Now Why Is That Light Blinking?!?!

Jake Hilliard • January 6, 2026
Graphics Effect | Tires Too Auto Repair

A Guide to Driver Assistance Systems & Calibration in Londonderry, NH

If you drive a newer vehicle, you’ve likely grown used to your car "helping" you drive. Whether it’s a nudge back into your lane, a beep or indicator light when someone is in your blind spot, or your car braking for you in an emergency, these features are part of your Advanced Driver Assistance Systems (ADAS).

At Tires Too in Londonderry, NH, we specialize in the advanced diagnostics and calibrations required to keep these high-tech systems functioning safely.


What is ADAS Calibration and Why Does It Matter?

ADAS relies on a complex network of cameras, radar, and ultrasonic sensors. For these systems to work, they must be "aimed" with microscopic precision.

Calibration is the process of aligning these sensors so the car’s "eyes" see exactly what is on the road. If a sensor is off by even a fraction of a degree, it could miscalculate the distance of a car ahead by several feet, potentially failing to brake when needed.


Common Questions: When do I need ADAS calibration?

Look for "trigger events" that necessitate a trip to the shop. You likely need a calibration if:

  • You just replaced your windshield: Most forward-facing cameras are mounted to the glass. Even a slight change in glass thickness or position requires a recalibration.
  • You had a wheel alignment: Changes to your car’s thrust angle or steering position affect where the sensors are "looking."
  • You were in a minor fender bender or accident: Impact to a bumper can shift radar sensors out of place. Repairs and replacement of parts of your vehicle require those new or reinstalled components to be calibrated.
  • You have a "System Unavailable" light: This is your car’s way of saying its sensors are confused and need professional diagnostics.
  • The system has never been calibrated. While cars should be correctly calibrated when new, studies have shown that cars with no history of accidents or repairs are found out of calibration. Calibrating these vehicles showed consistent improvement in the accuracy of ADAS systems. 


Why Choose Tires Too for Advanced Diagnostics?

While many shops handle basic oil changes, Tires Too is one of the few facilities in the Southern New Hampshire area—including Salem, Hudson, and Derry—equipped with the specialized targets and software required for Static and Dynamic Calibrations.

 

Adaptive Cruise Control - Ensures the radar correctly measures the speed of the car ahead.

Lane Keep Assist - Aligns the camera to recognize lane markings accurately.

Emergency Braking - Calibrates the "stop" signal to prevent collisions.

Blind Spot Monitoring - Checks rear-facing sensors for side-impact safety.


Expert Care for All Makes and Models

We perform maintenance and repairs on nearly all makes and models—from domestic trucks to European luxury imports. Our ASE-Certified Technicians use dealership-level technology to ensure your vehicle meets factory safety specifications.





Ford Instrument Cluster With Blind Spot Warning Being Shown On Screen.

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