Diagnostic & Repair Solutions
in Fontana

ABOUT

Fontana's Diesel Mechanics of Choice

RDR Diesel is a heavy-duty diesel diagnostic specialist that began consulting local heavy-duty repair shops in the Fontana area with diagnostic repairs and OEM programming procedures. To this day we still support local heavy duty diesel repair shops in electrical diagnosis and programming repair solutions. We have now expanded to offer direct to customers/fleet maintenance, diagnostic, and repair solutions.


If you have any questions about our services, don't hesitate to call us at 951 534 3952 or contact us online. We offer free diagnostic and repair quotes!

Our Services

Learn about a few of our most popular diesel services for medium and heavy duty trucks.

Preventative Maintenance

Our Preventative Maintenance services are designed to maximize equipment uptime, improve reliability, and reduce the risk of costly breakdowns. We perform scheduled inspections, fluid and filter changes, lubrication services, and comprehensive system checks to identify potential issues before they become major repairs.


By staying ahead of wear and maintenance needs, we help extend the life of your diesel truck or equipment and keep it operating at peak performance.

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Advanced Computer Diagnostics

Our Advanced Computer Diagnostics services utilize cutting-edge scan tools and OEM-level software to accurately assess today’s high-tech diesel engines and equipment.


We retrieve and analyze fault codes, monitor live data, perform system tests, and pinpoint complex performance issues that basic diagnostics can miss. By identifying the root cause quickly and precisely, we reduce guesswork, minimize downtime, and ensure efficient, reliable repairs the first time.

Request a Quote

Advanced Computer Diagnostics

Our Advanced Computer Diagnostics services utilize cutting-edge scan tools and OEM-level software to accurately assess today’s high-tech diesel engines and equipment.


We retrieve and analyze fault codes, monitor live data, perform system tests, and pinpoint complex performance issues that basic diagnostics can miss. By identifying the root cause quickly and precisely, we reduce guesswork, minimize downtime, and ensure efficient, reliable repairs the first time.

Request a Quote

We offer this and so much more for your truck.

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Why Choose Us?

Prompt Service

Every second without your truck on the road is money lost. That's why RDR works hard to get you back on the road fast.

Advanced Tools

If your truck's in serious trouble, it's time to take it to a pro. We have the diagnostic tools that'll find the problem.

Friendly Support

We'll let you know what's going on with your truck every step of the way. We'll also listen to your concerns.

Let People Know

If you have a good experience, please let your friends know that we're Fontana's diesel mechanic of choice!

Let's get you back on the road.

We’re here to help you drive safely and smoothly. We’ll ensure that your diesel truck gets the highest-quality service possible.
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Quality Service

If you're having trouble with your diesel truck, you want to bring it to a quality mechanic.

Great Prices

We work to keep our services as affordable and insurance-friendly as possible.

Expert Mechanics

Trust your truck with professionals that have the experience to make it right. No matter the problem, we'll find the solution.

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Call us or fill out our online form to get a free, no-commitment quote.

FREE QUOTE

Let us know about your problem, so we can give you a free quote!

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Customer Reviews

"I like the quality of work. Very professional."

InLog Inc

"Always professional and always getting the job done!"

Franklin Mejia

Good service!

MJM Transport LLC