Heavy-Duty Diesel Mechanic Services in Bakersfield, CA

What Makes Delaney & Ahlf Diesel Service Different?

Our experienced team is equipped to handle everything from preventive maintenance to complex repairs, and we pride ourselves on transparent pricing and top-tier customer service. Our services include federal DOT inspections, California state BIT inspections, RV repairs, and welding and fabrication services.

Whether you’re an owner-operator or managing a fleet, we've got everything you need to keep your vehicles running smoothly, efficiently, and safely.

Here’s what sets us apart

Decades of Expertise: Serving the industry since 1959, we bring over 60 years of knowledge to every service.

15 Spacious Bays: We can accommodate fleets of all sizes with ease.

World-Class Customer Service: Transparent pricing, clear communication, and expertise in sourcing hard-to-find parts are the cornerstones of our approach.

Frequently Asked Questions

What Areas Do You Serve for Diesel Services?

We serve Bakersfield, CA, and nearby cities, including Oildale, CA; Lamont, CA; Arvin, CA; Shafter, CA; Wasco, CA; Taft, CA; Delano, CA; Tehachapi, CA; Porterville, CA; Lindsay, CA; Corcoran, CA; Mojave, CA; California City, CA; Rosamond, CA; Lake Isabella, CA; Ridgecrest, CA; Buttonwillow, CA; McFarland, CA; Boron, CA; Frazier Park, CA; Lebec, CA.

What is the Difference Between a DOT and BIT Inspection?

A DOT inspection ensures compliance with federal safety standards, covering vehicle safety and operation. A BIT inspection (Basic Inspection of Terminals) is specific to California and evaluates a fleet’s maintenance practices and vehicle safety to comply with state regulations.

How Often Does a Bus Need to Be Inspected in California?

Buses in California must be inspected every 90 days or every 45 calendar days, whichever comes first, based on their operational use. This ensures compliance with state safety standards. If a bus is out of service for over 45 days, it must be inspected before returning to operation.

How Often Should I Schedule Preventive Maintenance for My Fleet?

We recommend scheduling preventive maintenance every 10,000–20,000 miles or as outlined in your vehicle’s service manual. Regular maintenance minimizes the risk of unexpected breakdowns and prolongs the life of your fleet.

How Can I Get Diesel Services?

Getting started is easy. Call us at 661-322-5064 today to schedule your service or discuss your fleet’s needs. Delaney & Ahlf Diesel Service Inc. is here to keep you moving forward.