Mobile Diesel Mechanics & Fleet Repair in Southern California
Precision Diesel is your go-to mobile fleet maintenance provider in Los Angeles County, Orange County, Riverside County & surrounding areas. From Group 31 batteries to Glad Hands and airlines, we deliver quality OEM and aftermarket parts with unmatched convenience.
Mobile Diesel Truck & Semi Truck Repair + Fleet Maintenance in Southern California
Why Precision Diesel?
Serving Los Angeles County, Orange County, Riverside County & Surrounding Areas
Commercial Fleet Maintenance & Emergency Roadside Service in Southern California
We Can Get You Moving Again!
Fleet Maintenance
On-site repairs for trucks, providing convenience and time savings. We offer complete fleet maintenance and truck repair, including mobile diesel truck repair, ramp truck and truck service and repair for commercial and heavy-duty vehicles throughout Southern California.
Roadside Assistance
Emergency repair services for trucks stranded on the road. 24/7 roadside truck repair near you for breakdowns or engine failure. Our mobile diesel service trucks cover all of Southern California.
Preventative Maintenance
Scheduled preventative maintenance services to prevent breakdowns and prolong the life of your commercial and heavy-duty vehicles.
FMCSA COMPLIANCE
Our professionals can help you maintain a high CSA score and stay compliant with FMCSA regulations.
DOT Inspection
Ensure your commercial vehicle stays compliant with DOT safety standards and regulations.
Bit Inspection
Our mobile service helps ensure your commercial motor vehicle (CMV) stays compliant with California BIT inspection requirements without the need to visit a shop.
Trailer Repair
Repair and maintenance services for all types of trailers. Our techs handle truck trailer repair, mobile semi-trailer repair, and tractor-trailer repair with shop-level service on the go.
Heavy Equipment Repair
Maintenance and repair services for construction equipment, heavy machinery, and commercial vehicles.
Diagnostics & Check Engine
Computer diagnostics, check engine light scanning, and troubleshooting for diesel trucks and heavy-duty vehicles.
Chassis Repair
We are able to assess chassis damage and restore your truck or commercial vehicle to its original strength and stability.
Our Mobile Truck Repair Sevices
General Diesel Repair
Meet California's regulations, from brake system to tires
Electronic Data Log
Keep your So Cal fleet in compliance with our tailored ELD services
Oil & Filter
Regular oil changes and filter maintenance services including lubrication.
Brakes Repair
Maintenance and repair of truck braking systems
EGR DPF Filter Cleaning
Maintenance for emission systems, including EGR and DPF units
Exhaust System Repair
Repair services for truck exhaust systems and components
Clean Truck Check
Ensure CARB compliance through our certified emissions testing services
HVAC Systems Repair
Heating, ventilation, and air conditioning repair services for trucks
Engine Repair
Comprehensive mobile engine repair services
Suspension Repair
Maintenance and repair services for truck suspension systems
Truck Parts & Accessories
Components for seamless trailer-truck performance
Engine Computer Diagnostics
Keep your engine healthy and in compliance with our diagnostics.
Coolant System Repair
Services to maintain and repair truck cooling systems
Heavy-Duty Truck Services Across Southern California
Our team provides a full range of heavy duty truck diesel services throughout Los Angeles, Orange County, and Riverside County. From preventative maintenance and diagnostics to emergency breakdown assistance, we help keep commercial vehicles operating safely and efficiently. When businesses need a dependable heavy truck diesel mechanic company, they rely on experienced mobile technicians who can respond directly to the job site.
Heavy-Duty Truck Repair
We handle professional heavy-duty truck repair for fleets, owner-operators, and commercial vehicles experiencing engine, transmission, brake, electrical, or suspension issues.
Heavy-Duty Truck Roadside Service
Unexpected breakdowns can happen anywhere. Our heavy-duty truck roadside service team responds throughout major freight corridors, including I-5, I-405, I-710, SR-91, and the Inland Empire, helping reduce downtime and get trucks back on the road quickly.
Heavy Equipment Repair
In addition to truck repairs, we provide heavy equipment repair for construction and industrial equipment operating across Southern California job sites.
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.
Areas We Service
- Los Angeles County
- 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
Freeway Service Patrol (FSP)
🔵 Core freeways (very consistent patrols)
A lot of drivers break down on these routes and end up looking for a heavy duty diesel mechanic near them while stuck in traffic on the shoulder.
I-5 (Golden State / Santa Ana)
I-10 (Santa Monica Freeway)
I-110 (Harbor Freeway)
I-405 (San Diego Freeway)
US-101 (Hollywood / Ventura Freeway)
These are some of the busiest in the country, so FSP presence is very common.
🟢 Major connectors & regional routes
We also regularly get calls from fleets needing a mobile diesel mechanic near these connector routes when trucks can’t make it back to a shop.
I-210 (Foothill Freeway)
I-605 (San Gabriel River Freeway)
I-710 (Long Beach Freeway)
SR-60 (Pomona Freeway)
SR-91 (Artesia Freeway)
🟡 Secondary but still covered corridors
These areas still see plenty of breakdowns where drivers end up searching for diesel truck repair near services while trying to stay on schedule.
SR-134 (Ventura Freeway)
SR-118 (Ronald Reagan Freeway)
SR-170 (Hollywood Freeway)
SR-57 (Orange Freeway—shared with OC)
These usually have patrols, but sometimes fewer than the core routes. FSP is focused on the main commuting corridors: It’s also pretty common for stranded drivers on these routes to need a diesel truck mechanic quickly before traffic builds up even more.
🔵 Primary freeways (most reliable)
I-5 I-405 SR-55 (Costa Mesa Freeway) SR-91 These are some of the busiest in the country, so FSP presence is very common.
🟢 Additional covered routes
SR-57 SR-73 (toll road — limited segments/times)
Manufacturers and Vehicles We Service & Repair
- Capacity Truck
- Freightliner Truck
- Hino Truck
- International Truck
- Isuzu Truck
- Kalmar Truck
- Kenworth Truck
- Mack Truck
- Mercedes Truck
- Peterbilt Truck
- Volvo Truck
- Western Star Truck
- Allison Transmission
- Detroit
- Eaton
- Paccar Truck
- Cummins
Our Mobile Truck Repair Services
Providing mobile service throughout Southern California, Precision Diesel and automotive is the #1 choice for onsite mobile heavy duty truck repair and maintenance services in Los Angeles County, Riverside County, Orange County & more! From diesel engine repair services and exhaust system maintenance, to brake repair and suspension service, Precision Diesel can get you moving again! For top-rated commercial mobile truck repair services, call us today!