Mobile 24/7 Truck & Equipment Repair in Fullerton, CA and the Surrounding Areas

Orange County Fleet Services provides 24/7 mobile fleet repair in Orange County for big rigs, heavy equipment and other types of commercial vehicles, big and small. We operate throughout Fullerton, Anaheim, Santa Ana, Orange, Garden Grove and the neighboring California towns, ensuring we’re there when you need us for fast roadside repairs. You can count on OC Fleet Services for quick dispatch, and with mobile workstations powered by Richard Petty Garage, we’re able to provide fast and accurate roadside truck repair and maintenance in a timely and cost-effective manner. To request 24/7 mobile semi repair in Orange County, don’t hesitate to call our commercial truck shop day or night.,

Two trucks parked next to each other one of which says orange country rice service
  • 24/7 Roadside Repair for Trucks
  • Mobile Semi Repair
  • Mobile Diesel Repair
  • Roadside Big Rig Repair
  • Mobile Tractor Trailer Repair
  • Mobile Trailer Repair
  • Commercial Vehicle Repair
  • Roadside Truck Starting
  • Windshield Replacement
  • Mobile RV Repair
  • Mobile Maintenance
  • Mobile Motorhome Repair
  • On-Site Heavy Equipment Repair
  • On-Site Equipment Maintenance
  • Roadside Fleet Vehicle Repair
  • 24/7 Fleet Vehicle Repair
  • Jump Starts
  • Fuel Delivery
A white truck with a crane on top of it is parked in a parking lot.

24/7 Commercial Roadside Assistance in Orange County

Our mobile response team is powered by FSI in collaboration with Richard Petty Garages. This allows our certified roadside repair technicians to provide fast and accurate services around the clock for all types of vehicles, including big rigs, RVs, motorhomes, trailers, rental cars, buses, work trucks, delivery vans, construction equipment and other fleet vehicles, big and small. Whether you’ve suffered a commercial vehicle breakdown and need to get back on the road fast, require roadside brake repair or are looking for on-site maintenance for heavy equipment, we’ve got you covered. Give us a call to request an estimate or dispatch for immediate 24/7 mobile fleet repair in OC.

Roadside Semi Truck Repair

When life on the road takes a turn for the worse, Orange County Fleet Services is here to help. Our 24/7 roadside semi repair service is designed to get truckers back on the road fast. We employ certified technicians skilled at diesel engine repair, truck transmission service, semi brake repair, truck electrical repair, truck diagnostics and solving no start issues. If your big rig gives you any trouble, call us for 24/7 heavy duty truck repair in Fullerton or the surrounding area. We care for all types of tractor trailers, including Freightliner, International, Navistar, Volvo and Mack.


Mobile Trailer Repair

Our team of trailer repair experts will ensure that your haul makes it safely to its destination. If you need trailer brake repair, trailer light repair, trailer electrical repair or other commercial trailer repair, we will come to you for fast and effective service. From routine trailer maintenance to complex chassis repairs, trailer door repairs and hydraulic services, we’ll get you back on the road in a timely manner.

Roadside Motorhome Repair

Don’t let RV engine trouble or other mishaps bring your vacation to a halt. Our expert mobile motorhome mechanics in Orange County are available day or night to service your recreational vehicle. We can fix motorhome engines, transmissions, brakes, electrical systems, steering, suspension and other components.


Our RV technicians also provide RV and motorhome maintenance, such as oil changes, fluid services and belt and hose replacements. Give us a call to request an estimate for roadside RV repair in OC.

Two orange county fleet service trucks are parked next to each other

DOT and BIT Inspections

If your commercial vehicle is due for a federal Department of Transportation Inspection (DOT inspection) or a state Basic Inspection of Terminals (BIT inspection), we can perform it at our facility. These commercial truck inspections are necessary to keep your vehicle safe and legally on the road. During these inspections we will check things like the brakes, tires and suspension systems, as well as go over maintenance records to ensure the vehicle is being properly serviced so as to prevent collisions and breakdowns. We are available anytime you need a BIT or DOT inspection in Fullerton.

A close up of a truck 's tire on a brick road.

Truck Tire Sales and Services 

OC Fleet Services offers new commercial tires in Fullerton for all types of fleet vehicles, big rigs and work trucks, as well as motorhomes. Aside from offering name brand fleet tire sales and tire installation, our shop also provides a variety of commercial tire services. This includes tire mounting, tire balancing, tire replacement and tire repair services, when possible. Whether in the shop or on the road, you can count on us for expert fleet tire services and commercial tire sales in Fullerton.

Interstate Battery Sales

We are a distributor of Interstate Battery products, one of the most trusted names in automotive batteries. We sell and install work truck batteries, motorhome batteries, fleet vehicle batteries and semi-truck batteries in Fullerton. We can service your vehicle either on the road and in our facility. Installing an Interstate Battery will give you the assurance you need that your vehicle will always start during the battery's lifetime, but it does come with a manufacturer warranty for added peace of mind . When it is time for a new commercial vehicle battery, we've got you covered.

At OC Fleet Service, we’ve made it our mission to provide the highest quality 24/7 commercial vehicle roadside repair in Orange County and beyond. Our mobile mechanics will work on anything that has an engine, so if you’ve suffered a breakdown or are having other fleet vehicle trouble, give us a call at (949) 899-6802 day or night.


We’d be happy to provide you a quote for the cost of mobile semi truck repair, mobile heavy equipment repair or other 24/7 fleet repair in Orange County or the surrounding areas.

Several trucks are parked in a parking lot and one of them is from seaway county fleet service

Orange County Fleet Services Blog

Common Big Rig Cooling System Problems that Should Be Fixed ASAP

By Orange County Fleet Services • July 17, 2026
A heavy-duty truck's cooling system works hard to keep the engine operating at a safe temperature, even under demanding conditions like hauling heavy loads or climbing steep grades. When cooling system problems develop, they can quickly lead to overheating and costly engine damage. Catching these issues early can help minimize downtime and avoid more expensive repairs. At Orange County Fleet Services, we provide expert big rig cooling system repair in the greater Fullerton area. Here are four common big rig cooling system problems that should be addressed as soon as possible. Coolant Leaks Coolant leaks are one of the most common cooling system problems in commercial trucks. Leaks may develop in hoses, the radiator, water pump, or other cooling system components. Even a slow leak can gradually lower coolant levels enough to cause overheating. If you notice coolant puddles beneath the truck or frequently need to add coolant, professional repairs are likely needed. Failing Water Pump The water pump circulates coolant throughout the engine and radiator. When it begins to fail, coolant flow is reduced, making it difficult for the engine to maintain proper operating temperatures. Signs of a failing water pump may include coolant leaks, unusual noises, and rising engine temperatures. Replacing a worn water pump promptly helps prevent severe overheating. Stuck or Faulty Thermostat The thermostat regulates coolant flow based on engine temperature. If it becomes stuck closed, coolant cannot circulate properly, causing the engine to overheat quickly. A faulty thermostat should be addressed ASAP. Clogged or Damaged Radiator Over time, dirt, road debris, corrosion, and mineral deposits can restrict flow through the radiator. A clogged radiator reduces the cooling system's ability to remove heat from the engine. External damage from road hazards can also compromise radiator performance. Regular inspections and cleaning help keep the radiator operating efficiently. Big Rig Cooling System Repair in Fullerton, CA For expert big rig cooling system repair in Fullerton, CA and the surrounding area, contact Orange County Fleet Services at  (949) 899-6802  . Our local semi truck mechanics can expertly handle your big rig repair and maintenance needs!

Common Big Rig Cooling System Problems that Should Be Fixed ASAP

By Orange County Fleet Services • July 17, 2026
A heavy-duty truck's cooling system works hard to keep the engine operating at a safe temperature, even under demanding conditions like hauling heavy loads or climbing steep grades. When cooling system problems develop, they can quickly lead to overheating and costly engine damage. Catching these issues early can help minimize downtime and avoid more expensive repairs. At Orange County Fleet Services, we provide expert big rig cooling system repair in the greater Fullerton area. Here are four common big rig cooling system problems that should be addressed as soon as possible. Coolant Leaks Coolant leaks are one of the most common cooling system problems in commercial trucks. Leaks may develop in hoses, the radiator, water pump, or other cooling system components. Even a slow leak can gradually lower coolant levels enough to cause overheating. If you notice coolant puddles beneath the truck or frequently need to add coolant, professional repairs are likely needed. Failing Water Pump The water pump circulates coolant throughout the engine and radiator. When it begins to fail, coolant flow is reduced, making it difficult for the engine to maintain proper operating temperatures. Signs of a failing water pump may include coolant leaks, unusual noises, and rising engine temperatures. Replacing a worn water pump promptly helps prevent severe overheating. Stuck or Faulty Thermostat The thermostat regulates coolant flow based on engine temperature. If it becomes stuck closed, coolant cannot circulate properly, causing the engine to overheat quickly. A faulty thermostat should be addressed ASAP. Clogged or Damaged Radiator Over time, dirt, road debris, corrosion, and mineral deposits can restrict flow through the radiator. A clogged radiator reduces the cooling system's ability to remove heat from the engine. External damage from road hazards can also compromise radiator performance. Regular inspections and cleaning help keep the radiator operating efficiently. Big Rig Cooling System Repair in Fullerton, CA For expert big rig cooling system repair in Fullerton, CA and the surrounding area, contact Orange County Fleet Services at  (949) 899-6802  . Our local semi truck mechanics can expertly handle your big rig repair and maintenance needs!

What are some of the common causes of semi truck tire blowouts?

By Orange County Fleet Service • June 18, 2026
Semi truck tire blowouts are among the most dangerous situations commercial drivers can face on the road. A sudden tire failure can make a vehicle difficult to control, increase the risk of accidents, and lead to costly downtime. Because commercial trucks travel long distances and carry heavy loads, their tires are subjected to significant stress every day. Understanding the most common causes of blowouts can help fleet operators and drivers reduce risks and improve safety. But if your semi truck does suffer a tire blowout, our team at Orange County Fleet Service can provide roadside help. Here are four common causes of semi truck tire blowouts. Improper Tire Inflation Incorrect tire pressure is one of the leading causes of tire failure. Underinflated tires generate excessive heat as they flex more than intended during operation. Overinflated tires, on the other hand, are more vulnerable to damage from road hazards. Regular tire pressure checks help ensure tires operate within the manufacturer's recommended range and reduce the likelihood of a blowout. Overloaded Trailers Exceeding a tire's weight capacity places tremendous stress on the tire structure. Overloaded trailers can cause tires to overheat, wear unevenly, and fail prematurely. Proper load distribution and adherence to weight limits are essential for protecting tires. Road Hazards and Debris Sharp objects, potholes, curbs, and road debris can damage a tire's sidewall or tread. In some cases, the damage may not be immediately visible but can weaken the tire over time. Eventually, the compromised area may fail while the truck is traveling at highway speeds. It’s important for drivers to remain alert and avoid road hazards whenever possible. Worn or Damaged Tires Tires naturally wear down with use, and excessive tread wear reduces their ability to withstand the demands of commercial driving. Cracks, cuts, and bulges are signs that a tire may be nearing failure. Routine inspections help identify damaged tires before they become increasingly serious safety risks. 24/7 Roadside Semi Truck Tire Services in Orange County, CA For expert semi truck tire services in Fullerton, CA and the surrounding area, contact Orange County Fleet Service at  (949) 899-6802  . With our mobile service, we can come to you to handle your semi truck tire needs in greater Fullerton, CA!

Common Questions About Semi Truck Fuel System Repair in Fullerton, CA

By Orange County Fleet Services • May 25, 2026
A semi truck’s fuel system is essential for delivering the power and efficiency needed to haul heavy loads over long distances. When something goes wrong, it can lead to poor performance and even costly downtime. Because these systems are more complex than those in standard vehicles, many drivers and fleet owners have questions about how they work and when repairs are needed. At Orange County Fleet Services, we’re happy to answer your questions about semi truck fuel system repair in the greater Fullerton area. What Does the Fuel System Do? The fuel system is responsible for storing, filtering, and delivering fuel to the engine in the correct amount and at the proper pressure. Key components include the fuel tank, fuel pump, fuel injectors, and fuel filters. In modern diesel engines, the system must precisely control fuel delivery to ensure efficient combustion, optimal power output, and reduced emissions. What Are Common Symptoms of Fuel System Problems? There are several warning signs that may indicate a fuel system issue. These include difficulty starting the engine, loss of power, poor fuel-efficiency, and rough idling. You might also notice unusual noises or fuel leaks. If any of these symptoms appear, it’s important to have the system inspected promptly to avoid further damage. How Can I Help Keep My Truck’s Fuel System Healthy? Regular maintenance is key to keeping a semi truck’s fuel system in good condition. Fuel filters should typically be replaced according to the manufacturer’s recommendations. Routine inspections can help identify worn or failing components before they cause major issues. Staying on top of maintenance helps improve reliability and extend the life of the system. Why Is Professional Repair Important? Semi truck fuel systems operate under high pressure and require specialized knowledge and equipment to diagnose and repair properly. Attempting to fix issues without the right expertise can lead to further damage or even safety risks. Professional technicians have the tools and training needed to accurately identify problems, perform precise repairs, and ensure the system is functioning efficiently. Where Can I Get Semi Truck Fuel System Repair in Fullerton, CA? For expert semi truck fuel system repair in Fullerton, CA and the surrounding area, contact Orange County Fleet Services at  (949) 899-6802  . Our local semi truck mechanics can thoroughly address your big rig repair and maintenance needs!

Read the Recent Reviews for Orange County Fleet Services in Fullerton, CA!

By Orange County Fleet Services • April 20, 2026
At Orange County Fleet Services, we strive to earn our clients’ complete satisfaction by providing expert fleet vehicle repair and maintenance at fair rates. From semi trucks to delivery vans to construction equipment, we can return your vehicles to reliable condition. Our team offers both roadside and in-shop fleet vehicle repairs in greater Fullerton. And we appreciate it when our clients offer feedback about their experiences with us. Here’s a look at some of our recent reviews. “Great service. Your go-to in the Orange County area for your truck issues.” —Darren E. “Fixed some show production trailers while we were in the middle of an event, so that we could save time on move out. Excellent service, fair price, amazing response time. We weren’t sure anyone would even be able to help us “on site”! Thanks!!” —Team Ski Dazzle “AC went out in Nevada, made it delivery in LA driving mostly at night. Company found OC Fleet Services and was assured they’ll solve the problem. They fixed it and it could’ve taken days waiting for a part but, they found a way to get me back on the road. Great service.” —Charles S. “The guys were fast and friendly, got us back on the road ASAP.” —Garth G. “Took my school bus to OCFS for maintenance and repairs and everything was taken care of in a timely manner. Darrin was knowledgeable and helped me make the decisions needed to keep my family safe on the road. The price was very reasonable. And I am now ready and confident to take my children across the country. Thank you, Darrin et al. See you next time!” —Sophia L. “Came into OCFS with a derate on my truck. Friendly, professional, timely service. Very fair pricing on top. Can’t ask for much more than they did. Time is money and I was only down for an afternoon thanks to them. Will bring my equipment back anytime. Highly recommend.” —Aaron B. Fleet Vehicle Repair and Maintenance in Orange County, CA When you need fleet vehicle repair and maintenance in Fullerton and the surrounding area, contact Orange County Fleet Services at  (949) 899-6802  . Feel free to give us a call to m ake an appointment for fleet vehicle service in greater Fullerton, CA !
A large semi-truck drives down a road at twilight with mountains in the background, viewed from inside another vehicle.

FAQs About Big Rig Suspension Repair in Fullerton, CA

By Orange County Fleet Services • March 17, 2026
Get expert big rig suspension repair to ensure safety & performance. Contact us for mobile services in Fullerton, CA!
A dark blue semi-truck with a large trailer driving on an open road beside green bushes under a clear blue sky.

FAQs about Big Rig Cooling System Repair in Fullerton, CA

By Orange County Fleet Services • February 20, 2026
Get answers to FAQs about big rig cooling system repair. Learn signs of issues & maintenance tips. Contact us for 24/7 truck repair!
Close-up of truck wheels, revealing tires and shiny rims. The truck is gray, parked on a cobblestone street.

5 Tips for Preventing Big Rig Tire Blowouts

By Orange County Fleet Service • January 22, 2026
Learn 5 tips to prevent big rig tire blowouts, including maintenance & safe driving. Contact us for expert roadside assistance!
Semi-trucks with open hoods parked outside on a sunny day. White and red trucks are visible.

4 Reasons to Always Keep Up With Your Semi Truck’s Oil Change Schedule

By Orange County Fleet Services • December 16, 2025
Learn 4 reasons to keep your semi truck's oil change schedule. Ensure engine health & reduce repair costs with our expert maintenance.
Blue semi-truck driving on a road with green bushes and blue sky.

Tips for Keeping Your Semi Truck’s Engine Healthy Over the Long Haul

By OC Fleet Services • November 20, 2025
Learn essential tips for maintaining your semi truck’s engine. Contact OC Fleet Services for expert fleet maintenance in Orange County.
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Why It’s So Important to Keep Up with Maintenance for Your Fleet Vehicles

By OC Fleet Services • October 23, 2025
Regular fleet vehicle maintenance is vital for safety & efficiency. Contact us for expert services to reduce risks & extend vehicle lifespan.