Maintenance Records: What Carriers Should Keep and Why

Maintaining commercial equipment and maintaining documentation about that equipment are connected—but they are not the same thing. Good records help carriers document compliance, plan maintenance, and understand what their equipment is costing the business.

You changed the tires. The brakes were serviced. The truck received preventive maintenance. A damaged component was replaced. The annual inspection was completed.

But there is another question every carrier should be able to answer: Where is the record?

A carrier can spend thousands of dollars maintaining a truck and still create compliance problems if required records are incomplete, inaccurate, unavailable, or poorly organized. For owner-operators and small fleets, maintenance records should not be treated as paperwork that gets stuffed into a glove box. They are part of operating the business.

Federal Maintenance Record Requirements

Under 49 CFR §396.3, motor carriers must systematically inspect, repair, and maintain vehicles subject to their control. The regulation also contains specific recordkeeping requirements for vehicles a carrier controls for 30 consecutive days or more.

FMCSA enforcement materials identify failing to keep the minimum inspection and vehicle-maintenance records required by §396.3(b) as a critical violation.

What Information Should the Vehicle Record Contain?

For vehicles subject to the §396.3(b) recordkeeping requirements, carriers should maintain records identifying the vehicle. That includes information such as the company number, if applicable; make; serial number; year; and tire size. If the carrier does not own the vehicle, the record must also identify the party furnishing the vehicle.

The purpose is straightforward: a maintenance record needs to be connected to the actual piece of equipment it belongs to.

For a small carrier with one truck, that may seem obvious. As a fleet grows—or trailers, leased equipment, and replacement vehicles enter the operation—clear identification becomes increasingly important.

Record What Was Actually Done

The required records also include information showing the date and nature of inspections and maintenance operations performed. That creates a history for the vehicle.

A well-maintained history can help a carrier recognize repeated repairs, recurring problems, and maintenance patterns before they become harder to manage.

Track What Is Coming Due

Maintenance records should not only tell you about the past. For vehicles subject to §396.3(b), carriers must also have a means of indicating the nature and due date of the various inspection and maintenance operations that are to be performed.

That makes the maintenance file useful as a planning system. Truck 1 may need one service while Truck 2 approaches another, and a trailer may have a different inspection date. An organized system helps prevent those dates from being lost.

Keep Supporting Documentation Organized

A practical carrier maintenance file may contain more than the minimum information required by one federal provision. Depending on the operation and document involved, carriers may find it useful to organize inspection reports, repair orders, maintenance invoices, receipts, parts and service records, tire service records, preventive-maintenance history, periodic inspection documentation, and records of reported defects and corrective action.

How Long Do §396.3 Maintenance Records Need to Be Kept?

For maintenance records required under §396.3(b), FMCSA states that records must generally be retained where the vehicle is housed or maintained for one year.

If the vehicle leaves the carrier's control, the required records must generally be retained for six months after the vehicle leaves the motor carrier's control.

That means selling a truck does not necessarily mean the maintenance file can immediately be discarded.

What If the Truck Is Not Maintained at One Location?

This is especially relevant for smaller carriers that use outside shops or do not have a dedicated maintenance facility.

FMCSA guidance says that when a vehicle is not housed or maintained at a single location, the motor carrier may retain the maintenance records at a location of its choice. The carrier remains responsible for making sure those records are current and factual.

FMCSA guidance further states that, upon request, the records must be made available to FMCSA within a reasonable period—identified in the guidance as two working days.

This is why relying entirely on the idea that “the repair shop probably has it” is not a strong recordkeeping system. The carrier remains responsible for its required records.

Annual Inspection Records Have Their Own Retention Rule

Do not mix every maintenance-related document into the same retention timeline.

Under §396.17, commercial vehicles subject to the periodic inspection requirement must generally receive that inspection at least once every 12 months. Each segment of a combination vehicle requires the periodic inspection.

FMCSA states that the original or a copy of the periodic inspection report must be retained by the motor carrier for 14 months from the report date.

Roadside Inspection Reports Are Different Too

A roadside inspection report is another maintenance-related document with its own requirements. FMCSA states that when a driver receives a roadside inspection report, the driver must deliver it to the motor carrier.

The carrier must examine the report and ensure violations or defects requiring correction are addressed. Under Part 396, the carrier must certify the corrective action as required and return the completed report to the issuing agency within the applicable timeframe. A copy of the inspection report must generally be retained by the motor carrier for 12 months from the date of inspection.

This is another reason a carrier should not create one generic rule such as “keep every maintenance document for one year.” Different records can have different requirements.

Paper or Digital?

The most important thing is not whether the carrier owns the world's fanciest filing cabinet. It is whether required information is organized, accurate, current, retrievable, and retained appropriately.

As the operation grows, the filing system grows with it instead of becoming a pile of unrelated invoices.

Maintenance Records Are Business Records Too

Compliance is not the only reason maintenance history matters. Suppose one truck repeatedly needs repairs to the same system, maintenance costs rise substantially over a year, or an owner-operator is trying to decide whether to keep repairing an older truck or replace it.

Without organized records, those decisions can become based on memory. With records, the carrier can look at the history: how much was spent, what keeps failing, how frequently the truck goes into the shop, and how much downtime is associated with it.

The DQ Maintenance Records Check

Good Maintenance Needs Good Records

A carrier should not have to reconstruct the history of a truck from memory, bank statements, and a pile of receipts.

The maintenance record should tell the story: what happened, what was repaired, when it happened, and what is due next. When required, it should also provide documentation showing how the carrier maintained its equipment.

For an owner-operator, that creates organization. For a growing fleet, it creates a system.