In most newer vehicles, yes. If your car has a forward-facing camera mounted behind the windshield, that camera usually needs to be calibrated after the windshield is replaced. Calibration re-aims the camera so features like automatic emergency braking, lane keeping and adaptive cruise control see the road where the car expects it to be. This guide explains what windshield calibration is, why it matters, how it is done and what to ask before you get your car back.
What is ADAS technology, and what is calibration?
ADAS stands for advanced driver assistance systems. These are the safety systems in modern vehicles that use cameras, radar and other sensors to help you drive: lane departure warning, lane keep assist, forward collision warning, automatic emergency braking, adaptive cruise control, traffic sign recognition, blind spot monitoring and automatic high beams. Most ADAS systems depend on a camera mounted near the rearview mirror, behind the windshield, that reads lane markings, signs and the vehicles ahead.
ADAS calibration, often called ADAS recalibration, is the process of aligning those sensors to the exact angle and position the vehicle manufacturer specifies. A camera that is off by a fraction of a degree can misjudge where a lane line or another car is, especially at a distance. Proper calibration keeps the sensor alignment within the manufacturer's tolerance so the driver assistance features react the way they were designed to.
Why does a new windshield affect the camera?
The camera is mounted to a bracket on the windshield itself. When the glass is replaced, the camera comes off and goes back on a different piece of glass. Small differences in how the new windshield sits in the frame, the bracket position and the glass itself can change the camera's view. Calibration resets the camera to the new windshield.
This is now the norm, not the exception. An AutoBolt analysis reported by Repairer Driven News found that 89% of model year 2023 and newer vehicles require calibration after windshield replacement, up from 25% of model year 2016 vehicles.
Signs your ADAS cameras need recalibration
- A warning light or message for lane keeping, collision warning or the camera system
- Lane keep assist that steers late, early or toward the line
- Forward collision warnings that go off for no reason, or not at all
- Adaptive cruise control that brakes or accelerates unexpectedly
- Automatic high beams or traffic sign recognition that stop working correctly
A missing warning light does not mean the camera is aimed correctly. Many cars will not warn you that a camera is slightly off. The only way to know is to calibrate it to the manufacturer's procedure.
Static vs. dynamic recalibration
There are two main ways to calibrate a windshield camera, and the vehicle manufacturer decides which one your car needs.
- Static calibration is done indoors with the car parked. A technician places targets at precise distances in front of the car and uses a scan tool to tell the camera where those targets are. Because it is indoors, weather and traffic do not affect it.
- Dynamic calibration is done by driving the car on well-marked roads at set speeds while a scan tool guides the camera through its setup. Rain, snow, low sun, faded lane markings or heavy traffic can delay a dynamic recalibration.
Some vehicles need one, some need the other, and some need both, a static calibration followed by a dynamic one. The calibration procedure, and the equipment and procedures it requires, are specific to each make and model, so a precise calibration starts with the manufacturer's service information for your specific vehicle.
How long does it take to calibrate a windshield?
It depends on the vehicle and the type of calibration. Some calibrations take well under an hour. Others take longer, especially when a car needs both static and dynamic calibration or when the road conditions for a dynamic calibration are not right. Plan on the car being at the shop for at least part of a day.
Insurance coverage and ADAS recalibration cost
When the windshield is replaced through an insurance claim, the calibration the manufacturer requires is usually part of the repair. Ask your insurer and the shop to confirm before the work starts. If you are paying out of pocket, ask for the calibration to be listed on the estimate so you are not surprised by it later.
ADAS recalibration cost depends on the vehicle, how many sensors are involved and whether it needs a static calibration, a dynamic recalibration or both. A car that needs only a short drive cycle costs less to calibrate than one that needs targets set up indoors and a road test afterward. The shop should be able to tell you which calibrations your car needs before the work starts.
Glass, auto glass safety and ADAS accuracy
Not every windshield is the same. The camera looks through a specific area of the glass, and the clarity, thickness and shape of that area affect what the camera sees. Many manufacturers specify OEM glass, or glass that matches it, for vehicles with windshield-mounted cameras. A poor windshield installation can also shift the glass enough to throw off the camera.
The Auto Glass Safety Council publishes installation standards for the auto glass industry. Whether your glass work is done by an auto glass shop, a dealership or a body shop, ask which glass will be used and whether the shop will handle the calibration or send the car somewhere else for it.
What other repairs require ADAS calibration?
The windshield is the most common trigger, but it is not the only one. Sensors may also need to be calibrated after:
- Bumper cover or grille repair or replacement, where radar sensors are often mounted
- A wheel alignment or suspension work that changes the car's ride height or thrust angle
- A side mirror replacement, on cars with blind spot or surround view cameras
- Any collision that hits the front, rear or sides of the car
- Airbag deployment
Questions to ask before you get your car back
Many vehicles will not tell you when a calibration was skipped, so ask the shop directly:
- Does my vehicle require calibration after this repair, according to the manufacturer?
- Was it a static calibration, a dynamic calibration or both?
- Can I get a printout or report showing the calibration was completed?
- Were the driver-assist systems checked after calibration?
Automatic emergency braking and other ADAS features to check after a repair
After the calibration is done, pay attention to how the car behaves for the first few drives. Lane assist should keep you centered without pulling toward the line. Adaptive cruise control should hold a steady gap to the car ahead. Lane departure alerts should only sound when you actually drift. Blind spot monitoring lights should come on when a car is beside you. If anything feels off, or a warning light comes back on, return to the shop. It is far better to recheck a calibration than to find out it is wrong when automatic emergency braking is needed.
ADAS calibration at Gateway Auto
When your car comes to our collision center at 110th and Harrison in La Vista for body repair, including a windshield replaced as part of a collision repair, ADAS calibration is done at our shop. We follow the manufacturer's repair procedures for your vehicle so your driver-assist systems are checked before you get the car back. Collision estimates are free and walk-in, or you can start with photos online, and we work with every insurance company.
Frequently asked questions
Do all cars need calibration after windshield replacement?
No, only cars with a camera or sensor mounted to the windshield. Most newer cars have one, so check with the shop or your vehicle manufacturer before the glass is replaced.
What happens if I skip windshield calibration?
Your safety features may not work as designed. Automatic braking could react late or not at all, and lane keeping could steer you toward the line instead of away from it.
How much does ADAS recalibration cost?
It varies by vehicle and by the type of calibration. When it is part of a covered collision or glass claim, it is usually included in the repair. Ask for the calibration to be listed on your estimate.
Can I drive my car before the camera is calibrated?
The car will usually drive normally, but you should not rely on the driver-assist features until the calibration is done.
What does it mean to calibrate a windshield?
It means calibrating the camera mounted to the windshield, not the glass itself. The camera is re-aimed so it reads the road correctly through the new windshield.
Does Gateway calibrate cars after collision repairs?
Yes. ADAS calibration is done at our shop as part of our collision repairs. Call (402) 932-0500 with questions about your vehicle.
Written by Ben Toscano, co-owner of Gateway Auto, a family-owned repair and collision shop serving Omaha since 2002.
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