Guide to fleet maintenance & vehicle health
Fleet maintenance helps support vehicle safety, reliability and readiness for the road. But an effective maintenance strategy goes beyond responding to a warning light.
Instead of addressing problems after they’ve already disrupted operations, a more proactive approach uses vehicle data to help fleets identify maintenance needs earlier, plan service around how vehicles are being used and reduce unexpected downtime.
In this guide, we’ll explore how the right vehicle data and the technology to connect it can make it easier to know what needs attention, when to act and where to focus your resources.
1. Building a data-driven proactive maintenance schedule
Proactive maintenance works best when it reflects how vehicles are actually being used. A vehicle that spends hours idling at job sites may have very different service needs than one covering hundreds of highway miles—even if they’re the same age.
Fleet management software uses connected vehicle technology to collect and transmit data such as mileage, engine hours and vehicle activity. By incorporating that data into a fleet proactive maintenance schedule, fleet managers can move beyond calendar dates alone and plan service around how each vehicle operates.
According to the Fleet Technology Trends Report survey, fleet professionals using GPS fleet tracking reported seeing an average 15% decrease in maintenance costs.”
Look beyond the calendar
Traditional fleet maintenance schedules often rely on fixed intervals, such as a certain number of months or miles. But neither measure tells the whole story for every vehicle.
Along with manufacturer-recommended maintenance, combining multiple triggers can better indicate when service may be due:
| Maintenance trigger | What it tells you | When it can help |
| Time | How long it’s been since the last service | Tracking recurring maintenance |
| Mileage | How far the vehicle has traveled | Scheduling service tied to road use |
| Engine hours | How long the engine has been running | Accounting for vehicles with significant idle or operating time |
Make maintenance history easier to use
Knowing when service is due is only part of an effective fleet maintenance plan. You also need to know what’s already been done.
When maintenance information lives across paper files, spreadsheets and other records, it can be harder to get a complete picture of a vehicle’s history. A centralized digital record can bring completed service, repair history, costs and upcoming needs together in one place.
Turn maintenance milestones into action
A well-planned schedule only works if the service happens. Automated reminders make those milestones harder to miss. Alerts and reminders can help teams stay ahead of upcoming maintenance instead of relying on someone to continually monitor service milestones.
Together, usage data, centralized records and automated alerts can create a fleet proactive maintenance program that’s more responsive to how and when vehicles need service.
4 ways telematics can help improve fleet maintenance
See how telematics can help automate service schedules, track repairs and anticipate maintenance needs.
2. Streamlining inspections with electronic DVIRs
Proactive schedules help you stay ahead of expected maintenance. But not every issue happens on schedule. Daily vehicle inspections can help fill that gap by surfacing problems as they develop.
An electronic driver vehicle inspection report (eDVIR) allows drivers to complete inspections from a mobile device and digitally record issues as they find them. Unlike paper forms that can be misplaced, incomplete or slow to reach the right person, electronic DVIRs can create a more direct connection between drivers, vehicles and maintenance teams.
Shorten the path from "issue found" to "issue fixed"
With an electronic DVIR app, drivers can document defects with notes and photos, while failed inspection items can be surfaced to fleet managers and maintenance teams for follow-up. That turns the inspection from a recordkeeping exercise into an early warning system—giving teams an opportunity to address developing issues before they contribute to downtime. Once a defect is corrected, the repair can also be documented and verified during the next inspection cycle.
Fisher estimated the Verizon Connect customer was on pace to save more than 100 hours in a year after moving away from paper-based DVIRs.
3. Monitoring vehicle health with diagnostic data
Vehicle health monitoring lets fleet managers track vehicle condition and usage without waiting for a trip to the shop. Remote diagnostic data can then point to which vehicles may need attention first—and how quickly.
Know what a DTC is really telling you
Modern vehicles use sensors to monitor different systems and generate a diagnostic trouble code (DTC) when sensor data exceeds a predefined operational threshold. Depending on the vehicle, codes can point to issues involving the powertrain, electrical system, emissions, transmission and more.
That makes DTCs valuable—but they’re important to understand in context. A DTC means an issue has already crossed a defined threshold; it isn’t a prediction that something might fail.
Depending on the vehicle’s year, make, and model, telematics allows fleet managers to access DTC information remotely instead of waiting for driver reports or the vehicle's return—giving maintenance teams the context they need to plan their next move.
Prioritize what needs attention
Not every vehicle alert calls for the same response. One may require immediate attention, while another may be appropriate to address during the vehicle’s next scheduled service.
Through integrations with third-party maintenance platforms, fleet systems can use DTC data and fault severity to streamline maintenance triage—helping teams focus shop time where it matters most.
Connect the signals
Each signal adds a distinct layer of insight. A preventive schedule establishes when service is due, while an inspection captures what a driver can observe. DTCs highlight vehicle-reported faults, and in cases when supported by the year, make, and model, remotely captured odometer data keeps mileage-based maintenance schedules current without manual entry—helping teams proactively track upcoming service milestones.
Take a closer look at DTCs
Learn what diagnostic trouble codes mean and how to use them to better understand vehicle health.
4. Managing tires and seasonal maintenance
Not every maintenance need fits neatly into a standard schedule. Tires, temperature and changing road conditions can create added wear, so inspections and maintenance may need to shift with the season.
Keep tire health on your radar
Pressure, tread and wear patterns provide early clues about tire condition and other vehicle issues. Tire problems accounted for 21.4% of all vehicle out-of-service violations during the Commercial Vehicle Safety Alliance’s 2025 International Roadcheck, according to CVSA data.
Effective tire maintenance isn’t a one-size-fits-all approach. Steer, drive and trailer tires experience different loads and wear patterns, making tire position another important consideration when deciding what to inspect and when to act.
| What to watch | What it can tell you |
| Tire pressure | Whether underinflation could be contributing to wear, handling or fuel-efficiency issues |
| Tread and wear patterns | Whether alignment, suspension or other mechanical issues may need attention |
| Axle position | How different loads and operating demands may be affecting steer, drive and trailer tires |
Adjust maintenance as conditions change
The same fleet can have different maintenance needs from one season to the next. Cold weather, for example, can put additional strain on batteries, fluids and tires, while snow, ice, road salt and potholes can accelerate vehicle wear.
Even tire pressure changes with the weather: tires can lose about 1 PSI for every 10-degree drop in temperature.
Before seasonal conditions arrive, consider whether tires, batteries, fluids, brakes and maintenance intervals need additional attention. Vehicle data can also reveal recurring seasonal patterns that may warrant a change in your proactive maintenance approach.
5. Protecting vehicle lifecycle and resale value
Proactive maintenance isn’t only about keeping vehicles on the road today. Over time, maintenance and repair trends can also help fleet managers decide when it makes sense to keep, replace or sell a vehicle.
Know when maintenance costs are telling you something
As vehicles age, maintenance and repair costs can start to climb. Tracking those costs over time can reveal when a vehicle is becoming more expensive to keep.
Instead of relying on age or mileage alone, look at maintenance and repair costs, repair frequency, downtime, usage and remaining vehicle value together.
Looking at those trends together can signal when continuing to repair a vehicle may no longer make financial sense—and when replacement may be the better investment.
Make maintenance part of the lifecycle decision
The question isn’t simply "How old is this vehicle?" It’s "Is this vehicle still delivering enough value to justify what we’re putting into it?"
Maintenance data adds context to that decision by showing how a vehicle is performing over time—not just how old it is or how many miles it has traveled. A consistent maintenance history can also document how the vehicle was cared for, providing a clearer record of completed service and repairs when it’s time to sell.
6. Conclusion: Put proactive maintenance into practice
Improving fleet maintenance doesn’t require changing everything at once. Start by understanding how vehicles are being used, what condition they’re in and where service needs are beginning to emerge.
From there, focus on connecting the information you already have—from maintenance schedules and inspections to diagnostic data—so your team can spot issues sooner, prioritize what matters and make more informed decisions.
Verizon Connect brings vehicle data and maintenance workflows together, making it easier to track service needs and act on vehicle health information.
Ready to get ahead of fleet maintenance?
See how Verizon Connect can help you put vehicle data to work across your maintenance program.
Sources
Fleet Technology Trends Report survey conducted among fleet industry subscribers and professionals across multiple sectors and telematics providers. Statistics reflect responses from surveyed participants utilizing asset tracking technology