Same-Day Mobile Diesel Repair in Southern California

When diesel equipment goes down, delays cost money, schedules fall apart, and loads get missed.  California Mobile Fleet provides same-day mobile diesel repair for semi-trucks, big rigs, commercial fleets, and diesel powered vehicles throughout Southern California. Our mobile diesel mechanics come directly to your location to diagnose and repair problems on site whenever possible, reducing downtime and keeping your operation moving.

This service is designed for urgent breakdown situations where you need a qualified diesel mechanic quickly without waiting days for a shop appointment or paying unnecessary towing fees

Professional Mobile Diesel Mechanics are On Site When You Need It

Mechanical failures don’t always happen near a repair facility. Whether your truck is disabled on the roadside, at a distribution center, job site, yard, or parking lot, our mobile diesel repair service brings the tools, diagnostics, and experience directly to you.

Our approach focuses on accurate diagnostics, efficient repairs, and safe operations. We work quickly but never cut corners, ensuring repairs are completed correctly and in compliance with California regulations.

Advanced Diesel Diagnostics and On Site Repairs

Today’s diesel engines rely on complex electronic and emissions systems. Guesswork leads to wasted time and unnecessary parts replacement. Our service trucks are equipped with professional diagnostic equipment and manufacturer level software that allows us to pinpoint issues accurately on the first visit.

We provide mobile diagnostics and repair support for diesel powered vehicles including:

• Semi-trucks and big rigs
• Commercial fleet vehicles
• Medium and heavy-duty work trucks
• RVs and motorhomes

By diagnosing issues on site, we’re able to resolve many breakdowns without the need to transport the vehicle to a shop saving valuable time and money.

Diesel Engines, Transmissions, and Systems We Service

California Mobile Fleet supports a wide range of diesel platforms commonly used across the trucking and fleet industries. Our mobile diesel repair services cover engines from manufacturers including Mack, Volvo, Detroit, International, Cummins, PACCAR, Hino, and Isuzu.

We also provide repair and diagnostic support for Allison and Eaton transmission systems, as well as drivetrain components such as clutches and rear end assemblies. Our technicians understand how these systems work together, allowing us to address the root cause of failures rather than just the symptoms.

After-Treatment and Emissions System Repairs

Emissions related faults are one of the most frequent causes of breakdowns in California. Issues within DPF, DEP, and SCR systems can quickly lead to derates or vehicles being placed out of service.

Our mobile diesel repair service includes on site diagnostics and repairs for after treatment systems, helping drivers and fleet managers address warning lights, fault codes, and performance issues while staying compliant with CARB Clean Truck requirements. When needed, we also assist with clean truck inspection readiness to reduce the risk of violations.

Same Day Repairs That Help Avoid Towing

Not every breakdown requires a tow. Our goal is always to complete repairs at your location when it is safe and practical to do so. On site repairs  often saves significant time and expense compared to transporting a disabled vehicle to a repair shop. 

If a repair cannot be completed on site, we coordinate towing services to ensure your vehicle is transported safely and efficiently for further service and repairs.

Mobile Diesel Repair for Fleets and Owner-Operators

We work with both fleet operators and independent truck owners who rely on dependable service during time sensitive breakdowns and situations. Fleet managers benefit from responsive communication, accurate diagnostics, and detailed repair documentation, while owner operators receive straightforward service focused on getting them back on the road as quickly as possible.

Our mobile diesel repair services are built on reliability, transparency, and long term support.

Why Choose California Mobile Fleet for Your Mobile Diesel Repair?

Choosing the right mobile diesel repair provider makes a measurable difference in downtime, repair quality and overall operating costs. California Mobile Fleet is committed to delivering dependable and exceptional service backed by experience across multiple diesel platforms and applications.

Our focus is on quality workmanship, accurate diagnostics, and fast response times, giving drivers and fleet operators confidence when urgent mechanical problems arise.

Request Same Day Mobile Diesel Repair

If your truck, fleet vehicle or RV needs immediate attention, California Mobile Fleet is ready to help. Our same day mobile diesel repair services are available for roadside breakdowns, job sites, yards, and fleet locations throughout Southern California.

Contact us today to request service and get your truck or RV back in operating condition as quickly and safely as possible.