Diesel engines are workhorses — and like any hard-working machine, they require knowledgeable, specialized service. At Hahn Automotive in Santa Rosa, we've built a strong reputation for diesel truck and vehicle repair throughout Sonoma County.
We service all major diesel platforms including Ford Power Stroke (6.0L, 6.4L, 6.7L), GM Duramax, Ram Cummins, Volkswagen TDI diesels, and diesel-powered commercial vehicles and trucks. Our technicians understand the unique requirements, common failure points, and performance characteristics of each diesel platform.
From fuel injection and turbocharger service to EGR cleaning, DEF system repair, and glow plug replacement, we have the tools and expertise to keep your diesel running strong.
Signs You Need Diesel Repair
Our Process
Diesel-Specific Diagnostics
We use diesel-specific scan tools and test procedures to accurately diagnose your engine's issue.
Fuel System Testing
We test injector performance, fuel pressure, and pump output to identify any fuel delivery issues.
Turbo & Emissions Inspection
We inspect your turbocharger, EGR system, DPF filter, and DEF system for proper function.
Expert Repair
Our diesel-experienced technicians complete all repairs to specification, using quality parts appropriate for your diesel's demands.
Why Choose Hahn Automotive?
Diesel Experience
We've worked on diesel trucks and vehicles throughout our 55+ years in Santa Rosa. We know these engines.
All Major Platforms
Power Stroke, Duramax, Cummins, TDI — we have the tools and knowledge for every major diesel platform.
Save vs. Dealership
Dealer diesel service comes with dealer pricing. We provide the same quality diagnosis and repair for significantly less.
Work Trucks Welcome
We understand your diesel is often your livelihood. We communicate clearly and work efficiently to minimize your downtime.