Alignment moves the wheels
Adjusts toe, camber, and caster so the tires roll straight and wear evenly. A mechanical service performed at the suspension.
Service explained
ADAS calibration vs wheel alignment: what's the difference?
If your repair invoice lists a wheel alignment and an ADAS calibration as two separate line items, you are not being double-charged. They are two completely different procedures that often need to happen together, in a specific order. Here is what each one actually does, why they get confused, and how to tell which one your vehicle needs.
Calibration aims the sensors
Re-teaches forward cameras, radars, and parking sensors where 'straight ahead' is, so lane keep and emergency braking trigger correctly.
Order matters
Alignment must come first. Calibrating ADAS sensors on a misaligned vehicle gives the car a false reference for centerline.
Often both, sometimes one
Collision and suspension work usually need both. A windshield-only replacement typically needs calibration with no alignment.
What wheel alignment actually does
Wheel alignment is a mechanical adjustment of your suspension. A technician puts the vehicle on an alignment rack, attaches targets to each wheel, and measures three primary angles: toe (whether the tires point inward or outward), camber (whether they tilt in or out at the top), and caster (the forward or rearward tilt of the steering axis). The tech then turns adjustment points on the control arms, tie rods, and strut mounts until those angles match the manufacturer's specification for your year, make, and model. The goal is a vehicle that tracks straight, steers predictably, and wears its tires evenly across the tread. Alignment has been a standard service for as long as cars have had steering wheels — it is fundamentally about geometry between the road and the rubber.
What ADAS calibration actually does
ADAS calibration is a software and aiming procedure for the driver-assist sensors on your vehicle. Modern cars carry a forward-facing camera mounted to the windshield, one or more radar units behind the grille or in the bumpers, ultrasonic parking sensors, and often a rear-view or 360 camera. Each of these sensors reports what it sees to the car's computer, which then decides whether to warn you about lane drift, brake automatically for a pedestrian, or hold a set distance from the car ahead. For any of those decisions to be correct, the sensors have to know exactly where they are pointing relative to the vehicle's centerline. Calibration is the process of telling the sensors, with targets, fixtures, and a factory scan tool, where straight ahead is. Static calibration uses precisely positioned target boards in a controlled bay. Dynamic calibration requires driving the vehicle on marked roads at specified speeds. Many vehicles need both.
The critical interaction: why order matters
Here is the part most drivers and a surprising number of body shops get wrong. ADAS calibration uses the vehicle's thrust angle — the average direction the rear wheels actually push the car — as one of its reference points. If your rear toe is out of spec, the car's centerline as the sensors see it is not the same as the car's centerline as the road sees it. Calibrating the forward camera before fixing the alignment means the camera will be aimed straight relative to a vehicle that is itself crabbing slightly down the road. On the highway, lane keep assist will tug the wheel for no reason. Adaptive cruise will misjudge the position of the car ahead. Automatic emergency braking may activate late. The correct sequence is always alignment first, then calibration. If a shop wants to calibrate before aligning, ask why. There is rarely a good answer.
When you need both, when you need one
You need both alignment and ADAS calibration after a collision involving any frame, suspension, or windshield damage; after replacement of struts, control arms, tie rods, or knuckles; after a wheel-and-tire upgrade to a different overall diameter; or after a significant pothole or curb strike where you notice the steering pulling. You typically need only calibration — no alignment — after a windshield replacement on a vehicle with a camera mounted to the glass, after a front grille or bumper cover replacement where the radar is unbolted and reinstalled, or after a mirror replacement on vehicles with side-mounted blind-spot cameras. You typically need only alignment — no calibration — after rotating tires or replacing tires with the same size, if the vehicle has no ADAS sensors that were disturbed.
Find your car's specific procedure.
Each manufacturer has its own ADAS suite, warning messages, and calibration steps. Pick yours for the brand-specific procedure.
Next step
Get a quoteNot sure which service your vehicle needs?
Bring in your repair estimate or insurance scope of work and we will walk you through exactly what your vehicle requires, in the right order, on one invoice.