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Mobile automotive & diesel service

Service that meets you where the work is.

Mobile diagnostics, maintenance, and repair for automotive and diesel vehicles, trucks, trailers, and equipment throughout Fort Smith and the Greater River Valley area.

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Field-ready mobile serviceTest-first diagnostics24-hour call availability
Horizon Mechanical mobile service truck on a mountain road at sunset

Fort Smith based Western Arkansas & Eastern Oklahoma

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Capabilities

Real help, where the machine sits.

From a no-start in the driveway to a work truck down on site, Horizon brings practical diagnostic and repair capability directly to the problem.

01

Mobile diagnostics

Pinpoint no-starts, warning lights, derates, performance issues, and intermittent faults with a test-first approach.

  • Diesel
  • Gas
  • Electrical
02

On-site repair

Field repairs for batteries, charging and starting systems, belts, hoses, cooling, fuel delivery, air leaks, and common breakdowns.

  • Trucks
  • Trailers
  • Equipment
03

Preventive service

Mobile oil and filter service, inspections, fluid checks, and practical maintenance that helps keep work-ready equipment moving.

  • Fleet
  • PM service
  • Inspections
04

A/C service

Mobile R-134a system diagnosis and service for light-duty vehicles, trucks, and supported equipment.

  • ASE 609
  • R-134a
  • Climate control

Built for efficient field service. We handle repairs that can be completed safely from a mobile service truck. If a major engine, transmission, or structural repair belongs in a shop, we’ll say so plainly and help point you in the right direction.

The Horizon standard

Diagnose first.
Repair what matters.

No guessing, no parts cannon, and no inflated promises. You get a clear assessment, practical options, and work that fits the situation.

Built by diesel mechanics.
Built for people who depend on their equipment.
  1. 01

    Tell us what’s down

    Send the location, unit information, symptoms, and any active fault codes.

  2. 02

    We diagnose on site

    We verify the failure and explain the best repair path before unnecessary parts get installed.

  3. 03

    Get back to work

    We complete field-capable repairs safely and tell you plainly when a shop is the smarter move.

Service area

Based in Fort Smith.
Ready for the River Valley.

Mobile service throughout the Fort Smith metro and surrounding communities, with longer-distance and cross-state work considered by availability.

Fort SmithVan BurenGreenwoodBarlingAlmaLavacaRolandMuldrow

Best fit

Downtime that needs an answer—without a tow bill.

  • ✓ Work trucks & light-duty diesels
  • ✓ Medium-duty trucks & trailers
  • ✓ Construction & agricultural equipment
  • ✓ Fleet maintenance and inspections
  • ✓ Automotive diagnostics and repair

Need service?

Tell us what’s down.
We’ll take it from there.

For the fastest response, include your location, vehicle or equipment type, symptoms, and any fault codes or warning lights.