Does windscreen replacement require ADAS calibration?
Windscreen replacement can make ADAS calibration relevant, but there is no universal rule. The requirement depends on the vehicle, system, work carried out and applicable procedure.
Sometimes — but not every windscreen replacement automatically requires ADAS calibration. If the vehicle uses a camera or other ADAS equipment associated with the windscreen, the applicable vehicle procedure needs to be checked. That procedure determines whether calibration is required and how it should be carried out.
Why can windscreen replacement affect ADAS?
Some forward-facing ADAS cameras are mounted behind the windscreen and view the road through a defined area of the glass. The system relies on the camera's position, the relevant glass area and the relationship between the camera and vehicle.
Replacing the windscreen can therefore be relevant to calibration because the work may affect the glass through which the camera views the road, or involve the camera and its mounting relationship. The applicable vehicle procedure determines what the work requires.
Does every windscreen replacement need calibration?
No. Some vehicle procedures specify calibration after windscreen replacement, while others may not. The requirement needs to be established for the vehicle, system and work carried out rather than assumed from the replacement alone.
The decision should be technically justified from the vehicle, ADAS system, repair operation and manufacturer procedure. Calibration is not something to add automatically just in case.
What if the vehicle has a camera behind the windscreen?
A forward-facing camera is an important indication that ADAS needs to be considered, but its presence is not the complete technical decision.
The vehicle and system still need to be identified, and the applicable procedure checked, before deciding whether calibration is required and which method applies.
Why the correct windscreen still matters
The glass through which a camera views the road needs to match the vehicle's required windscreen specification. Its camera area, optical properties and mounting compatibility may all be relevant.
Correct glass specification and correct camera calibration are related, but they are not interchangeable. Fitting the correct glass does not itself calibrate the camera, and calibration cannot compensate for incorrect glass.
Why manufacturer procedure matters
Calibration requirements vary by vehicle, system, repair operation and manufacturer procedure. There is no single answer that applies to every windscreen replacement.
That is why the useful question is not simply whether windscreens need calibration. It is what the applicable procedure requires for this vehicle and system after this operation.
Static or dynamic calibration?
Some procedures use static calibration with the vehicle stationary and specified targets or equipment. Others use a dynamic driving procedure, while some may require more than one stage.
The required method comes from the applicable procedure rather than customer or workshop preference. The related guide below explains the distinction in more detail.
Does a warning light tell you?
A dashboard warning should not be used on its own to decide whether calibration is required. The absence of a warning does not replace checking the applicable vehicle procedure.
Warning information and diagnostic evidence may help assess a system's condition, but they do not create a universal calibration rule.
What happens after the windscreen is replaced?
The vehicle and relevant ADAS system are identified, then the applicable procedure is checked to determine whether calibration is required and which method applies.
Where calibration is specified, it is completed using the required method. The result is then verified and documented as applicable to the vehicle, system and procedure.
How Horizon approaches it
Horizon identifies the vehicle and relevant system, checks the applicable procedure and determines whether calibration is required before carrying out the specified method.
Static calibration is carried out at Horizon's Cardiff calibration facility. Dynamic calibration may be carried out mobile where the vehicle procedure and conditions allow. Completed work is documented as applicable.
Practical takeaway
A windscreen replacement does not create one universal calibration rule. Where ADAS is associated with the windscreen, the vehicle and applicable procedure need to be checked. If calibration is specified, it should be completed using the required method rather than assumed from the presence or absence of a warning light.
Related Guides
Technical review: Horizon Windscreens
Last reviewed: 9 September 2026