Diesel Repair in Wauwatosa, WI

When your diesel truck is on the fritz, it can disrupt your entire schedule, leaving you scrambling for a reliable solution. Wauwatosa’s dedicated drivers know they can turn to Ryan's Diesel Service, where we specialize in everything from engine overhauls and fuel system upgrades to drivetrain repairs and DOT inspections. Our expert team is well-versed in servicing newer diesel trucks, ensuring that your vehicle runs smoothly and efficiently. For those moments when you can’t make it to us, our mobile service truck is ready to provide on-site assistance for minor repairs. At Ryan's Diesel, we combine quality workmanship with a commitment to customer trust, making sure you’re back on the road with confidence.

High End Diesel Products Is Our Specialty

Ryan’s Diesel Service is no stranger when it comes to the manufacturing of high-end diesel products.

Learn more about us HERE

Warranties on Our Turbos

Outlined on product pages and HERE

All Turbos Are Manufactured in House

We believe all products should be manufactured in-house to maintain high levels of quality control.

Our Customers Love Us

Over 100 Reviews on google with a 5 star rating. View HERE

High End Machining

We currently have a HAAS VF4 5-axis machining center which runs a fair majority of our products. We also have a HAAS TL-1 lathe.

Turbo balancing is all done in-house on either our West Coast Balancer WCB30 or CWT industries balancer.

Diesel Repair Services – Your Trusted Diesel Repair Shop in Wisconsin

At Ryan’s Diesel Service, we specialize in comprehensive diesel repair and maintenance for light and medium-duty diesel trucks and vehicles. With over 15 years of experience serving Southeastern Wisconsin, our ASE-level technicians deliver honest diagnostics, dependable repairs, and performance-driven service you can count on.

Whether you’re dealing with a hard-to-diagnose engine issue or need routine diesel system maintenance, our team has the expertise and equipment to keep your diesel running strong.

What We Repair

We provide a full suite of diesel repair services, including:

  • Engine and Drivetrain Repair
  • Diesel engine diagnostics and repair
  • Fuel system service, tuning, and injector replacement
  • Turbocharger replacement, rebuilds, and upgrades
  • Engine swaps and rebuilds

Diesel Performance & Upgrades

  • Performance enhancements and tuning
  • Drop-in turbos and custom builds
  • Power delivery optimization

Suspension, Transmission & More

  • Transmission diagnostics and repair
  • Suspension and drivetrain upgrades
  • Electrical system troubleshooting

Advanced Diagnostics

Our shop uses state-of-the-art tools to pinpoint performance issues fast- saving you time and money on unnecessary repairs.

Why Choose Ryan’s Diesel Service?

As a locally owned business in Wauwatosa, Ryan's Diesel Service understands the unique needs of the community and is deeply committed to providing tailored support for diesel vehicle owners. With years of experience in the industry, our skilled technicians specialize in a wide range of services, from engine overhauls and head gasket replacements to modern fuel system upgrades using Airdog and FASS systems. We excel in servicing newer diesel trucks, ensuring that every component, such as turbochargers for both stock and racing applications, meets the highest standards of performance. Additionally, our mobile service truck allows us to come directly to you, making simple repairs hassle-free right at your location. We also conduct comprehensive Department of Transportation (DOT) inspections, ensuring complete compliance for your vehicle. At Ryan's Diesel Service, we prioritize your satisfaction, offering a warranty on our workmanship and parts to ensure your peace of mind with every service.

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