Mobile Fleet Repair & Diesel Services

Keeping Your Equipment Working. Keeping Your Business Moving.

At M.A.G. Fleet Services, we provide dependable mobile diesel repair, fleet maintenance, diagnostics, welding, and roadside service for commercial trucks, trailers, construction equipment, and fleet vehicles.

We bring the repair service directly to your yard, jobsite, or roadside location—helping reduce downtime and get your equipment back to work as quickly as possible.

Grace in our Purpose. Truth in our Work.

Our Services

Mobile Diesel Repair

When your truck or equipment needs repair, we come to you.

Our mobile diesel repair services include:

  • Engine diagnostics and repair

  • Cooling system repairs

  • Fuel system diagnostics

  • Oil and fluid leak repairs

  • Belt and hose replacement

  • Electrical diagnostics and repair

  • Starting and charging system repairs

  • Air system diagnostics

  • Minor engine component replacement

  • No-start and hard-start diagnostics

Whether your equipment is at a jobsite, fleet yard, or stranded on the road, M.A.G. Fleet Services provides professional mobile support.

Preventive Maintenance & Fleet Service

Preventive maintenance helps reduce unexpected breakdowns and keeps your fleet operating efficiently.

Services include:

  • Engine oil and filter changes

  • Fuel filter replacement

  • Air filter replacement

  • Chassis lubrication

  • Fluid inspections

  • Belt and hose inspections

  • Battery and charging-system checks

  • Brake inspections

  • Steering and suspension inspections

  • Tire and wheel inspections

  • Air system inspections

  • General vehicle condition inspections

Maintenance programs can be tailored to individual trucks or entire fleets.

Computer Diagnostics

Modern diesel trucks depend heavily on electronic controls and emissions systems.

We provide diagnostic services for:

  • Check engine lights

  • Active and inactive fault codes

  • Engine performance concerns

  • Aftertreatment faults

  • DEF system faults

  • DPF system concerns

  • EGR system faults

  • Sensor and wiring problems

  • Electrical faults

  • Communication issues

  • No-start conditions

Our goal is to properly diagnose the cause of the problem before replacing unnecessary parts.

Brake & Air System Repair

Commercial vehicle brake systems require proper inspection and maintenance to keep drivers and equipment safe.

We service:

  • Air brake systems

  • Brake chambers

  • Slack adjusters

  • Brake shoes

  • Brake drums

  • Air lines and fittings

  • Foot brake valves

  • Quick-release valves

  • Air leaks

  • Governors

  • Air dryers

  • Trailer brake components

We can diagnose air leaks, brake performance concerns, and other pneumatic system problems directly at your location.

Suspension & Steering Repair

Loose or worn steering and suspension components can cause poor handling, abnormal tire wear, and unsafe operating conditions.

Services include:

  • Drag links

  • Tie rods

  • Shock absorbers

  • Air bags

  • Suspension components

  • U-bolt inspections

  • Steering components

  • Wheel-end inspections

  • Front-end inspections

  • Ride and vibration diagnostics

DPF, DEF & Emissions System Diagnostics

Aftertreatment problems can quickly result in reduced engine power, warning lights, or vehicle derates.

We diagnose and service:

  • Diesel Particulate Filter systems

  • Diesel Exhaust Fluid systems

  • Selective Catalytic Reduction systems

  • EGR systems

  • NOx sensors

  • Exhaust temperature sensors

  • Differential pressure sensors

  • DEF dosing components

  • Regen-related problems

  • Aftertreatment fault codes

We focus on identifying the underlying cause of emissions-system failures instead of simply clearing fault codes.

Electrical Diagnostics & Repair

Electrical problems can cause intermittent failures that are difficult to diagnose.

Our electrical services include:

  • Battery testing

  • Charging-system diagnostics

  • Starter diagnostics

  • Wiring repairs

  • Connector repairs

  • Ground circuit testing

  • Lighting repairs

  • Sensor circuit diagnostics

  • Fuse and relay diagnostics

  • Electrical short and open-circuit diagnosis

Trailer Repair

We provide mobile service for commercial trailers, including:

  • Trailer brake repair

  • Brake shoe replacement

  • Brake drum replacement

  • Slack adjuster replacement

  • Air leak repair

  • Air line and fitting replacement

  • Lighting and electrical repairs

  • Suspension inspection

  • Wheel-end inspection

  • Preventive maintenance

Mobile Welding & Fabrication

M.A.G. Fleet Services also provides mobile welding and repair services for trucks, trailers, equipment, and fleet applications.

Services may include:

  • Equipment repairs

  • Trailer repairs

  • Bracket repairs

  • Structural repair

  • Minor fabrication

  • Broken mounting-point repairs

  • On-site welding

Repairs are evaluated based on the condition of the component and whether a safe repair can be performed.

A/C Service & Repair

Keep your operators comfortable with professional mobile air-conditioning diagnostics and repair.

Services include:

  • A/C performance testing

  • Refrigerant system diagnostics

  • Leak diagnosis

  • Compressor diagnosis

  • Condenser replacement

  • Electrical diagnosis

  • Blower motor and wiring repair

  • Hose and fitting inspection

  • Refrigerant recovery and service

Fleet Maintenance Support

Businesses depend on their equipment to stay productive.

M.A.G. Fleet Services works with:

  • Trucking companies

  • Construction companies

  • Transportation fleets

  • Owner-operators

  • Delivery fleets

  • Contractors

  • Heavy-equipment operators

  • Commercial vehicle owners

Whether you operate one truck or an entire fleet, we can help establish a dependable maintenance and repair relationship.