Mobile Diesel Truck Repair in Los Angeles County, CA
Call today for a schedule of services and rates: 714-878-2571
Expert Diesel Engine Repair & Mobile Services in Los Angeles County
Deep Roots in Los Angeles County, Committed to Your Satisfaction
Full-Service Diesel and Fleet Repairs in Los Angeles County
Our Diesel Services

Fleet Maintenance
Fleet operators in Los Angeles County trust us for dependable fleet maintenance that minimizes downtime and boosts ROI. We keep your trucks on the road and compliant—saving you money and stress.

Roadside Assistance
Need emergency roadside assistance in Los Angeles County? Our mobile diesel techs are on-call to handle breakdowns fast, from downtown LA to remote areas in the county.

Preventative Maintenance
Need preventative maintenance in Los Angeles County? We’ll help extend the life of your diesel vehicle with scheduled inspections, fluid changes, and performance checks.

Compliance Inspections
Los Angeles County fleet services rely on us for FMCSA compliance inspections to ensure safety and avoid costly violations.

DOT Inspection LA County
If your truck or trailer operates in or out of Los Angeles County, DOT inspections from our certified mobile mechanics keep you road-legal and running safe.

Belt Inspection LA County
Operating in Los Angeles County? Our technicians can quickly assess and replace worn or damaged belts to prevent major repairs.

Trailer Repair LA County
Looking for mobile trailer repair in Los Angeles County? From brakes to lighting, our trailer repair service keeps your equipment compliant and operational.

Heavy Equipment Repair
Heavy equipment repair in Los Angeles County is just a call away—whether it’s a skid steer, loader, or forklift, we’ve got the tools and expertise.

Chassis Repair LA County
Fleet truck service in Los Angeles County, CA often includes chassis repair—our mobile team handles it with precision and speed on-site.
Our Diesel Repair Services

General Diesel Repair
Is it time for general diesel repair in Los Angeles County? Our team delivers quick, professional repairs that get your diesel vehicle back on the road.

Electronic Data Log
Los Angeles County fleets depend on accurate electronic data logging—we troubleshoot and fix issues to keep your ELDs compliant.

Oil & Filter / Lubrication
Need an oil change in Los Angeles County? We offer fast, mobile oil & filter service that keeps your engine running smooth.

Brake Repair LA COUNTRY
Brake repair in Los Angeles County is critical for safety—we replace pads, lines, and more on-site for maximum convenience.

EGR Filter Cleaning
Avoid performance issues with our mobile EGR filter cleaning in Los Angeles County—trusted by truck owners across the region.

DPF Filter Cleaning
Need DPF filter cleaning in Los Angeles County, CA? Our mobile equipment restores filter performance and reduces costly downtime.

Exhaust System Repair
Los Angeles County diesel vehicles need strong exhaust systems—our team handles leaks, replacements, and upgrades with care.

HVAC Systems Repair
Get back to comfort with HVAC system repair in Los Angeles County—especially crucial for drivers operating in SoCal’s heat.

Engine Repair Los Angeles
Diesel engine and fuel system repair in Los Angeles County, CA is one of our specialties. Let our ASE-certified team get you back to work.

Suspension Repair
Suspension issues in Los Angeles County? We provide mobile suspension repairs that restore ride quality and stability.

Engine Computer Diagnostics
Our advanced engine computer diagnostics in Los Angeles County pinpoint issues fast—saving you time and guesswork.

Coolant System Repair
Keep your engine cool with fast coolant system repair in Los Angeles County. Avoid overheating and expensive repairs.

Clean Truck Check
Stay ahead of California regulations with Clean Truck Check services available throughout Los Angeles County.

Truck Parts & Accessories
Looking for truck parts in Los Angeles County? We offer on-site delivery and installation of top-quality OEM and aftermarket parts.
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.
EXCELLENT Based on 9 reviews Posted on Michael BowlesTrustindex verifies that the original source of the review is Google. Will not hesitate to use Precision Diesel again. Their response was fast, professional and affordable. Thanks for helping me out.Posted on Chuy SilvaTrustindex verifies that the original source of the review is Google. Fast service 👍🏽👍🏽👍🏽👍🏽Posted on Dave HubertTrustindex verifies that the original source of the review is Google. So far, all good, little hiccup with resent full servicing on my Allison transmission... It still shows "CHECK TRANS" when I start the truck which it has never done before...When engine running, and driving, check trans light goes off???? guess all is ok so far!Posted on allex reddinTrustindex verifies that the original source of the review is Google. Timely and showed attention to detail. Very pleased with the service reasonable pricesPosted on vinicio delcidTrustindex verifies that the original source of the review is Google. Precision diesel Mobil is a great maintenance Mobil service that has you’re back at anytime if your stuck anywhere. I was stuck on the road with my heavy duty tow truck and they swooped in on time and helped fix the issue to be on my way to continue my business for that day. I highly recommend these guys for any of your heavy duty needs.Posted on Ken ChangTrustindex verifies that the original source of the review is Google. Precision Diesel helped us when one of our heavy duty trucks broke down. They were quick efficient and professional. I hope not to need them in the future, but if I do, I will definitely call them again for mobile heavy duty truck repair.
What Makes Precision Diesel the Smart Choice?
MOBILE REPAIR
We bring our repair shop to you—wherever you are in Los Angeles County.
Local
We understand the needs of Los Angeles County businesses and drivers better than anyone.
FAST Services
We use cutting-edge tools to identify and resolve issues fast.
Pricing
Fair, transparent quotes—no hidden fees or upsells.
Fleet Experts
We help local fleet operators stay compliant, efficient, and on the road.
Reliable
On-time appointments mean less downtime and no surprises.
Full-Service Diesel & Auto Repair Shop in Los Angeles County
Heavy-Duty Diesel Repair Services in Los Angeles County
Our certified heavy duty diesel mechanic technicians are trained to handle all types of issues, including heavy duty diesel engine repair, brake systems, emissions, fuel systems, and aftertreatment. Using advanced laptop scanner tool truck tuner diagnostic repair technology, we can quickly pinpoint problems and provide accurate solutions, reducing unnecessary delays and repeated visits. This state-of-the-art equipment allows us to deliver high-quality heavy-duty diesel repair services that meet OEM standards and get your vehicles back on the road with confidence.
As a local leader in heavy duty diesel repair, we proudly serve commercial drivers searching for heavy-duty diesel truck repair near me and heavy duty diesel repair near me throughout the greater Los Angeles County area. Whether you’re experiencing performance issues with your engine or need urgent roadside assistance, our team is equipped to handle it all. From full-scale heavy-duty diesel truck repair to regular maintenance and inspections, we’ve built our reputation on reliability, transparency, and unmatched technical skill.
With years of experience in heavy duty truck and diesel repair, we understand the unique needs of the trucking industry. Our facility is staffed with highly skilled heavy duty diesel mechanics who specialize in both modern diesel systems and older models. From fleet maintenance contracts to one-off service needs, we provide solutions that extend the life of your equipment while helping you avoid costly breakdowns.
If you’re searching for trusted heavy duty diesel repair shops in Los Angeles County, look no further. Our commitment to quality, fast service, and customer satisfaction makes us the preferred choice for heavy duty diesel and truck repair. Call now at 714-878-2571 or visit our shop to schedule your next service—your trucks deserve nothing less than the best.
Why Choose Precision Diesel?
Towing Available
Free Second Opinion
Quality Control
Warranty
Preventive Maintenance Services
After Hours Drop-Off
Free 15-Minute No-Wrench Inspection
DOT Inspections
Satisfaction Guaranteed
Get In Touch
Book Your Appointment Today
Contact us today at 714-878-2571 or use our online form to BOOK AN APPOINTMENT. We’ll come to your job site, yard, or roadside—saving you time, money, and stress. Let us help keep your trucks running like new with expert, local service you can trust.
Deep Roots in Los Angeles County, Committed to Your Satisfaction
We serve cities across Los Angeles County, including Artesia, Azusa, Baldwin Park, Bell, Bell Gardens, Bellflower, Carson, Cerritos, Claremont, Commerce, Compton, Covina, Cudahy, Culver City, Downey, El Monte, El Segundo, Gardena, Hawaiian Gardens, Hawthorne, Hermosa Beach, Huntington Park, City of Industry, Inglewood, Irwindale, La Habra Heights, La Mirada, La Puente, La Verne, Lakewood, Lawndale, Lomita, Long Beach, Los Angeles, Lynwood, Manhattan Beach, Maywood, Monrovia, Montebello, Monterey Park, Norwalk, Paramount, Pasadena, Pico Rivera, Pomona, Redondo Beach, Rolling Hills, Rolling Hills Estates, Rosemead, San Dimas, San Gabriel, Santa Fe Springs, Santa Monica, Signal Hill, South El Monte, South Gate, South Pasadena, Temple City, Torrance, Vernon, Walnut, West Covina, West Hollywood, Whittier