. ADAS recalibration re-aims it to the manufacturer's exact spec so it reads the road correctly again.
Static, dynamic, or both?
There are two ways to calibrate, in plain terms:
- Static — done in the shop, aiming the camera at manufacturer targets set at precise, measured distances on a level floor under controlled lighting.
- Dynamic — driving the vehicle at set speeds on well-marked roads so the system re-learns on the move.
Some vehicles need one, some need both — it depends on the make and model. Either way, this isn't a "clear the light and hope" job. It's a measured procedure with a pass or fail.
Why the glass shop may not have done it
Here's the part we end up explaining a lot: plenty of glass installers replace the glass and stop there. They either aren't equipped to calibrate, they sublet it out, or they hand the car back with the system uncalibrated and a note to "get it done." That leaves a safety system that looks fine on your dash but may misjudge your lane or brake late. If your paperwork doesn't say the ADAS camera was calibrated, assume it wasn't — and get it checked.
How to get it calibrated at Spot-On
By appointment, in our shop — which is the only place a static calibration can be done right, because it needs the level floor, the targets, and the controlled lighting. Call (210) 439-7905 or reach out through the site with your year/make/model, and tell us the windshield was replaced so we can prep the correct procedure.
We're at 4715 N Stahl Park, Suite 105, San Antonio, TX 78217.
Check your glass-replacement paperwork for the word "calibration." If it isn't there, assume the camera wasn't calibrated and call (210) 439-7905 — we'll verify it and recalibrate if needed.
If you're a glass shop or body shop
You don't have to buy the targets, the bay space, and the training to keep glass jobs moving out the door. Sublet the calibration to us and hand your customer back a vehicle that's actually right.