{ "source": "Cooked Index — occupational AI risk register", "page": "https://cookedindex.com/jobs/bus-and-truck-mechanics-and-diesel-engine-specialists/", "methodology": "https://cookedindex.com/methodology", "notice": "Verdicts are re-examined as evidence accumulates. Re-fetch before relying on this; the page above always carries the current score.", "scored_at": "2026-08-11", "model": "claude-opus-5", "occupation": { "title": "Bus and Truck Mechanics and Diesel Engine Specialists", "soc_code": "49-3031", "category": "Trades", "us_employment": 289960, "median_annual_wage": 61770 }, "verdict": "SAFE", "risk_resistance": 68, "contested": false, "near_boundary": false, "dimensions": { "task_resistance": 16, "embodiment": 19, "liability_shield": 9, "trust_premium": 11, "judgment_accountability": 13 }, "reasoning": { "task_resistance": "Diagnostics-by-code is genuinely being automated, but nothing in software drops a transmission, presses a wheel seal, replaces a DPF, or reseats a leaking air line on a trailer parked in gravel — that's why this sits at 16 rather than a clean 19.", "embodiment": "You work under a chassis on your back, on a creeper in a bay with no climate control, on roadside calls in weather, and inside engine compartments where reaching the No. 6 injector means removing the valve cover by feel — the only reason it isn't 20 is that some of the shift is at a laptop running OEM software like Cummins INSITE or DDDL.", "liability_shield": "No state licence is required to turn wrenches on a Class 8 truck, but FMCSA 396.19 requires you to be a qualified brake inspector to sign off brakes and 396.17 inspections, and ASE T-series plus 609 refrigerant certification is what shops hire on — a real credential gate, just one the shop owner and motor carrier ultimately carry the DOT liability for.", "trust_premium": "Fleet maintenance managers keep the mechanic who knows their specific 40 units, which spec'd engines run hot, and whose word on \"that one's not safe to dispatch\" gets believed without a second opinion — but the relationship travels with the shop and the work is verifiable by the repair, so it's not the product itself.", "judgment_accountability": "Deciding whether a cracked frame rail, a marginal drum thickness, or an intermittent ABS fault means out-of-service or another 10,000 miles is your call with an 80,000 lb vehicle and a CSA score behind it; it stops short of 16+ because OEM service specs, wear limits, and FMCSA appendix criteria give you hard numbers to hang most decisions on." }, "rationale": "The core of this job — pulling injectors, replacing turbos and clutches, chasing air-brake leaks, rebuilding after-treatment systems, and torquing head bolts on a Class 8 engine in a cramped bay or on a roadside — is physical work in awkward, dirty, non-standardized spaces that current robotics cannot touch. AI is already eating the diagnostic-lookup layer: fault-code interpretation, service-manual search, repair-order write-ups, and parts ordering are moving to software fast. What survives is the hands, the ear for a misfire, and the accountability for signing a DOT annual inspection or a brake job that has to hold at 80,000 lbs.", "outlook": "Demand holds through 2035 as freight and transit fleets age and electrify; AI takes over the diagnostics and paperwork, which shifts the job toward more wrench time per shift and a growing premium on EV/HV-qualified techs.", "what_would_raise_it": { "levers": [ { "dimension": "liability_shield", "change": "FMCSA already requires a qualified brake inspector (49 CFR 396.25) and a signed annual inspection report (396.17/396.21). A rule change making the individual technician — not just the motor carrier — personally sanctionable when a signed inspection precedes a brake-related crash, or a state adopting technician licensure for heavy-vehicle brake and steering work (as some states have floated in the wake of CVSA out-of-service data), would push this well up.", "plausibility": "plausible", "would_add": 4 }, { "dimension": "liability_shield", "change": "High-voltage certification for battery-electric and hydrogen buses/trucks becoming a legally required, individually held credential (NFPA 70E-style qualified-person rules, OSHA enforcement on live HV work) so that a named certified human must sign off on pack service and isolation.", "plausibility": "already happening", "would_add": 3 }, { "dimension": "trust_premium", "change": "Fleet liability insurers or self-insured carriers writing policy conditions that require documented ASE-certified (T-series) human inspection of brakes and steering at set intervals, refusing coverage for AI/remote-diagnostic-only sign-off — analogous to insurer-mandated crane and boiler inspection clauses.", "plausibility": "plausible", "would_add": 3 }, { "dimension": "judgment_accountability", "change": "Task-mix shift plus formalization: if OEM telematics auto-schedules routine service, the remaining human call is the out-of-service / 'is this truck safe to load' decision. A CVSA or carrier policy making that determination a named-technician written judgment (rather than a dispatcher's call) raises ownership of the consequential call.", "plausibility": "plausible", "would_add": 3 }, { "dimension": "task_resistance", "change": "Genuine two-tier job: as fault-code interpretation, manual lookup, parts ordering and repair-order write-up move to software, the residual day is intermittent faults, wiring-harness chafe, after-treatment root-cause, and post-collision structural judgment — the tier no diagnostic model closes. No law needed; visible where dealer groups already have AI triage front-ends.", "plausibility": "already happening", "would_add": 2 } ], "ceiling_note": "Embodiment at 19 is effectively capped — roadside and cramped-bay work is the hard ceiling for robotics and there is no route upward. Trust premium is structurally limited: fleet buyers purchase uptime and cost-per-mile, not human craftsmanship, so gains there must come through insurer or warranty conditions rather than customer preference." }, "adjudication": null, "employment_history": { "points": [ { "y": 2017, "emp": 260380, "wage": 46360 }, { "y": 2018, "emp": 264860, "wage": 47350 }, { "y": 2019, "emp": 266330, "wage": 48500 }, { "y": 2020, "emp": 253010, "wage": 50200 }, { "y": 2021, "emp": 261420, "wage": 48690 }, { "y": 2022, "emp": 271720, "wage": 54360 }, { "y": 2023, "emp": 285030, "wage": 58970 }, { "y": 2024, "emp": 287230, "wage": 60640 }, { "y": 2025, "emp": 289960, "wage": 61770 } ], "from": 2017, "to": 2025, "change_pct": 11.4, "comparable_from": 2019, "spans_soc_revision": true }, "pivots": [], "license": "https://cookedindex.com/terms" }