When your 18-wheeler breaks down, every minute of downtime impacts your schedule and income. At Mobile Diesel Truck Repair, we deliver fast, professional, and fully mobile 18-wheeler repair service across the Houston and Dallas–Fort Worth Metroplex. Our certified technicians come directly to your breakdown location — roadside, truck stop, weigh station, job site, or yard — fully equipped to diagnose and repair your tractor-trailer on the spot. 

Whether it’s a blown tire, air brake issue, electrical fault, or derate mode, we get your big rig back on the road quickly and safely. 

 

Call Now for 24/7 18-Wheeler Repair Service: 855-457-1170 

Fast Dispatch • Mobile Roadside Service • No Towing Needed 

18 Wheeler Semi Truck Service and Repair

We provide mobile repair services for all makes and models of 18-wheelers, including: 

  • Freightliner 
  • Kenworth 
  • Peterbilt 
  • Volvo 
  • International 
  • Mack 
  • Western Star 

Our goal is simple: minimize your downtime and get you back on the road fast. 

18 Wheeler Semi Truck Service and Repair

18 Wheeler Semi Truck Service and Repair

Breakdowns rarely happen at the right place or time. Our team is available 24 hours a day, offering mobile repair for: 

  • No-start issues 
  • Air leaks 
  • Locked brakes 
  • Electrical faults 
  • Overheating 
  • Tire blowouts 
  • Trailer connection issues 
  • DEF/DPF/EGR faults 

Whenever your big rig stops moving — we come to you. 

Certified Heavy-Duty Diesel Mechanics

Our technicians specialize in: 

  • Tractor-trailer systems 
  • Heavy-duty diesel engines 
  • ABS & air brake systems 
  • ECM diagnostics 
  • Aftertreatment troubleshooting (DPF, DEF, SCR, EGR) 

We handle both simple and complex breakdowns on-site. 

Advanced Diagnostic Tools

We use OEM-level diagnostic software to quickly identify and repair engine, electrical, and aftertreatment issues. No guessing. Just accurate troubleshooting and fast repairs. 

Honest Pricing & Upfront Estimates

We believe in clear pricing with no hidden fees. You’ll always know the cost before work begins. 

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Complete 18-Wheeler Repair Services

We repair every major system on your tractor-trailer, including: 

Engine Repair & Diagnostics

Common problems we fix include: 

  • Loss of power 
  • Excessive smoke 
  • Turbocharger issues 
  • Fuel system problems 
  • Oil leaks 
  • Overheating 
  • Fault codes 
  • Failed sensors 

We work on all major engines: Cummins, Detroit Diesel, Paccar, Caterpillar, Volvo, Mack, Navistar. 

Transmission & Driveline Repair

We offer: 

  • Clutch replacement 
  • Driveline & U-joint repair 
  • Gear shifting issues 
  • Transmission diagnostics 
  • Fluid service 
  • Flywheel repair 

Air Brake System Repair

We repair: 

  • Air leaks 
  • Brake chambers 
  • Slack adjusters 
  • Hoses & lines 
  • ABS issues 
  • Emergency brake problems 

Your brakes must be flawless — we ensure they are. 

Electrical System Repair

We fix: 

  • Alternators 
  • Starters 
  • Batteries 
  • Wiring issues 
  • Trailer plug problems 
  • Lighting issues 
  • Dash warnings 
  • Sensors & relays 

Electrical problems are one of the top causes of roadside breakdowns — and we fix them fast. 

DEF, DPF & Aftertreatment Repair

We handle: 

  • DPF regeneration 
  • DEF pump & heater replacement 
  • NOx sensor issues 
  • EGR valve problems 
  • Derate mode 
  • SCR system failures 

Tire Repair & Replacement

We offer: 

  • On-site tire repair 
  • Blowout service 
  • New tire installation 
  • Trailer tire replacement 

Perfect for roadside emergencies. 

On-Site Tractor-Trailer Repair – No Tow Needed

Our mobile repair trucks can fix most 18-wheeler issues on location, saving you the hassle and cost of towing. 

We service: 

  • Highways & freeways 
  • Truck stops 
  • Rest areas 
  • Weigh stations 
  • Job sites 
  • Distribution centers 
  • Parking lots 

📞 Need Immediate Roadside Help? Call 855-457-1170 

Fleet Maintenance for 18-Wheelers

We offer customized maintenance programs for: 

  • Owner-operators 
  • Logistics fleets 
  • Regional trucking companies 
  • Long-haul fleets 
  • Hotshot fleets 
  • Local delivery fleets 

Routine services: 

  • DOT inspections 
  • PM service 
  • Engine & aftertreatment service 
  • Electrical checks 
  • Brake inspections 
  • Tire & wheel maintenance 

Prevent breakdowns before they happen. 

Service Areas in Dallas–Fort Worth

We provide mobile semi truck repair throughout the DFW Metroplex, including: 

If you’re in DFW, we’ll come to you. 

Frequently Asked Questions

Do you offer 24/7 mobile 18-wheeler repair service?

Yes. We provide 24/7 mobile 18-wheeler repair and roadside service across the Houston, Dallas–Fort Worth area. If your tractor-trailer breaks down on the highway, at a truck stop, weigh station, yard, or job site, we can dispatch a technician any time — day or night. Our goal is to get your rig back on the road as fast and safely as possible. 

What types of 18-wheelers do you work on?

We service most major class 8 trucks and 18-wheelers, including: 

  • Freightliner 
  • Peterbilt 
  • Kenworth 
  • International 
  • Volvo 
  • Mack 
  • Western Star 

We also work on all major heavy-duty diesel engines: 

  • Cummins 
  • Detroit Diesel 
  • Paccar 
  • Caterpillar 
  • Volvo & Mack engines 
  • Navistar / International 

If you’re not sure whether we can work on your truck, just give us a call and tell us the make, model, and engine. 

What repairs can you do roadside on an 18-wheeler?

Our mobile service trucks are equipped to handle most common 18-wheeler breakdowns on-site, including: 

  • Engine diagnostics & fault code repair 
  • Air brake leaks and brake chamber replacement 
  • No-start issues 
  • Electrical and wiring problems 
  • Battery, alternator & starter issues 
  • Tire blowouts, tire repair and replacement 
  • DEF, DPF & aftertreatment faults 
  • Overheating and coolant leaks 
  • Trailer plug and lighting issues 

In many cases, no tow is needed — we repair your big rig right where it is. 

Do you handle DEF, DPF and derate mode problems?

Yes. We frequently respond to calls where trucks are: 

  • Stuck in derate or limp mode 
  • Showing DEF or DPF warnings 
  • Having repeated regen issues 
  • Throwing aftertreatment fault codes 

We diagnose and repair issues with DPF filters, DEF pumps and heaters, NOx sensors, EGR valves, and related components to get your engine back to full power. 

What areas of Dallas–Fort Worth do you serve?

We provide mobile semi truck repair throughout the DFW Metroplex, including: 

If your truck is down anywhere in or around Dallas–Fort Worth, we’ll come to you. 

How do I request mobile 18-wheeler repair service?

For emergency or same-day service, call 855-457-1170. 

Here’s what happens next: 

  1. You tell us your location and describe the problem. 
  2. We confirm your truck and engine details. 
  3. We dispatch a mobile technician to your breakdown location. 

For non-emergency repairs, DOT inspections, or fleet maintenance, you can also request an appointment through the contact form on our website. We’ll schedule service at a time and place that works best for you. 

Call Now for 24/7 Mobile 18-Wheeler Repair Service

Keep your truck moving — and your load on schedule. 

Call 855-457-1170 

24/7 Mobile Repair • Roadside Service • Fast Dispatch 

Do you need Truck Repair service?

We hope you won’t need it, but we are ready to help.
Call us now