Under New Mexico seat belt law, every person riding in a passenger vehicle must have a seat belt properly fastened whenever the vehicle is moving, and an officer can stop you for an unbuckled belt alone. A violation carries a $25 base fine plus court fees, and the Motor Vehicle Division adds two points to your driving record.1Motor Vehicle Division. Point System Regulations and Schedule
Who Has To Be Buckled
Section 66-7-372 of the New Mexico Motor Vehicle Code requires every occupant of a qualifying vehicle to wear a properly fastened seat belt at all times when the vehicle is in motion on any street or highway. The rule covers vehicles with a gross vehicle weight of 10,000 pounds or less that were manufactured with seat belts meeting federal safety standard number 208. In practice, that means essentially every passenger car, SUV, minivan, and light pickup on the road.2Justia. New Mexico Code 66-7-372 – Safety Belt Use Required; Exception
Back-seat passengers are included. The original 1985 statute applied only to front-seat occupants, but a 2001 amendment removed that limit and extended the requirement to everyone in the vehicle.2Justia. New Mexico Code 66-7-372 – Safety Belt Use Required; Exception Because the statute targets vehicles that were manufactured with factory belts, older vehicles that came off the line without them fall outside its reach. That mostly means pre-1964 models, since federal law has required front belts in new cars since that year.3Justia. New Mexico Statutes Section 66-3-874 – Safety Belts Required
Enforcement is primary. An officer who sees an unbuckled driver or passenger can initiate a traffic stop on that basis alone, and the Safety Belt Use Act expressly says it “shall be enforced whether or not associated with the enforcement of any other statute.”4New Mexico Legislature. An Act Relating to Motor Vehicles; Requiring Safety Belt Use by All Occupants of Certain Motor Vehicles You don’t need to be committing another violation for a seat belt stop to be lawful.
Rules for Children
A separate statute, Section 66-7-369, requires that every passenger under 18 be properly secured in either a child restraint device or a seat belt. The driver is responsible for making sure younger passengers are restrained correctly, and the fine for a child restraint violation is also $25.5Motor Vehicle Division. Schedule of Assessments
The statute doesn’t specify a particular seat type by age, but NHTSA’s age-and-size guidance is the standard most parents and safety officials look to:6National Highway Traffic Safety Administration. Car Seat and Booster Seat Safety, Ratings, Guidelines
- Under age 1: rear-facing car seat.
- Ages 1 through 3: rear-facing as long as possible, then forward-facing with a harness and tether.
- Ages 4 through 7: forward-facing seat until outgrown, then a booster.
- Ages 8 through 12: booster seat until the vehicle’s lap-and-shoulder belt fits properly, and the back seat through age 12.
The Fine and the Points
The base fine for an adult seat belt violation is $25, with court fees and penalty assessments pushing the actual amount you pay somewhat higher.7New Mexico Courts. List of Those State Statute Charges That Have a Set Fine Amount The real sting is on your driving record. The Motor Vehicle Division assigns two points per seat belt violation, and points accumulate across all your citations.1Motor Vehicle Division. Point System Regulations and Schedule Enough points over time can trigger license suspension, so a seat belt ticket is worth more than its dollar figure.
The Two Exceptions
Section 66-7-372(B) carves out only two exemptions from the belt requirement:4New Mexico Legislature. An Act Relating to Motor Vehicles; Requiring Safety Belt Use by All Occupants of Certain Motor Vehicles
- A person who carries a written statement from a licensed physician certifying that they cannot wear a seat belt for medical reasons. A verbal claim at a traffic stop isn’t enough; you need the document.
- A United States Postal Service rural letter carrier performing delivery duties.
There is no exception for farm or ranch work, no general commercial-vehicle exception, and no exception for short trips. If the vehicle has factory-installed belts and weighs 10,000 pounds or less, the law applies regardless of what you’re hauling or where you’re driving.
Not Wearing a Belt Won’t Reduce an Injury Claim
If you’re hurt in a crash and weren’t buckled, the other driver’s insurance company cannot use that against you to shrink your compensation. The statute is unusually blunt about it: failure to wear a seat belt “shall not in any instance constitute fault or negligence and shall not limit or apportion damages.”8Justia. New Mexico Statutes Section 66-7-373 – Enforcement Programs
New Mexico courts have held the line on this. In Rodriguez v. Williams, the Court of Appeals ruled that Section 66-7-373(A) bars any consideration of seat belt non-use in a comparative fault analysis.9New Mexico Courts. Williams v. Rodriguez An earlier case, Norwest Bank N.M. v. Chrysler Corp., reached the same result for rear-seat passengers.8Justia. New Mexico Statutes Section 66-7-373 – Enforcement Programs The practical consequence is that a $25 seat belt citation has no legal bearing on a personal injury claim arising from the same accident, even though some other states let defendants argue that unbuckled plaintiffs made their own injuries worse.
That is a legal rule, not a safety rule. Unbuckled occupants still suffer worse injuries in crashes, and your own medical costs and recovery don’t care what the comparative-fault statute says.
Rear Seat Reminders Coming to New Vehicles
Federal vehicle standards are tightening around seat belt reminders. Updated front seat warnings, designed to be longer and louder, take effect for vehicles manufactured on or after September 1, 2026.10Federal Register. Federal Motor Vehicle Safety Standards; Occupant Crash Protection, Seat Belt Reminder Systems, Controls and Displays Starting September 1, 2027, all new passenger vehicles must include rear seat belt reminder systems that alert the driver when a back-seat passenger unbuckles while the vehicle is moving.11National Highway Traffic Safety Administration. Federal Motor Vehicle Safety Standards; Occupant Crash Protection, Seat Belt Reminder Systems, Controls and Displays New Mexico’s law applies to those vehicles the same as any other; the reminders will make it harder to forget, but the legal obligation is the same one that’s been on the books for years.