4K Repair Services 

About us

At 4K Repair Services, we keep Arizona moving — one engine, one fleet, one hardworking business at a time. Founded and operated by Nickolas Bottum, a certified diesel and heavy equipment technician, our mission is simple: provide honest, reliable, and fast on-site repair for anyone who can’t afford downtime.

We understand what it’s like to be stranded on the job site or roadside at 2 A.M. That’s why we offer 24/7 mobile service, bringing dealership-level diagnostics, tools, and experience right to your location. Whether it’s a semi-truck, forklift, RV, construction loader, or farm tractor — if it’s got an engine, we’ll get it running.

With years of experience across oil fields, airports, and fleet operations, 4K Repair Services delivers more than repairs — we deliver trust, transparency, and turnaround time that matters.

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 Our Services

We handle nearly everything mechanical, electrical, or hydraulic — on-site or roadside.

 Diesel & Fleet Repair

Full-service diagnostics for diesel trucks and semis

Turbo, injector, and fuel system repair

DEF & DPF service and maintenance

EGR & emission system troubleshooting

Clutch, transmission, and driveline repair

Preventive maintenance programs for fleet accounts

 Heavy Equipment & Construction

Loader, backhoe, and excavator repair

Hydraulic hose and cylinder replacement

Engine rebuilds and electrical troubleshooting

Equipment inspections and scheduled maintenance

 Farm & Agricultural Equipment

Tractor engine service and hydraulics

Power take-off (PTO) repair

On-site diagnostics and maintenance

 RVs & Specialty Vehicles

Engine and generator repair

Brake, electrical, and cooling system service

Roadside diagnostics and assistance

 Diagnostics & Electrical

Full OBD & OEM diagnostic scanning

Battery, alternator, and starter replacement

Wiring repair and lighting systems

 Welding & Fabrication

On-site MIG/TIG welding and metal repair

Bracket, frame, and component reinforcement

 Emergency Road Service (24/7)

On-site breakdown repair

Jump starts, lockouts, and fuel delivery

Tire service and mobile diagnostics

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 Why Choose 4K Repair Services

24/7 emergency response — we come to you, anywhere in Arizona

Honest pricing with no hidden fees

Certified, experienced, and fully mobile

Fleet and commercial accounts welcome