ADAS calibration in Cary, NC: the camera behind your windshield

What ADAS is and what the camera does

ADAS stands for advanced driver assistance systems. The Insurance Institute for Highway Safety describes front crash prevention as using sensors such as cameras, radar or lidar to detect a vehicle ahead: the systems warn the driver, prepare the brakes and, on most cars, brake automatically if the driver does not respond. Lane departure warning uses cameras to track where the car sits in its lane.

These systems work. The IIHS found that forward collision warning with automatic braking cut rear-end crashes in half, and that warning alone reduced them by 27 percent. Twenty automakers, covering 99 percent of US light vehicle sales, committed to make front crash prevention standard, and a 2024 federal rule requires it on nearly all new vehicles of 10,000 pounds or less by September 2029. More and more of the cars on I-40 and NC 540 every morning carry a camera behind the mirror.

I-CAR, the collision repair training body, lists what a forward-facing camera controls: lane departure warning, collision braking and adaptive cruise control. If the camera is aimed a little off, those systems are working from the wrong picture of the road.

When ADAS camera calibration is needed

I-CAR lists the events that may require the forward camera to be aimed again: removing the windshield, removing the rearview mirror, or removing the camera itself. For one example car in its calibration database, a 2019 Subaru Forester with a stereo camera, the calibration events include the windshield being removed or replaced and a wheel alignment being performed. I-CAR’s advice is to look up the manufacturer’s requirements for each vehicle, because they vary by year, make and model.

Impex’s guidance for drivers is that a car with features such as lane keeping assist, adaptive cruise control or automatic emergency braking likely needs calibration after a windshield replacement, accident repair or even suspension work. Incorrect calibration can cause false warnings or a failure to detect obstacles.

• A dark panel at the top of the windshield behind the mirror, with a lens in it, is the camera.
• Your owner’s manual lists the driver assistance features the car has.
• If a warning light about lane keeping or collision braking comes on after glass work, tell the technician straight away.

Static and dynamic calibration

There are two methods, and the car’s maker decides which one it needs.

Method	How it works	What it needs
Static	Targets are set at given positions in front of the parked car, and a scan tool starts the aiming routine	Level ground and space in front of the car, with the car not moving
Dynamic	The car is driven at or below a set speed for a set time or distance, sometimes with a scan tool connected	Roads clear of snow or rain, without heavy traffic or curves
Both	Some cameras need a static setup and then a drive	Both of the above

Those descriptions come from I-CAR. The practical point for a mobile job in Cary is that a static calibration needs the right space, and a dynamic one needs the right road and the right weather.

How Impex handles calibration

Impex says it performs ADAS calibration on site immediately after windshield replacement, and that its technicians complete both static and dynamic calibrations in one visit. It says most calibrations take between 30 minutes and 2 hours, depending on the make, the model and the type of system. Its About page describes VIN-based verification so the right part is ordered before scheduling, with on-site ADAS calibration when required.

For a Cary driver, that means the question to settle when you book is where. If your car’s calibration can be done where it is parked, it is done straight after the glass goes in. If it needs a level space that your driveway or lot cannot offer, or dry roads on a wet day, Impex will tell you and arrange the calibration accordingly. The mobile windshield replacement page covers how the visit is planned.

After calibration: what to watch for

Impex’s aftercare advice is to keep the car on a level surface and the tire pressures right, because changes in ride height or angle can affect sensor alignment. If you notice unexpected ADAS alerts or the systems behaving differently, contact the installer to have the calibration rechecked. Keep the camera area of the windshield clean so the lens has a clear view.

Is ADAS calibration covered by insurance?

Impex’s guidance is that, in most cases, calibration required after a glass replacement is typically covered by comprehensive insurance, and that many insurers cover it along with the glass. It is worth confirming with your insurer that both the glass and the calibration are included. In North Carolina, glass breakage is a comprehensive loss paid less any deductible, and you choose the repair service under G.S. 58-3-180. See insurance claims.

Radar is a separate job

Not every driver assistance sensor is on the windshield. Forward radar usually sits in or behind the front bumper or grille, and I-CAR notes it is normally calibrated after the radar is replaced, and may need it after bumper or grille removal or front structural repair. A windshield job does not usually mean radar calibration. That is covered on the ADAS radar calibration page.

Impex calibrates cameras for drivers across Cary and the towns around it: Apex, Morrisville and RTP, Holly Springs and Fuquay-Varina.

Questions people ask