Illinois collision repair and auto glass shops have a new bill to track: legislation that would require ADAS disclosure before windshield work begins and written confirmation of calibration outcomes after the job is complete.
The Illinois House Insurance Committee voted 14-0 on March 18 to advance House Bill 4373, the Motor Vehicle Glass Repair Act, which was filed Jan. 12 by Rep. Thaddeus Jones, a Democrat representing District 29. The bill advanced to second reading April 7 and was placed on the calendar for a third reading and short debate, one step from a full House vote.
The bill is relevant to collision repair operations that perform or sublet windshield work, particularly those on vehicles equipped with forward-facing cameras and sensors tied to ADAS features such as automatic emergency braking and lane departure warning.
It’salso part of growing legislative trendacross states regarding glass and ADAS —New York enacted comparable legislation in December 2025. Arizona, Florida, and Utah have also passed bills with similar ADAS disclosure and calibration notification requirements, according to the AGSC's state legislation tracking page.
California is also considering comparable legislation. Senate Bill 988, the California Motor Vehicle Glass Act, and Maryland is consideringwhich wouldestablish statewide licensing requirements for businesses performing ADAS recalibrations.
What the Illinois Bill Would Require
According to the full text of the bill, the Motor Vehicle Glass Repair Act would establish the following obligations for motor vehicle glass repair shops before service begins on an insured customer's vehicle:
The shop must notify the customer whether the vehicle has an ADAS, and if so, whether calibration or recalibration is needed following windshield repair or replacement, as recommended by the vehicle manufacturer.
The shop must also disclose whether it will perform the calibration in-house in a manner that meets the manufacturer's specifications, or whether the customer will need to take the vehicle to an OEM-certified dealership or a qualified specialist.
After any calibration or recalibration is performed, the shop must provide written notice stating whether the procedure was successful. If it was not successful, the shop is required to inform the customer that the vehicle should be taken to the vehicle manufacturer's certified dealership or a qualified specialist.
What Illinois Shops Should Do Next
HB 4373 was placed on the calendar for a third reading in the Illinois House as of April 7. If it passes the full House, it would proceed to the Illinois Senate. Illinois shops can monitor its status on the Illinois General Assembly's bill status page.
Regardless of how HB 4373 proceeds, reviewing whether your shop or your glass sublet vendor currently documents ADAS status, calibration need, and calibration outcome in writing is a sound operating practice. If similar bills continue passing in neighboring states, Illinois shops may face these requirements sooner or later.
If you sublet windshield work to an outside vendor, consider confirming that your vendor is capable of identifying ADAS-equipped vehicles, performing or referring calibrations, and providing written confirmation of results. Several states now require that documentation by law.
Industry Opposition
The Independent Glass Association (IGA) has announced its opposition to HB 4373 as introduced, saying the legislation mirrors a national template promoted by insurers and their aligned third-party administrators rather than addressing consumer protection needs. The IGA says it will only support the bill if it is meaningfully amended.
"HB 4373 is not about consumer protection, it is about control," Gary Hart, executive director of the IGA, said in a statement on the association's website. "This bill follows the same NCOIL template that is being promoted nationwide by the Safelite Group and their insurance partners to tighten their grip on the auto glass market."
The IGA contends that HB 4373 places new compliance burdens on independent repair shops while leaving insurer and third-party administrator practices largely unaddressed. The association has raised concerns that "fair market" pricing language in the bill would be tied to insurer-derived benchmarks rather than competitive, independent market pricing, and that restrictions on shop-to-insurer communication could complicate routine claims handling, according to the IGA's opposition page.
The IGA has stated its opposition ahead of a full House floor vote, which the bill is now positioned to receive after clearing the Insurance Committee and advancing through two readings in the House.
