24/7 Mobile Semi-Truck & Trailer Repair in Bellingham & Ferndale
Broke down on I-5? We come to you.
24/7 mobile semi-truck, trailer and heavy-duty diesel repair in Bellingham, Ferndale and Whatcom County. We bring roadside diagnostics, brake and air system repair, and emergency service to your truck. Serving the northern I-5 corridor, with extended coverage toward Seattle, Tacoma and Portland.
Based Near Bellingham & Ferndale. Serving the I-5 Corridor.
Our primary coverage is throughout Whatcom and Skagit counties, including Bellingham, Ferndale, Blaine, Lynden, Burlington and Mount Vernon. Extended mobile roadside service is available south along I-5 through Seattle, Tacoma, Vancouver and Portland.
On the shoulder between exits? We dispatch to mile markers, not just cities — including breakdowns around I-5 Exit 258 / Bakerview in Bellingham.
Heavy-Duty Repair, Wherever Your Truck Is Sitting
We bring the tools, the parts, and the experience to you — no towing, no waiting in a shop line, less downtime.
Roadside Breakdown Response
Breakdowns, no-start and electrical diagnostics, jump starts, and emergency repairs on the shoulder — day or night, anywhere on I-5.
Brake System Service
Chambers, shoes, drums, slack adjusters, and full air brake diagnostics and repair.
Air Leaks & Air Dryers
Leak-down testing, airline and fitting repair, air dryer service and replacement.
Diesel Diagnostics & Repair
Full mobile diagnostics with dealer-level tools — fault codes, DEF/SCR/DPF and engine derate issues diagnosed and fixed right the first time.
Engine Cooling System
Radiators, water pumps, coolant hoses, thermostats, and leak repairs — we keep your engine running cool.
Steering & Suspension
Steering components, shocks, air-ride and suspension repairs — inspected and fixed on-site to keep the truck tracking straight.
Trailer Problems
Axles, lights, brakes, reefer units — if it's on the trailer, we come fix it on-site.
Oil, Fuel & Filter Service
Oil pans and gasket replacement, fuel system work, and filter changes done on-site at your yard or dock.
Inspections
Inspections that keep your trucks compliant, reliable, and ready for work every day.
Parts Sourcing & Replacement
Rapid sourcing of OEM and aftermarket parts, professionally installed — minimal wait time.
When a Truck Stops, Money Stops.
Our business was built for drivers and fleet managers who can't afford downtime. We respond fast, work efficiently, and fix it correctly the first time.
Rapid Response, Anytime
Ready to dispatch around the clock, minimizing your downtime with prompt roadside assistance.
- 24/7 emergency dispatch
- Fast arrival for roadside issues
- Covers Blaine to Portland
Fixed Right, First Time
Certified diesel technicians with real shop and roadside experience — we know the difference between a temporary fix and a real one.
- Certified, trained professionals
- Advanced diagnostic tools
- Long-term fixes, not band-aids
Honest, Upfront Service
Clear communication and honest pricing. No upselling, no delays, no unfinished jobs.
- Straight answers before we start
- We show up when we say we will
- Every breakdown treated like our own
Maintenance That Comes to Your Yard
Scheduled and preventive maintenance at your location — consistency without the hassle of shop visits. Many of our clients keep us long-term because we become part of their operation, not just an emergency call.
We keep detailed service history on every unit and make sure your trucks stay compliant, reliable, and ready for work every day.
Real 5-Star Google Reviews
From drivers and fleet managers we've gotten back on the road.
"Reliable mobile diesel repair. They saved me from a tow, handled the repair quickly, and made sure everything was running properly before leaving. Great service and very knowledgeable."
"Reliable, fast, and professional. On Road Diesel Repair fixed our semi on-site and minimized our downtime. Great service and fair pricing. Have used them a few times and now always use them for any type of maintenance. Definitely recommend!"
"Our delivery truck had a major suspension fault which also damaged the braking system. On Road Diesel Repair came to our facility and fixed our truck overnight. They were able to diagnose the issue very fast and also got the parts for us."
"Used their services to get my semi fixed. They are super knowledgeable, professional and reliable. They did a great work on my truck & knew exactly what they were doing and were very humble and affordable as well. Highly recommend!"
"Excellent road service. I had a head gasket blow, they changed my truck head gasket, put a new one in and I'm back on the road in 3 days. Thank you"
"Very professional and fast! He came in and fixed my truck under an hour, also very fair on price and fast on response, he was at the truck in less than 30 minutes. I highly recommend him."
"I had a great experience with the On Road Diesel Repair team. They arrived quickly, diagnosed the problem right away, and got me back on the road in no time. The mechanic was professional, friendly, and knew exactly what he was doing."
"It's 5 pm on Friday, I got tire replacement and lights replacement at a good price. Main thing is their services are fast — just came in 30 minutes and 2 men done all work in 20 minutes. Recommend to those who are stuck at the road, scale, even on weekends."
"I had an outstanding experience with On Road Diesel Repair 24/7 Road Service. Their response time was incredibly fast, and the team was professional, knowledgeable, and very helpful. They explained everything clearly."
"They are truly excellent, professional mechanics who know exactly what they're doing. I rated them 5 stars because they genuinely earned it. I was put out of service at the scale in the middle of nowhere and couldn't move until the repairs."
"Clear pricing, no surprises. They kept me updated and finished the repair quicker than expected."
"Fast response, great work, and very professional. They fixed our truck on-site and saved us a ton of time and a huge tow bill. Highly recommend!"
"Quick, efficient, and honest. Exactly what you want when you're stuck on the road."
"Fast honest on road diesel repair. Got me rolling quick, thanks"
"Prices are affordable, way of working so good, fast service. Will highly recommend them."
"Good and fast service, reasonable price"
"Expert man of the work, very good working, quick service team"
"Great road service and good price, nice guys"
"Highly recommend. Affordable prices"
"Good service and fast, easy going"
"Very good service and good price"
"Very good service, highly recommend"
"Great price, fast service"
"Good and fast service"
"Good price, very handsome man!"
"V gud road service"
"Humble people"
"Best service"
Founded by Mechanics, Built for Drivers
On Road Diesel Repair was founded by experienced diesel mechanics to serve the hardworking drivers and fleet managers who keep goods moving across the Pacific Northwest. What began as a single mobile mechanic service has grown into a trusted partner for fleets and independent truckers along the whole corridor.
We've built our reputation on rapid response, technical expertise, and honest service. Whether it's a breakdown on the highway or a scheduled fleet visit, our priority is simple: keep you moving.
Need Emergency Diesel Repair?
For urgent roadside assistance, call — it's always the fastest way. For scheduled maintenance or general questions, email or use the form.