24/7 Mobile Semi Truck & Trailer Mechanic

Semi Truck Down?

We Come to You.

Road Wrench is Phoenix Metro's 24/7 mobile semi truck mechanic — Class 8 roadside repair, mobile trailer repair, and emergency truck repair serving Gilbert, Chandler, Mesa, Phoenix, Glendale, Goodyear, Avondale, Buckeye, Queen Creek, Eloy, and surrounding areas. One call and we're rolling.

24/7 Mobile Semi Truck Mechanic
Class 8 & Heavy Duty Specialists
Gilbert · Chandler · Mesa · Phoenix · Glendale · Goodyear · Avondale · Buckeye · Queen Creek · Eloy
24/7
Mobile Semi Truck Mechanic
Class 8 roadside repair, day or night
100 Mi
Phoenix Metro Coverage
Gilbert, Chandler, Mesa, Phoenix, Glendale, Goodyear, Avondale, Buckeye, Queen Creek, Eloy & beyond
Class 8
Heavy Duty Specialists
Semis, tractor-trailers, and fleet vehicles
Fast
Emergency Dispatch
Mobile trailer repair & roadside semi truck repair
Mobile Repair — Phoenix Metro

Mobile Semi Truck & Trailer Repair

24/7 Class 8 roadside semi truck repair and mobile trailer repair — wherever you're stranded in the Phoenix metro. Gilbert, Chandler, Mesa, Phoenix, Glendale, Goodyear, Avondale, Buckeye, Queen Creek, Eloy, and beyond.

Most Requested

Emergency Roadside Repair

Broken down on I-10 or US-60? We dispatch immediately. No waiting for a tow — we come to your location and get you rolling.

24/7

Engine Diagnostics & Repair

Full diesel engine diagnostics with professional-grade equipment. We identify the problem fast and fix it on-site.

Brake Systems

Air brake inspection, adjustment, and repair for trucks and trailers. Safety-critical work done right.

Electrical & Wiring

Trailer lighting, chassis wiring, alternator, and electrical diagnostics for all heavy duty applications.

Trailer Repairs

Suspension, landing gear, glad hands, seals, and structural trailer repairs handled on location.

Preventive Maintenance

Scheduled PM services to keep your fleet running and avoid costly breakdowns. We come to your yard.

Quick Fix

Jump Starts

Dead battery on your semi? We carry commercial-grade jump packs for Class 8 trucks. Fast response, no tow needed.

Tire Service

Blowout or flat on a drive axle or trailer? We carry commercial truck tires and mount on-site to get you rolling.

Lockouts & Fuel Delivery

Locked out of your cab or ran out of diesel? We handle both — fast, on-location, no waiting for a tow truck.

Coverage Area

Gilbert · Chandler · Mesa · Phoenix · Glendale · Goodyear · Avondale · Buckeye · Queen Creek · Eloy

Road Wrench is Phoenix Metro's mobile semi truck mechanic — serving Gilbert, Chandler, Mesa, Phoenix, Glendale, Goodyear, Avondale, Buckeye, Queen Creek, Eloy, and all surrounding communities. We run every major corridor: I-10, I-17, US-60, Loop 101, Loop 202, SR-303, SR-85, US-93, and SR-89 — out to Casa Grande, Wickenburg, and Prescott. Broken down anywhere in the Phoenix metro? Our Class 8 roadside repair unit dispatches directly to you.

Key Highways

I-10I-17US-60Loop 101Loop 202SR-303SR-85US-93SR-89

Cities Served

PhoenixMesaChandlerGilbertTempeScottsdaleGlendalePeoriaSurpriseGoodyearAvondaleBuckeyeTollesonLitchfield ParkEl MirageYoungtownSun CitySun City WestWaddellMaricopaQueen CreekSan Tan ValleyApache JunctionGold CanyonFlorenceCasa GrandeCoolidgeEloyWickenburgWittmannMorristownPrescott ValleyPrescottChino ValleyBlack Canyon CityAnthemNew RiverCave CreekCarefreeFountain HillsPayson
Road Wrench mechanic working on a diesel truck

Dispatch Now

(480) 849-5261

Truck Down?

Call Road Wrench.

Don't wait for a tow. Our 24/7 mobile semi truck mechanic handles Class 8 roadside repair, mobile trailer repair, and emergency truck repair — Gilbert, Chandler, Mesa, Phoenix, Glendale, Goodyear, Avondale, Buckeye, Queen Creek, Eloy, and all surrounding areas.

(480) 849-5261
Heavy duty diesel truck engine
Real Jobs. Real Repairs.

Recent Work in the Field

Every repair is documented on-site. These are actual jobs completed by RoadWrench technicians across Phoenix Metro — no stock photos, no staged shots.

Broken air line fitting on Western Star semi truck air dryer — leaking red push-to-connect fitting on air brake system requiring emergency roadside repair in Chandler AZ
Before
Air Brake System·Western Star · Chandler AZ

Air Dryer Fitting — Failed

Cracked and leaking push-to-connect air line fitting on the air dryer supply line. Pressure loss in the air brake system — a DOT violation and a safety hazard. Truck sidelined roadside.

RoadWrench mobile mechanic repairing Western Star semi truck air dryer air line fitting — replacing broken push-to-connect fitting on air brake system during roadside repair in Chandler AZ
Repaired
Air Brake System·Western Star · Chandler AZ

Air Dryer Fitting — Replaced

New push-to-connect fitting installed. System pressure restored, air brake function verified, truck cleared for road. Completed on-site — no tow, back rolling the same day.

Failed starter motor on Freightliner Cascadia semi truck — worn and corroded starter requiring replacement during mobile roadside repair in Mesa AZ
Before
Electrical / Starting System·Freightliner Cascadia · Mesa AZ

Starter Motor — Failed

Worn-out starter — corroded terminals, seized internals, no crank. Pulled roadside in Mesa with the truck fully loaded and on a tight delivery schedule.

New starter motor installed on Freightliner Cascadia semi truck — completed mobile starter replacement with fresh wiring connections during roadside repair in Mesa AZ
Repaired
Electrical / Starting System·Freightliner Cascadia · Mesa AZ

Starter Motor — Replaced

New OEM-spec starter installed, terminals torqued, wiring cleaned and secured. Cranked on the first turn. On-site in Mesa — no tow, no shop wait.

Disconnected and ruptured air and electric lines at Strick trailer gladhand and QBox connection panel — dangling air hoses and severed electrical cables on semi truck trailer requiring emergency mobile mechanic repair in Gilbert AZ
Before
Air & Electrical Lines·Semi Trailer · Gilbert AZ

Gladhand & Electric Lines — Disconnected

Ruptured air hoses and severed cables hanging loose at the QBox panel. No air to trailer brakes, no running lights — DOT out-of-service.

Close-up of completely severed semi truck trailer air line on trailer step — cut black air hose next to new green replacement air line during RoadWrench mobile mechanic repair in Gilbert AZ
Damage Detail
Air Lines·Semi Trailer · Gilbert AZ

Trailer Air Line — Completely Severed

The old black air line cut clean through — zero pressure to the trailer brakes. New green replacement line staged alongside it, ready to route.

RoadWrench mobile semi truck mechanic repairing ruptured air and electric lines on semi truck and trailer — new green air lines and electrical cables routed and secured at tractor-trailer connection during roadside repair in Gilbert AZ
Repaired
Air & Electrical Lines·Semi Truck & Trailer · Gilbert AZ

Air & Electric Lines — Fully Restored

New air supply and electric lines routed, secured, and connected. Trailer brakes pressurized, lights verified, rig cleared for road. No tow, back rolling the same day.

Freightliner Cascadia dashboard in derate mode showing Parked Regen Required warning and DPF fault lights — semi truck stuck in engine derate near Phoenix AZ requiring mobile DPF mechanic
Derate Active
DPF / Emissions·Freightliner Cascadia · Phoenix AZ

DPF Derate — Parked Regen Required

Dashboard lit up with "Parked Regen Required" and multiple DPF fault codes. Engine derate limits power to 5 mph — truck effectively dead on the road.

RoadWrench mobile semi truck mechanic running DPF diagnostic software on laptop inside service truck cab — reading Freightliner Cascadia DPF fault codes and emissions data during roadside derate repair near Phoenix AZ
Diagnosing
DPF / Emissions·Freightliner Cascadia · Phoenix AZ

On-Site DPF Diagnostics

Connected to the ECM roadside, pulling live DPF soot load, exhaust temps, and fault codes — the same tools a dealership uses, brought directly to the truck.

Freightliner Cascadia dashboard showing Parked Regen Complete notice with fault lights cleared — DPF derate resolved by RoadWrench mobile semi truck mechanic near Phoenix AZ
Regen Complete
DPF / Emissions·Freightliner Cascadia · Phoenix AZ

DPF Derate — Cleared

"Parked Regen Complete" — fault lights cleared, derate lifted, full power restored. From 5 mph derate to road-ready without a tow or shop visit.

RoadWrench mobile truck and trailer mechanic repairing broken pressure sensor and leaking air line on Volvo VNL semi truck air dryer — roadside air brake system repair near Glendale AZ
Repaired
Air Dryer / Air Brake System·Volvo VNL · Glendale AZ

Air Dryer — Sensor & Line Replaced

Failed pressure sensor and leaking air line on a Volvo VNL air dryer. New sensor installed, leaking line reseated and secured, system pressure verified. Back on the road without a tow.

Freightliner Cascadia dashboard showing Engine Protection Performing Shutdown warning — semi truck engine shutting off due to low coolant level fault triggered by bad coolant level sensor in Mesa AZ, repaired by RoadWrench mobile semi truck mechanic
Engine Shutdown
Cooling System·Freightliner Cascadia · Mesa AZ

Engine Protection Shutdown — Low Coolant Fault

"Engine Protection Performing Shutdown" on the dash — the Cascadia's protection system triggered an automatic shutdown. Root cause: a faulty coolant level sensor sending a false low-coolant signal to the ECM.

RoadWrench mobile semi truck mechanic replacing faulty coolant level sensor on Freightliner Cascadia engine — hands-on coolant reservoir sensor swap during roadside repair in Mesa AZ to fix engine protection shutdown fault
Repairing
Cooling System·Freightliner Cascadia · Mesa AZ

Coolant Level Sensor — Replaced On-Site

Bad coolant level sensor pulled and replaced roadside in Mesa. No actual coolant loss — the sensor was feeding the ECM a false reading, triggering the engine protection shutdown. Fixed on-site, no tow needed.

Freightliner Cascadia dashboard cleared after coolant level sensor replacement — engine protection fault resolved, truck running normally at 111°F ambient temperature in Mesa AZ by RoadWrench mobile diesel mechanic
Fault Cleared
Cooling System·Freightliner Cascadia · Mesa AZ

Engine Fault Cleared — Back on the Road

Dashboard cleared, engine protection fault gone, truck running strong at 111°F Arizona heat. New sensor confirmed accurate coolant level — no more false shutdowns. Rolling again without a shop visit.

Truck down? We document every job and get you back on the road fast.

Call (480) 849-5261
Verified Google Reviews

What Drivers Are Saying

5.0
10 reviews on Google
T

TDF TDF

Aug 17, 2026

My semi-truck broke down because of an air leak, but he fixed it in less than an hour. Great price. I appreciate it 🙏

Google Review
T

Tarek Tarekone1980

Aug 17, 2026

Excellent work on my Freightliner. Fast diagnosis, fair price, and got me back on the road without any delays. Highly recommend this mechanic for any semi truck repairs.

Google Review
M

Milos Dedejic

Aug 15, 2026

Fixed my truck real quick and charged 2x less than what other road services gave estimate for. Really appreciate that!!

Google Review
E

Elijah Wilson

Aug 14, 2026

Uros with RoadWrench came to rescue when my Freightliner Cascadia needed a new steer tire in Goodyear. He came out right away, replaced my semi tire and I was able to keep on rolling.

Google Review
D

David Towson

Aug 12, 2026

Have a Diesel Semi Truck 2020 VNL 760 Volvo needed a jump in the middle of the night (3am). Came right out & got me going! Thank you!

Google Review
E

Eddy

Aug 11, 2026

Nobody wants to deal with a flat tire. It's stressful, frustrating, and never happens at a good time. I'm really glad I found RoadWrench 24/7 Truck Mobile Repair. Helpful is an understatement. They got me back up and running quickly, charged a fair price, and even gave me great advice on replacing the tire that was damaged. I rarely leave reviews, but the customer service was good enough that I felt like I had to. Highly recommend RoadWrench if you ever find yourself needing mobile truck repair.

Google Review
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