Precision Diesel Repair
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Mobile Diesel Truck Repair & Fleet Maintenance in Orange County

Precision Diesel delivers expert mobile diesel truck repair and fleet maintenance services across Orange County. Our ASE-certified mechanics provide fast, reliable, and affordable solutions tailored to your heavy-duty trucks, trailers, and fleet vehicles—right where you are.
Get a Quote Today

Call today for a schedule of services and rates: 714-878-2571

Trusted Diesel Engine Repair & Fleet Service in Orange County

When it comes to diesel engine repairs in Orange County, Precision Diesel is your local go-to. Our skilled mechanics and technicians are ASE-certified and use advanced diagnostic tools to service a wide range of diesel vehicles. From routine checkups to complex engine overhauls, we ensure your fleet stays running at peak performance. We prioritize regular maintenance to help you avoid costly breakdowns, reduce downtime, and extend your vehicle’s life. Our team specializes in fixing diesel engines with precision and care. From minor repairs to complete engine overhauls, we make sure every diesel engine performs at its best. Call us today at 714-878-2571 or stop by to book your appointment with a reliable, professional heavy duty diesel mechanic team.
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Local Expertise You Can Count On

Finding a skilled diesel mechanic Orange County can trust is essential for keeping your vehicles on the road. Our certified technicians provide reliable service for trucks, fleet vehicles, and personal diesel vehicles. At Precision Diesel, we understand Orange County’s streets, freeways, and business demands like no one else. Our heavy duty diesel mechanic technician is deeply familiar with the needs of local fleet operators and independent truck owners. We take pride in offering fast response times and reliable service tailored to our community. Our reputation is built on trust, transparency, and consistent results. Experience the Precision Diesel Difference.

Diesel Services You Can Rely On in Orange County

Precision Diesel offers a complete range of diesel and gas vehicle services throughout Orange County. From general auto repairs to specialized fleet maintenance services, we do it all. We also provide mobile diesel fueling services in Orange County, making it easier than ever to keep your fleet running efficiently without unnecessary downtime. We also offer mobile diesel mechanic Orange County CA services, bringing our expertise directly to your location. Whether it’s a fleet vehicle or a single truck, we handle repairs on-site to save time.

Our ASE-certified diesel mechanics near you use top-of-the-line diagnostic tools and prioritize transparent communication every step of the way. We’re known for our reliability, fast turnaround, and honest pricing. Our diesel mechanic Orange team handles everything from engine diagnostics to full repairs, ensuring vehicles stay in top condition. Contact us now to schedule service or learn how we can help your fleet.

Reliable Diesel Services in Orange County

Diesel engines require specialized care to keep performing at their best. In Orange County, skilled Mercedes diesel mechanics ensure your vehicle stays efficient and safe on the road. If you need quick and convenient service, a mobile diesel mechanic can reach you wherever you are, offering repairs and maintenance without disrupting your schedule. For heavy trucks, a mobile diesel truck mechanic provides on-site solutions, helping fleets stay productive and minimizing downtime.

Routine checks and maintenance are essential for longevity. An Orange County diesel mechanic can handle diagnostics, engine tuning, and repair, while an Orange diesel mechanic provides personalized service for individual drivers. Services like Orange County diesel maintenance and diesel repair in Orange County, CA prevent small problems from turning into costly issues.

For businesses, keeping multiple vehicles running efficiently is critical. All American diesel and fleet services offers expert fleet management, while all American diesel focuses on precise repairs and engine performance. Comprehensive all American diesel Service includes preventive maintenance and performance checks. Professionals in diesel fleet services and American diesel repair ensure all diesel engines stay reliable and efficient, so downtime is minimized and productivity stays high.

Our Diesel Services in Orange County

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Fleet Maintenance

Fleet operators in Orange County trust us for proactive fleet maintenance that prevents costly breakdowns and keeps vehicles compliant and road-ready.

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Roadside Assistance

Stranded on the 405 or I-5? Our Orange County roadside assistance team responds quickly to get you back on the road safely.

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Preventative Maintenance

Need preventative maintenance in Orange County? We keep trucks running longer with oil changes, inspections, and tune-ups performed on-site.

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Compliance Inspections

Ensure your fleet meets federal safety standards with FMCSA compliance inspections offered locally in Orange County.

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DOT Inspection Orange

DOT inspections in Orange County are fast, accurate, and convenient with our mobile service trucks.

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Belt Inspection Orange

Don’t risk downtime—get timely belt inspections from Orange County’s diesel pros.

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Trailer Repair Orange

Mobile trailer repair in Orange County is just a call away—perfect for local haulers and logistic providers.

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Heavy Equipment Repair

We service heavy equipment across Orange County job sites, minimizing delays and improving uptime.

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Welding & Fabrication

Need welding or custom fabrication in Orange County? We handle frame repairs, reinforcements, and more.

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Chassis Repair Orange

Chassis repair services in Orange County help extend the life of your heavy-duty truck and trailer.

Our Diesel Repair Services in Orange County

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General Diesel Repair

Is it time for general diesel repair shop in Orange County California​? Our experienced mobile mechanics handle all makes and models, fast.

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Electronic Data Log

Our Orange County techs quickly troubleshoot and correct issues found in your vehicle’s data log systems.

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Oil & Filter / Lubrication

Get the cheapest oil change in Orange County with our mobile service—no shop visit needed.

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Brake Repair Orange

Need brake repair in Orange County? We offer responsive, safety-first solutions that keep you rolling.

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EGR Filter Cleaning

Orange County diesel owners rely on us for fast, thorough EGR filter cleaning that restores engine efficiency.

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DPF Filter Cleaning

DPF filter cleaning in Orange County helps reduce emissions and avoid costly fines.

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Exhaust System Repair

Have exhaust issues? Our Orange County team fixes mufflers, emissions systems, and catalytic converters on-site.

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HVAC Systems Repair

Stay cool in the Orange County heat with professional HVAC repair for trucks and fleet vehicles.

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Engine Repair Orange

Is it time for your engine repair in Orange County? We handle complex diesel engine issues quickly and accurately.

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Suspension Repair

Chassis repair services in Orange County help extend the life of your heavy-duty truck and trailer.

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Engine Computer Diagnostics

Our Orange County diagnostic service finds and fixes issues fast using cutting-edge tools.

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Coolant System Repair

Avoid overheating in Orange County traffic with prompt coolant system repair from our mobile team.

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Clean Truck Check

We offer Clean Truck Check services in Orange County to keep your fleet compliant with CARB standards.

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Truck Parts & Accessories

Need parts in Orange County? We supply and install quality truck accessories and components on-site.

Hear From Our Satisfied Customer Testimonials.

With over 20 years of experience, you can count on us to provide the most effective solution to your truck, trailer, chassis, and heavy equipment needs.

Why Partner With Us?

At Precision Diesel in Orange County, we’re committed to delivering unbeatable value and exceptional service to every client in Orange County.

MOBILE REPAIR

Our mobile units come to you—saving time, towing costs, and getting your fleet back on the road faster.

ASE-CERTIFIED

Your vehicle is in expert hands with our certified professionals who ensure every repair meets the highest industry standards.

FAST Service

We prioritize speed without sacrificing quality, so your downtime stays minimal.

QUALITY PARTS

We use only top-tier components to ensure lasting performance and better ROI.

reliable

Our team shows up on time and delivers consistent results, so you can focus on running your business.

HONEST

We keep you informed at every step—no surprises, no upsells, just honest work you can rely on.

Your Full-Service Diesel & Auto Shop in Orange County

From oil changes and tire services to full engine overhauls and brake jobs, Precision Diesel is your one-stop diesel mechanic shop in Orange County. We’re proud to partner with top brands like Allison Transmission, Cummins Inc., Detroit Diesel, Mack Trucks, Peterbilt, Volvo, Western Star, Eaton, Freightliner, and more, and associations like SEMA and NHRA. Aspiring professionals can benefit from guidance at diesel mechanic school Orange County programs. We support students who want hands-on training and real-world experience in diesel repair. All services are backed by warranty and provided at honest, competitive prices. Whether you’re looking for diesel mechanic near me or need quick auto repair in Orange County, we’re here for you.

Recognized by many as the best diesel mechanic in Orange County, our team combines years of experience with advanced diagnostic tools to deliver top-quality service. Visit or call us today for dependable service with a smile.

Expert Heavy Duty Diesel Repair Services in Orange County

When your business depends on the performance of heavy-duty diesel trucks, you can’t afford downtime. That’s why fleet managers and owner-operators across Orange County trust our team for reliable heavy duty diesel repair and maintenance. Our shop specializes in comprehensive heavy-duty diesel repair services, including everything from routine inspections to complex heavy duty diesel engine repair. Whether you need fast turnaround for a breakdown or long-term service for a fleet, our certified heavy duty diesel mechanic technicians deliver expert solutions backed by years of hands-on experience.

As one of Orange County’s trusted heavy duty diesel repair shops, we understand the importance of precision diagnostics. That’s why we utilize advanced heavy duty diesel laptop scanner tool truck tuner diagnostic repair technology to pinpoint engine issues with speed and accuracy. From turbochargers to fuel systems, no problem goes unchecked. We have specialized diesel turbocharger mechanic Orange County CA services to improve engine performance and extend longevity for high-powered diesel vehicles. This investment in cutting-edge tools allows us to provide faster, more accurate assessments—reducing your vehicle’s time in the shop and getting you back on the road safely.

We’re also your go-to source for heavy duty diesel parts and repair, offering both OEM and high-quality aftermarket components. Our goal is to maximize performance and reliability, whether it’s a single service visit or ongoing fleet maintenance. If you’ve searched for heavy-duty diesel truck repair or heavy duty diesel repair near you, you’ve found the right place. Our centrally located Orange County facility makes it easy to access expert heavy duty diesel and truck repair shop without sacrificing time or quality.

From local operators to regional fleet owners, our customers rely on us for everything under the heavy duty truck and diesel repair umbrella. That includes drivetrain work, emissions systems, brake systems, and full heavy-duty diesel engine repair. Our heavy duty diesel mechanic team is equipped to service all major brands and models, ensuring every vehicle that enters our shop leaves in peak condition.

If you’re looking for dependable heavy duty truck & diesel repair Orange County CA, don’t wait until small issues become expensive problems. Call us today at 714-878-2571 or stop by to speak with a technician about your service needs. Trusted diesel mechanics Orange County CA, our team tackles repairs, maintenance, and fleet services with professional precision. Precision, performance, and professional service—that’s what sets our heavy duty diesel service repair apart in Orange County.

Why Precision Diesel?

We’re the trusted mobile truck, heavy-duty & trailer repair & fleet maintenance company that Orange County depends on. Customers choose us for quality, speed, and honest pricing—right where you need us. Our diesel mechanics in Orange CA provide expert repairs and routine maintenance for trucks, buses, and commercial vehicles, keeping local fleets running efficiently.
We offer easy towing options across Orange County to bring your vehicle to our shop.
Bring your truck in for a transparent second opinion—we’ll give you a fair, accurate estimate.
Every vehicle is test-driven by two technicians before delivery to ensure top performance.
Most of our repairs come with a strong warranty, giving Orange County customers peace of mind.
Improve fuel efficiency and reduce costly surprises with regular checkups.
Drop off your vehicle anytime—our lot has 24-hour surveillance for added security.
Stop by for a quick visual inspection—we’ll let you know if further diagnostics are needed.
We perform certified DOT inspections on-site anywhere in Orange County.
We stand behind our work and guarantee your satisfaction, every time.

Get In Touch

Call or text 714-878-2571. Or complete the form below for more information about our mobile diesel truck repair and fleet maintenance services Orange County​.
Contact Us Today
Need diesel truck repair or mobile fleet maintenance in Orange County? Precision Diesel is your best and most affordable choice for mobile truck, heavy-duty & trailer repair. Contact us today at 714-878-2571 or fill out our quick contact form to BOOK AN APPOINTMENT. We proudly serve all of Orange County with expert care and unbeatable convenience. Let’s keep your vehicles on the road and running strong.
Serving Orange County’s Diesel Needs — Wherever You Are

From the bustling Irvine Spectrum Center to the industrial parks of Santa Ana, we cover Orange County with precision. You’ll see our service trucks near South Coast Plaza, around the Anaheim Resort area, and along the 405, 55, and I-5 corridors. Whether you’re based in Huntington Beach, Garden Grove, or Mission Viejo, we’re just a call away. We support local fleets operating out of Orange County’s logistics hubs and business districts. Precision Diesel is your neighborhood’s diesel solution. In order to get a quote or schedule service, please give us a call at 714-878-2571.

Orange County is a region in Southern California. It’s known for Anaheim’s Disneyland Resort, a huge complex of rides, restaurants and shops. Nearby, in Buena Park, is Knott’s Berry Farm, a large theme park. Cities with surf beaches include Huntington Beach, with its surfing museum. Newport Beach’s boat-filled harbor sits opposite Balboa Peninsula. Laguna Beach has tide pools and oceanfront Crystal Cove State Park.

Serving Cities Across Orange County, including Aliso Viejo, Anaheim, Brea, Buena Park, Costa Mesa, Cypress, Dana Point, Fountain Valley, Fullerton, Garden Grove, Huntington Beach, Irvine, La Habra, La Palma, Laguna Beach, Laguna Hills, Laguna Niguel, Laguna Woods, Lake Forest, Los Alamitos, Mission Viejo, Newport Beach, Orange, Placentia, Rancho Santa Margarita, San Clemente, San Juan Capistrano, Santa Ana​, Seal Beach, Stanton, Tustin, Villa Park, Westminster, and Yorba Linda