Why can a windshield or bumper repair need a sensor check?
Many cars have driver-assist cameras and sensors that have to be aimed correctly to work. Repair guidance says they may need calibration, which means re-aiming and checking them, after a windshield or bumper is replaced.
What are driver-assist sensors?
ADAS stands for advanced driver assistance systems: vehicle technologies "designed to help drivers avoid collisions," using cameras, sensors and radar. They support features such as automatic emergency braking, lane keeping, blind-spot warning and parking assist.
Where do the sensors sit?
I-CAR lists a camera behind the windshield, radar and sonar in the front and rear bumpers, ultrasonic sensors around the vehicle, and blind-spot sensors in the side mirrors. AAA says sensors may be "in or behind the front and rear bumpers," and that even minor incidents can damage them. Which sensors a car has, and where, depends on its make, model and year.
What does calibration mean?
Calibration means making sure the sensors are properly aligned and communicating with the vehicle's control systems.
When may it be needed?
I-CAR says that when a windshield is replaced, the forward camera behind it must be recalibrated, and that recalibration is "critical after replacing windshields, bumpers, or suspension components." It may also apply after structural work that could affect sensor alignment. AAA says that after a sensor is replaced, the system "must be calibrated, which requires special training, tools and information."
A collision and the repair work can both affect the sensors, and a wrong repair can leave a system not working as designed.
Does every repair need it?
No. The car's make, model and year, the sensors it has, and how close the damage or repair was to a sensor all matter. Needs vary by car, and the maker's repair information is the place to check. This page does not list requirements for any make or model.
How is calibration done?
The method varies by vehicle and system.
What can I ask?
- Does my car have cameras or radar near the parts being repaired or replaced?
- Does the maker's repair information call for calibration after this repair on my model?
- Is it done in the shop, on a road test, or by another business?
- Was the car scanned before and after, and can I get proof the system checked out?
- Who is responsible if a warning light comes on afterward?
General information only. This page does not say what any iDeal shop offers. Naming a source does not mean any iDeal shop is certified by it or affiliated with it.
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Tell us what happened and where the damage is. A person at iDeal Automotive Group will try to reach you and connect you with one of our body shops.
Questions about sensors after a hit? Tell us what happened.
Use the estimate form Calls to this number are answered by iDeal Automotive Group, who connect you to one of our body shops. Ask for a specific shop if you have one.(917) 672-3726Read next
What are the signs of hidden damage after a car accident?Some damage from a fender bender may not be visible, and even a minor hit can affect sensors that sit behind a bumper.
What is under a car bumper?A bumper is more than its painted cover.
What are the warning signs of brake and alignment problems?AAA lists squealing, shaking when braking, a harder or spongy pedal, pulling to one side and a puddle under the car as signs your brakes may need service, and says to have a technician check them as soon as possible.