Vermont DMV defends annual vehicle inspection rules, clarifies brake-rust, emissions and inspection-technology practices

DMV staff told the House Transportation Committee that Vermont’s annual vehicle-inspection program remains necessary for public safety and consumer protection and described recent clarifications to the inspection manual, enforcement tools and technology used to reduce improper inspections.

The agency focused on a clarified brake-rotor rust standard — now measured as “half an inch cumulative per braking surface” and defined as swelling, delamination or pitting — and explained why surface rust alone is not an automatic failure. DMV staff also described the state’s OBD2 emissions checks (required on model-year 1996-or-newer vehicles), a one-year time-extension waiver for some emissions repairs, and the AVIP tablet and EVIN mismatch monitoring that improves record accuracy at inspection stations.

“These are inspection mechanics with no law enforcement training at all,” DMV staff said, explaining why the agency writes detailed inspection criteria and relies on the tablet-based AVIP system to create an auditable record of what was inspected. The staff member warned that instructing mechanics to refuse to let a motorist leave a station could discourage people from getting safety inspections: “We don’t want people being worried about bringing their car in for a safety inspection that they might…get a ticket, which is then gonna be hundreds more dollars.”

The committee heard technical detail on rust and rotor failures: DMV staff said the manual now defines rust as “any swelling, delamination, or pitting,” and that inspectors treat a cumulative loss of more than a half inch of braking surface on a rotor or drum as a failure. Staff showed photos and a case investigation in which a severely rusted control arm separated from the frame; the presentation noted that unibody vehicle designs make rocker-panel and frame component corrosion more likely to compromise crash protection than superficial rust on fender wells.

DMV explained the OBD2 (on-board diagnostics) inspection requirement stems from federal laws including the Clean Air Act and EPA rules and that the state enforces those requirements for vehicles model-year 1996 and newer. Staff noted OBD2 failure rates have fallen from about 18% in 2017 to roughly 4% today, and described a time-extension waiver that can be issued if the vehicle passes the safety portion of the inspection, the emissions repair estimate exceeds $200, the repair is not covered by warranty, and the vehicle did not receive a waiver the previous year. The waiver issues a valid sticker for the current year while giving the owner up to one year to complete the emissions repair.

On technology and enforcement, DMV staff described the AVIP tablet that links an inspection to the vehicle’s VIN and the weekly EVIN mismatch list investigators use to flag suspect entries (for example, VINs entered incorrectly or tablets plugged into the wrong vehicle). Staff said the system reduced obvious abuses that were common before tablet reporting: “When we first started this…1 station had 300 EVIN mismatches,” the presenter said; today the agency typically sees far fewer such mismatches and investigates each one. DMV investigators also described how complaints tied to a VIN prompt a review of inspection records and, when warranted, on-site examinations and progressive administrative penalties for stations or individual mechanics.

Committee members pressed the agency on affordability and outreach. Representative White asked whether faded license plates that are illegible would pass as an advisory rather than a failure; DMV staff responded that a faded plate would generally generate an advisory on the vehicle inspection report but remains a traffic-enforcement offense. Staff said they distribute bulletins and slides to mechanics through the AVIP portal and have sent clarifying memos about brake rust and other items (most recently in March 2025). They also noted outreach and training at technical schools and the availability of assistance programs such as Good News Garage and Reach Up for low-income Vermonters who need help with emissions repairs.

Committee members asked what metrics demonstrate safety benefits from inspections. DMV staff said direct causal data is difficult to gather because crash reports do not routinely record whether vehicle maintenance contributed; they pointed instead to reduced OBD2 failure rates, the investigative cases that uncovered dangerous defects, and comparative anecdotes about the condition of vehicles in states without inspections. Staff reported the program oversees roughly 550,000 inspections annually and about 1,100 inspection stations statewide; safety-related failures have averaged roughly 3% over the past five years, they said.

DMV investigators described criminal and civil work that goes beyond routine inspection oversight, citing examples including identity and title fraud, dealership embezzlement prosecutions, and an investigation linked to a crash where an allegedly faulty inspection was part of a manslaughter prosecution. The agency said it routinely assists other law enforcement agencies and is expanding canine and commercial-enforcement support.

The agency cautioned that changing inspection rules requires following the Administrative Procedures Act and related rulemaking steps — filing with the Interagency Committee on Administrative Rules, public notices and hearings, and review by the legislative committee on administrative rules — a process the presenter estimated typically takes about eight months. DMV staff said they are open to continued dialogue about affordability and inspection criteria but noted the balance between public safety and the cost burden on vehicle owners.

The committee did not take any formal votes during this briefing. DMV staff said they will continue outreach to mechanics and the public, maintain weekly EVIN mismatch monitoring, and continue education with technical schools and partner programs.