Mobile RV Repair · Boise & the Highway 55 Corridor

Mobile RV Repair — Boise & the Treasure Valley

Broke down on the way to McCall, Horseshoe Bend, or Payette? We come to you. Fast diagnosis, on-site repair, back on your trip the same day.

Call 208-809-0305

We come to you

Mobile RV repair — on the road, in the campground, wherever you are.

Diesel Pusher Motorhomes

Cummins, CAT, and Detroit powered motorhomes across all chassis types. Factory diagnostic software on board for accurate on-site diagnosis.

Gas Motorhomes

Engine diagnosis and repair on gas-powered Class A, B, and C motorhomes. No-start, overheating, check engine light — we fix it on-site.

Highway 55 Corridor

Horseshoe Bend, Cascade, Donnelly, McCall — we cover the full corridor. Don't let a breakdown end your trip to the mountains.

Treasure Valley & Beyond

Boise, Meridian, Nampa, Caldwell, Mountain Home, Payette, and Ontario OR. If you're within about an hour of Garden City, we'll come to you.

Common RV Repairs We Handle On-Site

A breakdown on the way to a campsite or mountain destination is stressful. We move fast, diagnose accurately, and fix it on the spot so your trip isn't over before it starts.

Diesel Pusher & Motorhome Repairs

  • No-start diagnosis and repair — cranks but won't fire, or won't crank at all. Fuel system, electrical, or mechanical. We diagnose and fix on-site.
  • Engine derate and fault codes — limp mode or sudden power loss is almost always DEF or aftertreatment related. We clear faults properly with factory software, not just reset the light.
  • Overheating — cooling system failures on the road. Thermostat, water pump, radiator, or coolant leak diagnosis and repair where possible on-site.
  • Cummins ISB and ISC diagnosis — common in Class A diesel pushers. Factory Cummins software on board for accurate diagnosis.
  • CAT engine service — factory CAT diagnostic tools for motorhomes running CAT powerplants.
  • DEF system faults — contaminated DEF, failed DEF injector, or NOx sensor causing derate. Diagnosed and resolved on-site.
  • Generator diagnosis — diesel generator failures diagnosed alongside the main engine.

Fifth Wheels, Trailers & Tow Vehicles

  • Tow vehicle diagnosis — Cummins, Powerstroke, or Duramax tow vehicle issues diagnosed and repaired on-site.
  • Brake system inspection and repair — trailer brakes, electric brake controllers, and tow vehicle brake service.
  • Electrical diagnosis — trailer lights, brake controllers, running gear electrical issues.
  • Pre-trip inspection — heading out on a long trip? We'll come to you for a pre-departure inspection so you don't find out there's a problem 200 miles from home.

Where We Cover

We're based in Garden City and roll to approximately one hour out. Call us for locations beyond — we'll do our best to get to you.

Highway 55 CorridorHorseshoe Bend · Cascade · Donnelly · McCall
Highway 95 CorridorEmmett · Payette · Ontario OR
I-84 CorridorBoise · Mountain Home · Caldwell · Nampa
Treasure ValleyMeridian · Star · Eagle · Middleton · Garden City
Campgrounds & RV ParksWe come to where you're parked
Beyond?Call us — we'll do our best

What We Fix On-Site

No-start diagnosis and repair
Engine derate and fault code clearing
DEF system diagnosis and repair
Overheating and cooling system repair
Cummins ISB and ISC diagnosis — factory software
CAT engine diagnosis — factory software
Detroit diesel diagnosis — factory software
Electrical diagnosis and repair
Brake system inspection and repair
Generator diagnosis
Tow vehicle diesel repair — Cummins, Powerstroke, Duramax
Pre-trip inspection before heading to the mountains

What RV travelers say

Real customers. Real breakdowns. Back on the road.

★★★★★

"My RV broke down on the way up to Horseshoe Bend — luckily I found Interstate Diesel by searching best mobile RV repair in Boise. Amazingly they had me back on the road within an hour. They are definitely my new go to!"

Google Review — Treasure Valley
★★★★★

"I was on my way up to Payette when my RV completely lost power. I called them for help and they drove out to exactly where I was stranded. They diagnosed the issue and got it fixed fast. Thanks to them my trip wasn't ruined."

Google Review — Highway 95
★★★★★

"Interstate Diesel is a lifesaver. Tony went above and beyond to help us and we really appreciate his professionalism, communication, and willingness to help. We will definitely recommend them to anyone looking for honest, dependable diesel service."

Google Review — Treasure Valley

Common questions

Mobile RV Repair FAQ

What areas do you cover for mobile RV repair?
We're based in Garden City and roll to about an hour out in every direction — the Highway 55 corridor (Horseshoe Bend, Cascade, Donnelly, McCall), the Highway 95 corridor (Emmett, Payette, Ontario OR), and the I-84 corridor (Boise, Mountain Home, Caldwell, Nampa), plus the rest of the Treasure Valley. If you're broken down beyond that, call anyway — we'll do our best to get to you.
Do you work on gas motorhomes or just diesel pushers?
Both. We handle diesel pusher motorhomes running Cummins, CAT, and Detroit engines with factory diagnostic software on board, and we also diagnose and repair gas-powered Class A, B, and C motorhomes — no-start, overheating, check engine light, and more.
How fast can you get to me if I break down on Highway 55?
Response time depends on where you are on the corridor and what else is on the schedule that day, but the Highway 55 route to McCall is exactly the kind of call we built this service for. Call (208) 809-0305, tell us your location and what the RV is doing, and we'll give you a straight answer on timing.
What if my RV can't be fixed on the side of the road?
Most no-start, derate, overheating, and electrical issues we can diagnose and resolve on-site. If a repair genuinely needs shop equipment — a major engine teardown, for example — we'll tell you straight and help you figure out the best next step rather than run up a bill on a repair that won't hold.
Do you handle fifth wheels, trailers, and tow vehicles too?
Yes. Beyond motorhomes, we diagnose and repair Cummins, Powerstroke, and Duramax tow vehicles, trailer and tow vehicle brake systems, electric brake controllers, and trailer electrical issues. We also do pre-trip inspections before you head out, so a problem gets caught in your driveway instead of 200 miles from home.
How much does mobile RV repair cost?
It depends on what's wrong and what it takes to fix it on-site versus in the shop. There's no charge just to guess — call with your location and symptoms and we'll give you a straight answer on what it'll take and what it'll cost before anyone rolls a truck.

Broke down? Call now.

Tell us where you are and what your RV is doing. We'll give you a straight answer on whether we can help and how fast we can get there. Don't let a breakdown end your trip.

Call 208-809-0305