As a mobile mechanic, many service calls I attend are preventable and very easy fixes; they cost drivers far more than they should.

I am a licensed Red Seal mechanic and mobile diesel service owner in Toronto, and I’ve seen firsthand how many roadside breakdowns are completely avoidable. As much as I enjoy what I do, emergency mobile service is expensive, and I’d rather help drivers avoid the call in the first place.

Most of my service calls are not catastrophic engine failures. They’re dead batteries, blown fuses, leaking glad-hand seals, frozen airlines, low fluids, or issues that could have been caught during a proper pre-trip inspection. Many owner operators and even fleets lose thousands annually to problems that start small and become expensive simply because they were ignored.

Everything starts with the driver. We, mechanics, notice how equipment is kept, especially the cab. A clean, organized truck usually tells us the driver takes pride in maintenance and pays attention to detail. In many cases, a disorganized truck can also reflect inconsistent maintenance habits. Some mechanics will flat out refuse to work on messy or unmaintained trucks.

Large fleets understand this well, which is why cleanliness and routine inspections are heavily emphasized in professional operations. An added bonus is that a clean, well-maintained truck is often less likely to attract unwanted attention during random DOT or MTO roadside inspections.

Drivers do not need to become licensed mechanics, but every commercial driver should understand the basics of their equipment. Learning to handle basic maintenance items.

Changing air filters, checking batteries, monitoring fluids, and inspecting air systems, actually doing a proper pre-trip inspection, can save significant money and downtime. It also helps prevent drivers from being taken advantage of by dishonest shops that may oversell repairs to someone unfamiliar with their truck.

Drivers today also have more resources than ever before, including instructional videos, manufacturer service information, and AI tools that can help explain basic systems and troubleshooting.

A little preparation goes a huge way in this industry. Some of the most basic tools and cheap supplies can prevent the most expensive and trivial service calls. Every truck should carry a small emergency breakdown kit with a few essentials to save money while on the road:

• Heavy-duty jumper cables
• Spare fuses
• Bulbs
• Multimeter
• $5 test light
• New spare 7-Pin trailer harness
• Air Line Tubing
• Airline de-icer
• Glad-hand seals
• An airline adapter to fill tires
• Engine oil
• Coolant
• ATF
• Brake cleaner
• Flashlights
• Gloves
• Basic cleaning supplies
• Tape
• Zip ties
• Socket set
• Wrench set
• A few screwdrivers
• Pliers set
• A vice grip or two
• Tow / recovery straps
• Extra snacks with a long shelf life
• A high-vis safety vest

That entire setup may cost a couple of hundred dollars at most, but it is far cheaper than a roadside service call. For perspective, my commercial service fee starts at $100 before labor, and labor is billed at $180 per hour with no partial hour billing.

You may build your own kit to your liking but this list are just the basics I would recommend that cover about half of my service calls.

Another issue drivers often overlook is their own health. Many push their e-logbooks to the limit, skip meals, and sacrifice sleep to maximize miles. In my opinion, the most important tool in trucking is not in the toolbox or truck, it’s the driver. Fatigue leads to poor decisions, missed inspections, preventable damage, and accidents.

A rested, well-fed, organized driver will almost always operate more efficiently than an exhausted one. I always keep a box of granola bars to hand out to drivers on service calls — fuel keeps the truck moving, and food does the same for the driver.

At the end of the day, preventive maintenance and a small roadside breakdown kit cost far less than emergency repairs. The best investment a driver can make is knowledge. Learn your equipment, pay attention to warning signs, keep your truck clean, and handle small problems before they become expensive ones.