Vehicle Maintenance Records Checklist

Maintenance records do not all use the same retention period, and treating them as one is how gaps get created. The general rule under 49 CFR 396.3(c) is current period plus one year for inspection and repair records. Annual inspection certificates are separate: 14 months from the inspection date, not from the end of the calendar year. Roadside inspection reports run 12 months. The location requirement matters too — records need to be at the principal office or at the maintenance location, not only in a shop's system or in a driver's phone. Carriers that keep maintenance records in a vendor system without a local backup often lose access when they change shops or cancel an account.

Trailers require annual inspections under 49 CFR 396.17 the same as tractors do. The gap that comes up most often is carriers that keep power unit inspection records carefully but track trailers differently — or not at all — because trailers cycle between loads and locations without the same daily visibility. The inspection certificate, the inspection form, and the documentation showing the inspector was qualified need to be on file for trailers just as they are for trucks. If trailers are leased in or borrowed from a shipper's pool, confirm before the audit who is responsible for the record.

The annual inspection has to be performed by someone who actually knows what they are looking at — 49 CFR 396.19 requires documentation showing the inspector can identify defective components and understands the inspection criteria. What counts as documentation varies: a state-issued inspector certification, a manufacturer's training record, or documented relevant experience are all acceptable depending on the state and situation. Most commercial shops can provide a copy of their inspectors' credentials on request. Keep that document with the inspection report — not just stored at the shop — so you can produce it during a review without making a phone call.