ADAS Calibration in Winston-Salem, NC After a New Windshield

Winston-Salem Auto Glass is Impex Auto Glass serving Winston-Salem. Impex says it performs ADAS calibration on site immediately after windshield replacement, so the glass and the calibration are one job and one visit, without a separate dealership appointment. This page explains what is being calibrated, the two ways it is done, how long it takes and what to check afterwards.

What the camera does

IIHS, the Insurance Institute for Highway Safety, describes front crash prevention as using cameras, radar or lidar to detect a vehicle ahead. The system warns the driver, and most brake automatically if the driver does not respond. Lane departure warning uses cameras to track where the vehicle sits in its lane. IIHS found that forward collision warning combined with automatic braking cut rear-end crashes in half, and warning alone reduced them by 27 percent.

Those systems are becoming universal. IIHS reports that 20 automakers, covering 99 percent of US light vehicle sales, committed to standard front crash prevention, and that a 2024 federal rule requires it on nearly all new vehicles of 10,000 pounds or less by September 2029. More cars on Winston-Salem roads every year carry a camera behind the mirror.

Why new glass means a new aim

I-CAR, the collision repair training organisation, says forward facing cameras control lane departure warning, collision braking and adaptive cruise control, and lists ‘removing the windshield’ among the events that may require the camera to be aimed. A camera reads the road through the glass at a fixed angle. A new windshield, even the right part fitted well, can shift that angle by a fraction, and a fraction at the camera becomes a large error a hundred yards down the lane.

Requirements are set by the automaker and vary by year, make and model. I-CAR keeps a search tool for exactly that reason. In its example of a 2019 Subaru Forester with the EyeSight stereo camera, the listed calibration events include ‘If windshield is removed or replaced’ and ‘If wheel alignment is performed’. Impex looks up what your vehicle needs when it quotes the windshield.

Static and dynamic calibration

There are two methods, and some cameras need both.

Static calibration

In a static calibration, I-CAR says, ‘a target or multiple targets are positioned in certain locations in front of the vehicle, then a scan tool starts an aiming procedure’. The car does not move. The targets have to stand at measured distances on level ground with enough clear space, which is why static calibration needs a suitable place to be set up.

Dynamic calibration

A dynamic calibration has the vehicle driven down the road, sometimes connected to a scan tool, at or below a certain speed for a specified time or distance. I-CAR notes that it may require roads clear of snow or rain, without heavy traffic or many curves. Around Winston-Salem, stretches of I-40 and US 421 outside rush hour often suit it; a wet day or a jam on Salem Parkway can stretch it out.

Impex says its technicians can complete both static and dynamic calibrations in one visit, and that calibration takes between 30 minutes and 2 hours. The time depends on the vehicle and on which method, or both, the automaker asks for.

Radar is a different part of the car

Adaptive cruise control and collision braking often use a forward radar as well as the camera. I-CAR says forward radar sensors sit in or behind the front bumper or grille. Radar calibration is normally required after the radar itself is replaced and may be required after bumper or grille removal or front structural repair. A windshield replacement does not by itself call for radar calibration, and a glass company that says every windshield needs radar work is overselling. Impex also performs ADAS radar calibration on site when a radar does need it, for example after front-end work.

Where the calibration is done

Impex’s windshield work in Winston-Salem is mobile, and it describes its calibration as done on site after the glass is in. A static calibration still needs level ground and room for the targets, and a dynamic one needs suitable roads and weather. When you book, ask where the calibration for your vehicle will be done, so the spot you choose for the visit suits the whole job. The mobile auto glass repair page explains what makes a good place for the work.

Signs a camera needs attention

• A warning light or message about the camera, lane keeping or pre-collision system after glass work.
• Lane warnings that sound when you are centred, or stay silent when you drift.
• Adaptive cruise that brakes for nothing, or keeps an odd distance.
• A message that driver assistance is unavailable, on a clear day with clean glass.

If any of these appear after a windshield replacement, contact Impex before relying on the systems. A camera can also lose its aim after other work, such as a wheel alignment on some models, as the I-CAR Subaru example shows.

What to tell Impex when you book

Calibration is planned from the vehicle’s own requirements, so a few details at the quote stage save time on the day:

• The year, make, model and trim, and the VIN from the dash or the driver’s door frame.
• Which driver assistance features the car has, if you know: lane departure warning, lane keeping, automatic emergency braking, adaptive cruise control.
• Whether a warning light is already on, or was on before the glass broke.
• Any recent work on the front of the car, such as a bumper, grille or wheel alignment, since I-CAR lists some of these as calibration events too.
• Where the car will be for the visit, and whether there is level ground with room in front of it.

If the windshield on your car carries a rain sensor, a heads-up display area or a heated section as well as the camera, the VIN is how the right glass is found. A camera can only be calibrated correctly through the glass it was designed to look through.

After the calibration

When the work is done you should see no camera or driver assistance warnings on the dash. On your first drives, notice whether lane warnings sound when you actually drift and stay quiet when you are centred, and whether adaptive cruise keeps a steady distance. Keep the area of glass in front of the camera clean, and replace worn wiper blades, since streaks across that patch blur what the camera sees. If anything feels wrong, stop relying on the systems and contact Impex so the calibration can be checked.

Calibration and your insurance

When a windshield is replaced through comprehensive coverage, the calibration the vehicle needs is part of the same repair. Impex works with all major insurance providers and includes calibration in the quote where the car needs it, so the insurer sees the whole job. Under G.S. 58-3-180 you choose the shop, including one that calibrates on site rather than one that sends you to a dealership afterwards.

If the damage is still a chip, a repair avoids changing the glass and so avoids the calibration altogether. If the glass must come out, the full visit is set out on the windshield replacement in Winston-Salem page. Door and back glass rarely involve the forward camera; see back and side glass replacement.

Questions people ask