Used Semi Truck Buying Checklist
Work through this checklist before buying a used semi truck — VIN, DOT history, inspection, and paperwork.
Last updated: June 2026 · Data sources: NHTSA vPIC (live) and FMCSA public inspection records (periodic refresh).
Quick answer
Before buying a used semi truck: decode the VIN, check its FMCSA DOT roadside inspection history for violations and out-of-service events, inspect brakes/tires/steering/suspension, review the carriers that operated it, ask for maintenance and repair records, get a pre-purchase inspection, and verify title and odometer separately via an NMVTIS provider.
Free FMCSA roadside summary. We accept exact 17-character VINs only and never silently correct a VIN.
Official NHTSA + FMCSA data Free VIN decode Exact-VIN matching No title/odometer claims
The checklist
- Confirm the 17-character VIN matches across door jamb, dash, frame, and title.
- Decode the VIN (make, model, year, GVWR, engine).
- Check FMCSA DOT roadside history for violations and out-of-service events.
- Look for repeated systems (brakes, tires, lights, suspension).
- Review carriers observed operating the VIN.
- Request maintenance records and repair invoices for any cited issues.
- Get a pre-purchase inspection from a qualified mechanic.
- Verify title, liens, and odometer via an NMVTIS provider.
Learn more
Frequently asked questions
- What's the most important check?
- Confirm the VIN, then check its DOT roadside history — it tells you what to verify. Always finish with a physical pre-purchase inspection.
- Does DOT history replace an inspection?
- No. It tells you what to inspect. A qualified mechanic confirms current condition.