ADAS calibration after windshield replacement

What is ADAS and why does it need calibration?

ADAS (Advanced Driver Assistance Systems) is the umbrella term for the modern safety and driving support systems in a car: lane keeping/lane departure, automatic emergency braking (AEB), adaptive cruise control, collision warning, traffic sign recognition, automatic high-beams and beam control. The brain behind most of these is a forward-facing camera mounted at the top of the windshield, typically behind the mirror. The camera looks ahead, reads the road, identifies cars, pedestrians, cyclists and signs, and feeds data to the car's ECUs which make decisions within milliseconds.

Why is calibration necessary after a glass change?

The camera is mounted in or just behind the windshield with extreme precision — an angular error of just 1° can shift the camera's focal point 30 metres in front of the car. When the glass is replaced, the new pane will sit micrometrically offset in the body compared to the old one. Even with perfect fitment, the camera's line of sight will not match the originally factory-set line. The result is that lane keeping can pull the car the wrong way, AEB can fire too late or not at all, and adaptive cruise can mismeasure the distance to the car ahead. That is why car makers require the camera to be recalibrated after every glass change involving the camera.

Static vs dynamic calibration

There are two main calibration types. Static calibration is done indoors at the workshop with the car positioned precisely in front of a dedicated target board (typically a patterned cloth on a frame about 1.5–4 m in front of the car, depending on the brand). We use the manufacturer's diagnostic tool and step through the procedure — the camera registers the target and the software confirms or adjusts the calibration. Dynamic calibration is done by driving under specific conditions: typically 30–80 km/h on an even road with clear markings for 15–30 minutes. Many cars need both. We have the equipment and software for both methods.

Which cars require calibration?

As a rule of thumb: every car from 2018 onwards has ADAS features that require calibration after a glass change. Many cars from 2014–2017 do too. You can spot it by checking whether the car has lane keeping, AEB or adaptive cruise. Brands where it is mandatory include Audi, BMW, Mercedes, Volvo, Tesla, Volkswagen, Skoda, Ford, Toyota, Hyundai, Kia, Mazda and Honda. We can check your specific model and tell you whether it is required.

Time and price

Calibration typically takes 30 minutes to 2 hours depending on the brand and whether dynamic driving is required. The price is normally 1,500–4,000 NOK and is usually included in the price for the glass change with us — we finish the job before you pick up the car. We take a photo of the calibration report and provide documentation that the sensors are within manufacturer spec. This can be important documentation at later resale.

Consequences of skipping calibration

Skipping calibration is not just a theoretical risk — it can have serious safety consequences. The AEB system can fail to brake in a critical situation, lane keeping can pull the car into the wrong lane, and adaptive cruise can hold the wrong distance to the car ahead. In addition most modern cars will display a fault on the dash ("Front camera not available") and disable the systems. In the event of a collision involving ADAS, the insurer and police will investigate whether the system was properly calibrated — missing documentation can affect the liability picture.

Book windshield service online or call us on 41 17 32 24.