Precision Diesel Repair
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Mobile Diesel Mechanics in Southern California

Mobile Diesel Truck & Semi Truck Repair + Fleet Maintenance in Southern California

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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.

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Keeping Your Fleets On The Road and Out Of The Shop

Why Precision Diesel?

Precision Diesel provides mobile heavy-duty diesel truck, semi truck, and trailer repair, along with fleet repair and maintenance services across Orange County, Los Angeles County, and Riverside County, & more!

Serving Los Angeles County, Orange County, Riverside County & Surrounding Areas

Our Story
replace truck battery

Mobile Repair Services in Newport Beach, CA

We Can Get You Moving Again!

Precision Diesel Repair Fleet Maintenance

Fleet Maintenance

On-site repairs for trucks, providing convenience and time savings. We offer complete fleet truck repair, including mobile diesel truck repair, ramp truck and truck service and repair for commercial and heavy-duty vehicles.
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emissions test

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 service trucks cover all of Southern California.
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diesel truck

Preventative Maintenance

Scheduled services to prevent breakdowns and prolong vehicle life

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Preventative Maintenance Provider in Newport Beac

FMCSA COMPLIANCE

Our professionals can help you maintain a high CSA score.

emergency diesel repair

DOT Inspection

Ensure vehicle compliance with safety standards and regulations.

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Diesel Technician Jobs: Key Duties and Skills

Bit Inspection

Our mobile service ensures your commercial motor vehicle (CMV) compliance without the need to visit a shop.

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Precision Diesel Repair Trailer Repair

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 shop-level work on the go.
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Precision Diesel Repair Heavy Equipment Repair

Heavy Equipment Repair

Maintenance and repair services for construction and heavy machinery.

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bit inspection Low Fuel Pressure Problem

Diagnostics & Check Engine

Computer diagnostics, check engine light scanning, and troubleshooting for trucks.
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Heavy Duty Truck winter tires

Chassis Repair

We are able to assess the damage and restore it to its original strength and stability.

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Our Mobile Truck Repair Sevices

GeneralDieselRepair

General Diesel Repair

Meet California's regulations, from brake system to tires

Electronic DataLog-

Electronic Data Log

Keep your So Cal fleet in compliance with our tailored ELD services

Oil

Oil & Filter / Lubrication

Regular oil changes and filter maintenance services including lubrication.

Brakes

Brakes Repair

Maintenance and repair of truck braking systems

EGR DPF

EGR Filter Cleaning

Maintenance for emission systems, including EGR and DPF units

EGR DPF

DPF Filter Cleaning

Maintenance for emission systems, including EGR and DPF units

Exhaust

Exhaust System Repair

Repair services for truck exhaust systems and components

GeneralDieselRepair

Clean Truck Check

Ensure CARB compliance through our certified emissions testing services

HVAC

HVAC Systems Repair

Heating, ventilation, and air conditioning repair services for trucks

Engine

Engine Repair

Comprehensive mobile engine repair services

Suspension

Suspension Repair

Maintenance and repair services for truck suspension systems

TruckPartsAccessories

Truck Parts & Accessories

Components for seamless trailer-truck performance

Electronic DataLog-

Engine Computer Diagnostics

Keep your engine healthy and in compliance with our diagnostics.

Coolant

Coolant System Repair

Services to maintain and repair truck cooling systems

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
At Precision Diesel, we provide expert mobile heavy-duty truck and trailer repair across Southern California, including areas near Los Angeles, Orange, and Riverside counties. Whether you need emergency roadside assistance or routine maintenance, our mobile service team is ready to keep your trucks running smoothly. Call us today at 714-878-2571 to schedule service or learn more.
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Los Angeles County
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Orange County
Freeway Service Patrol (FSP)
orange-and-los-angeles-county-freeways
In LA County, FSP covers almost every major freeway corridor, especially where traffic is heavy:

🔵 Core freeways (very consistent patrols)
  • 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
  • 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
  • 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:

🔵 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 we service
Allison_Transmission
Cummins
Detroit
International
Mack
Peterbilt
Volvo
Western Star
eaton
Freightliner
Our Mobile Truck Repair Services
With years of experience in commercial truck repair, our mobile diesel mechanics bring expert service directly to your site or roadside location. Whether it’s a mobile semi-truck repair, heavy duty truck repair, or fleet maintenance, Precision Diesel has you covered.

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!
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