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Windshield Leak and Uncalibrated Forward Camera

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Windshield Leak and Uncalibrated Forward Camera

Your shop replaced the windshield on a 2022 Honda Civic after a 300 mm crack spread from a rock chip. The technician used an aftermarket urethane rated for a one-hour safe drive-away, installed a new windshield, and did not recalibrate the forward-facing camera. The customer returns 24 hours later with water dripping from the top right A-pillar and a lane-keeping assist warning on the dash. The pinchweld showed minor rust at the top right corner, which the technician cleaned and primed with a single-purpose primer. The urethane bead was 8 mm wide and 10 mm high. The shop's scan tool can perform a static camera calibration, and the shop has a calibrated target board. The insurer has approved replacement and one calibration, but not a second calibration.

1. Diagnose the water leak. What installation errors are most likely, and what correction is required?

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The leak is at the same corner where rust was found, so the likely cause is adhesion failure at the pinchweld, not a random glass defect. Cleaning minor rust and applying a single-purpose primer is often insufficient; the rust must be removed to sound metal, treated, and covered with the correct primer system for the pinchweld and urethane. If the primer was the wrong type or was applied over residual contamination, the urethane can lift and leave a water path. The 8 mm by 10 mm bead may be within a general range, but the bead must follow the glass contour and be continuous at the top right corner; a small gap or a bead placed too far inboard can leak. Correction requires removing the windshield, cutting out the old urethane, cleaning the pinchweld to bare metal, treating any remaining rust, applying the specified epoxy and urethane primers, and installing a new bead with the correct profile. The glass should be replaced if removal damages it. Water-test the repair before returning the car.

2. Was the shop obligated to calibrate the camera? Explain using ADAS requirements and the warning.

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Yes. The forward-facing camera looks through the windshield, and replacing the glass can change the camera's optical path or its mounting relationship even if the bracket was not removed. The lane-keeping assist warning after the replacement is consistent with an uncalibrated or failed camera system. The shop should perform a pre-scan and post-scan, clear any codes, and follow the OEM static calibration procedure with the calibrated target board at the specified distance and angle. A test drive may also be required if the procedure includes a dynamic step. The insurer approved one calibration, so the shop should use that approval rather than skipping calibration to save time. If the first calibration fails because of a damaged bracket, incorrect target placement, or a camera fault, the shop should document the failure and request the additional authorization needed. Returning the car with a lane-keeping warning is not a complete repair.

3. What should be done about the insurer's refusal to pay for a second calibration and the one-hour safe drive-away?

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Separate the two issues. The one-hour safe drive-away rating applies only when the urethane is installed under the product's conditions and the pinchweld is properly prepared. Because the car is leaking, the safe drive-away claim is not valid for this repair; the windshield must be removed and reinstalled, and the car should not be released until the leak is corrected and the urethane has cured per the manufacturer. For calibration, the insurer has already approved one calibration. The shop should perform that calibration after the windshield is reinstalled and the leak is fixed. A second calibration is not automatically needed; it is needed only if the first calibration cannot be completed or fails. Document the first calibration result, any DTCs, and the target setup. If a second calibration is required because of a failed first attempt caused by the shop's process, the shop may have to absorb it; if it is required because of a vehicle fault or OEM procedure, submit the evidence for supplement. In either case, do not release the vehicle with an active lane-keeping warning.