24/7 Semi Truck Repair & Diagnostics
24/7 Mobile Semi Truck Repair & Diagnostics
When your semi breaks down, every minute of downtime costs you money. Rapid Truck Repair dispatches marked service trucks and experienced diesel technicians directly to your location — on the shoulder, at a truck stop, at a job site or at your yard — 24 hours a day, 7 days a week, holidays included.
100+
Yrs Combined Experience
24/7/365
Dispatch
99%
Back on the Road Without a Tow
100 mi
Radius per Location
We Bring the Shop to Your Semi
Every call starts with a real diagnosis. We connect a diagnostic computer, read the fault codes, check the related sensors, wiring and components, and fix the root cause. About 99% of the drivers we're called out to get back on the road without a tow.
Diagnostics included: Every mobile call includes computer diagnostics with manufacturer-level software, so we fix the actual failure — not just clear the code.
Mobile Semi Truck Repairs We Handle On-Site
Our most common roadside calls, and the work our technicians complete right where you are:
Air Leaks & Air Brake Repair
Air leaks, brake chambers, slack adjusters, valves and air lines — repaired and checked against DOT out-of-service criteria.
Radiators & Cooling Systems
Radiators, hoses, water pumps and coolant leaks fixed before an overheat turns into engine damage.
DEF, DPF & Derate Repair
DEF and aftertreatment faults diagnosed, forced regens performed and derates cleared once the cause is fixed.
Electrical, Starting & Charging
Jump starts, batteries, alternators, starters, wiring faults and lighting repairs.
Fuel System Repair
Fuel delivery problems, filters and prime loss — plus fuel delivery and lockout help when you need it.
Trailer & Reefer Repair
Trailer lights, ABS, brakes, air lines and landing gear, plus reefer service at most locations.
Why Drivers & Fleets Call Rapid Truck Repair
Typical 30–60 Minute ETA
Dispatch uses GPS to send the closest available technician and keeps you updated by text, email or phone. ETAs are estimates and depend on your location and road conditions.
Marked, Equipped Service Trucks
Diagnostic computers, air compressors, heavy-duty tools and common parts ride along on every call.
Approval Before Work Starts
We explain the diagnosis and get the driver's or fleet manager's OK before any repair begins.
Customer Reviews
What Drivers & Fleets Say
“We use Rapid Truck Repair regularly for road calls, and I honestly don't know what we'd do without them sometimes. They've saved us more headaches than I can count and have proven time and time again that they're people we can count on. They do great work, they're honest, and they genuinely care about taking care of their customers. A huge shoutout to Macie! She's always incredibly helpful, easy to communicate with, and willing to go the extra mile.”
“I've been in the trucking industry for many years, and this is by far the best truck service I've ever received. They were quick to respond and handled everything efficiently. On top of that, their pricing was extremely reasonable which is a huge relief when you're in a bind. I'm definitely sticking with them for any future truck service needs. Highly recommend!”
“I've had Rapid Truck Repair help me out a couple of times during the night with our semi-trucks, and they've always been on time. We broke down in Weed, CA and they went out of their way next day to make sure we had the right parts to get our truck fixed, which was super important for keeping our deliveries on schedule. Really appreciate their quick and reliable service.”
“My EGR pipe completely cracked off on my T680 with an X15 engine. I was in Yreka, California, and it was the weekend. They came out, removed my parts, went to the Kenworth dealer, picked up all the original hoses and clamps, completed the repairs, and got me home. Can't thank them enough!”
Mobile Semi Truck Repair Service Areas
Available 24/7 from our service hubs and the communities around them:
FAQ
Mobile Semi Truck Repair FAQs
How fast can a mobile semi truck mechanic get to me?
Our typical ETA is 30–60 minutes after your call, depending on your location and the closest available technician. Dispatch uses GPS and mapping tools to give you an accurate ETA and keeps you updated.
What semi truck repairs can be done on the roadside?
Most breakdowns — tires, radiators and cooling systems, air leaks, DEF and emissions faults, derates, electrical and starting problems, fuel system issues and trailer repairs — are fixed on-site. If a truck truly can't be repaired roadside, we tell the driver and fleet manager right away and help plan the next step, including a tow.
What should I have ready when I call?
Your exact location (address, highway and mile marker, or GPS pin), truck and trailer make, model and unit number, the symptoms or fault codes you're seeing, your name and phone number, and whether the truck is in an unsafe spot.
Do you repair trailers and reefers?
Yes. We repair trailer lights, ABS, brakes, air lines and landing gear at all locations, and service reefer units at most locations. Note that we don't offer welding or fabrication.
Which truck makes do you work on?
All major heavy-duty makes and engines, including Freightliner, Peterbilt, Kenworth, Volvo, Mack and International with Cummins, Detroit, PACCAR, Volvo, Mack and Navistar engines.
More Semi Truck Services
Tire Repair & Rim Replacement
Blowouts, flats and damaged rims replaced — steer, drive and trailer positions, roadside or at your yard.
Learn moreOnsite & Fleet Repair
We come to your yard or terminal to repair, maintain and inspect multiple trucks — with negotiated fleet rates.
Learn moreSemi Truck Diagnostics
Manufacturer-level diagnostics, derate and limp-mode repair and forced DPF regens — roadside or at your yard.
Learn moreHeavy Duty Semi Truck Repair
Engine, brake, cooling, electrical and suspension repairs plus preventive maintenance for Class 8 trucks and trailers.
Learn moreDOT & BIT Inspections
Annual DOT inspections at every location and California 90-day BIT inspections — at your yard, with sticker and report.
Learn moreSmog & CARB Testing (CA)
California only: Clean Truck Check smog testing plus emissions diagnostics and repair to keep your registration clear.
Learn moreBroken Down? Get a Mobile Semi Truck Mechanic
Tell dispatch where you are and what's happening — we'll send the closest available technician.