Diagnose, adjust, repair, or overhaul buses and trucks, or maintain and repair any type of diesel engines. Includes mechanics working primarily with automobile or marine diesel engines.
U.S. Workers
287,230
Median Salary
$60,640
10-Year Growth
+2.4%
Annual Openings
26,500
Typical entry: High school diploma or equivalent
25 of 25 tasks have some AI capability
Exposure Trend
This score reflects estimated AI technical capability for tasks in this occupation. It does not predict employment changes, and it does not account for company-specific constraints, regulation, or adoption barriers.
Inspect and verify dimensions and clearances of parts to ensure conformance to factory specifications.
AI: Fully automatable - Automated metrology, vision, and sensor systems driven by AI can reliably inspect and verify dimensions and clearances to factory specs where measurement equipment is available.
Follow green operational practices involving conservation of water or energy or reduction of solid waste.
AI: Fully automatable - AI-driven monitoring, control systems, and workflow enforcement can fully implement many water/energy conservation and waste-reduction practices in operational contexts as of 2025.
Measure vehicle emissions to determine whether they are within acceptable limits.
AI: Fully automatable - With proper sensors and test equipment, AI systems can fully measure vehicle emissions and determine compliance with regulatory limits.
Inspect brake systems, steering mechanisms, wheel bearings, and other important parts to ensure that they are in proper operating condition.
AI: Partial - AI and diagnostic tools can detect many faults and flag components needing attention, yet comprehensive physical inspection of brakes, steering and bearings still relies on human judgment and hands‑on checks in most real‑world settings.
Use handtools, such as screwdrivers, pliers, wrenches, pressure gauges, or precision instruments, as well as power tools, such as pneumatic wrenches, lathes, welding equipment, or jacks and hoists.
AI: Partial - AI can instruct, program robots and recommend tool use and torque specs, but broad, dexterous use of handtools and varied power tools across unpredictable repair contexts is not fully automated by 2025.
Adjust and reline brakes, align wheels, tighten bolts and screws, and reassemble equipment.
AI: Partial - AI can guide brake adjustment, wheel alignment procedures and provide automated alignment machines, but many reline, reassembly and nuanced torque/fit tasks remain manual and require skilled technicians.
Examine and adjust protective guards, loose bolts, and specified safety devices.
AI: Partial - AI can detect safety issues and recommend or guide adjustments via vision and diagnostics, but physically examining and tightening/loosening bolts typically requires a human or specialized robotics not widely available by 2025.
Perform routine maintenance such as changing oil, checking batteries, and lubricating equipment and machinery.
AI: Partial - AI can plan, schedule, and guide routine maintenance and some shop automation exists, but the hands‑on tasks of changing oil and lubricating heavy equipment remain primarily manual in most settings.
Test drive trucks and buses to diagnose malfunctions or to ensure that they are working properly.
AI: Partial - AI and telematics can simulate and diagnose many driving faults remotely and limited autonomous test drives exist, but comprehensive test-driving of varied trucks and buses still usually requires a human driver or controlled environments.
Raise trucks, buses, and heavy parts or equipment using hydraulic jacks or hoists.
AI: Partial - Automation can control hoists and jacks in constrained shops, but positioning and safely raising diverse heavy vehicles and parts still commonly depends on trained human operators in 2025.
Attach test instruments to equipment, and read dials and gauges to diagnose malfunctions.
AI: Partial - AI can read and interpret instrument outputs and vision systems can read dials, but attaching test instruments to equipment is a physical task that typically requires human intervention.
Rebuild gas or diesel engines.
AI: Partial - AI can provide disassembly/rebuild procedures, diagnostics, and tooling guidance, but the complex manual dexterity and variability involved in fully rebuilding engines remain beyond general AI/robotic autonomy by 2025.
Inspect, test, and listen to defective equipment to diagnose malfunctions, using test instruments such as handheld computers, motor analyzers, chassis charts, or pressure gauges.
AI: Partial - AI can analyze sensor data, acoustic signatures, and instrument outputs to diagnose faults, but collecting some test measurements and hands‑on inspection steps often still require human technicians.
Recondition and replace parts, pistons, bearings, gears, and valves.
AI: Partial - AI can plan and guide part reconditioning and replacements and some automated machining exists, but the manual remanufacturing and fitting of components like pistons and bearings remains largely human-led.
Rewire ignition systems, lights, and instrument panels.
AI: Partial - AI can generate wiring diagrams, troubleshoot electrical faults, and guide technicians, but the physical rewiring of ignition systems, lights, and panels is still predominantly performed by humans in 2025.
Specialize in repairing and maintaining parts of the engine, such as fuel injection systems.
AI: Partial - AI can diagnose fuel injection issues and provide procedural guidance, but cannot reliably perform the intricate physical repairs and on-vehicle manipulations across diverse real-world conditions as of 2025.
Align front ends and suspension systems.
AI: Partial - Alignment machines and software assist the process and automate measurements, but the physical adjustments and final checks typically still require human technicians or specialized robotics not widely deployed.
Adjust or repair computer controlled exhaust emissions devices.
AI: Partial - AI can diagnose and recalibrate computer-controlled emissions systems and assist with software adjustments, but physical repairs or component replacements still require human technicians.
Inspect, repair, and maintain automotive and mechanical equipment and machinery, such as pumps and compressors.
AI: Partial - AI can inspect, monitor, and diagnose pumps and compressors and plan maintenance, but hands-on repair and complex mechanical disassembly remain largely manual tasks.
Install or repair accessories.
AI: Partial - Installing or repairing accessories is highly variable; AI can provide instructions and control some tooling, but cannot universally perform the diverse manual installations autonomously.
Disassemble and overhaul internal combustion engines, pumps, generators, transmissions, clutches, and differential units.
AI: Partial - Complete disassembly and overhaul of engines, transmissions, and similar components require dexterous manipulation, complex judgment, and specialized shop tooling that general-purpose AI/robotics cannot fully replicate yet.
Diagnose and repair vehicle heating and cooling systems.
AI: Partial - AI can accurately diagnose heating and cooling system faults and recommend repairs, but many repair tasks still demand manual intervention, inspection, and parts replacement.
Repair or adjust seats, doors, or windows.
AI: Partial - Minor adjustments can be guided or semi-automated, but repairing or adjusting seats, doors, and windows typically requires manual dexterity and on-site work beyond current general AI/robot capabilities.
Maintain or repair vehicles with alternative fuel systems, including biodiesel, hybrid, or compressed natural gas vehicles.
AI: Partial - AI can diagnose and provide step‑by‑step procedures, service manuals, and parts guidance for alternative fuel systems, but physical repair, certification, and safety-critical hands‑on work still require humans in 2025.
Operate valve-grinding machines to grind and reset valves.
AI: Partial - Valve‑grinding can be assisted or partially automated by dedicated CNC or servo systems and AI supervision, but setup, fixturing, and quality verification typically need human operators.