Will Car Mods Confuse Your Vehicle’s Safety Tech?
Published Date: 10/29/2026
Notice
Summary
NHTSA is hosting a free workshop on December 10, 2026, to talk about how car upgrades made after buying a vehicle might affect safety tech like advanced driver assistance systems (ADAS). If you want to join in person, you need to register by December 3. After the workshop, there’s a 90-day window to share your thoughts, so everyone’s voice can help shape future rules and keep cars safer.
Analyzed Economic Effects
5 provisions identified: 5 benefits, 0 costs, 0 mixed.
Warning: certain vehicle mods can degrade ADAS
NHTSA states that changing vehicle parameters such as ride height, bumper geometry, body panels, or wheel offset can alter ADAS calibration and may reduce detection performance or cause false activations, which could create potential safety hazards. This information is being highlighted as part of the Workshop discussion on aftermarket modifications and ADAS performance.
Free in‑person workshop — register by Dec 3
You can attend a free, in-person NHTSA Workshop about aftermarket vehicle modifications and ADAS on December 10, 2026 at the West Atrium of DOT Headquarters (1200 New Jersey Avenue SE, Washington, DC). Registration is required and must be completed no later than December 3, 2026; the event will not be live streamed but it will be recorded and posted on NHTSA's website afterward.
90‑day public comment window (deadline Apr 19, 2027)
After the Workshop, the public docket will be open for comments for 90 days and NHTSA instructs commenters to submit all comments no later than April 19, 2027. You can submit comments electronically at Regulations.gov, by fax, or by mail/hand delivery, and all comments will be posted publicly.
Accessibility accommodations provided
NHTSA will provide a sign language interpreter and closed captioning services at the Workshop, and you may request other special accommodations during registration. Indicating needed accommodations during registration ensures NHTSA can provide them for the December 10, 2026 event.
Opportunity to influence future ADAS rules
NHTSA says the Workshop and the accompanying comment period are intended to let industry stakeholders, technical experts, and the public provide input that may shape future NHTSA actions or guidance on maintaining ADAS functionality after aftermarket modifications. Participating in the Workshop or submitting comments by April 19, 2027 gives you a formal channel to share data, experience, or suggestions.
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Key Dates
Department and Agencies
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