About Our Company

Clean Diesel Specialists, SoCal

Keeping Fleets Compliant for 15+ Years

At Clean Diesel Specialists, we are more than just an emissions testing provider—we are your partner in CARB compliance. With over 15 years of experience, we have helped thousands of diesel truck owners and fleet operators stay compliant with California’s stringent emissions regulations.

We work with individual truck owners, fleet managers, and major corporations, ensuring their vehicles meet CARB’s Heavy-Duty Inspection and Maintenance (HD I/M) program requirements. Our expert team, statewide service, and one-stop compliance solutions make it easy to navigate the ever-changing landscape of emissions regulations.

Our Mission

To provide fast, reliable, and expert emissions compliance services that keep trucks on the road, fleets running efficiently, and businesses free from costly fines.

We believe that compliance shouldn’t be complicated—our team is here to make the process as seamless as possible.

What Sets CDS, SoCal Apart?

The Experts in the
Diesel Compliance Industry

We specialize in CARB testing, compliance solutions, and regulatory guidance. Our team stays ahead of policy updates to keep your trucks road-ready and compliant.

Statewide, Mobile &
On-Site Testing

Our mobile units bring emissions testing to you, whether you’re managing a large fleet or an individual truck. No downtime, no hassle.

More Than Just a Test –
Full Compliance Support

We don’t just test your vehicle, we help you understand any compliance issues and guide you through the necessary repairs or re-testing to get you certified.

Trusted by Top Fleets

From owner-operators to Fortune 500 companies, we work with some of the largest fleets and California’s busiest ports, ensuring emissions compliance at every level.