Diesel specialists since 1948. Automotive, Marine, Industrial.

United Diesel Service provides diesel fuel injection parts, performance parts, component testing and rebuilding for automoitive, marine and industrial applications. Plus, we offer complete drive-in repair services for all diesel-powered vehicles - from a simple oil change to a complete engine rebuild. 

Our highly trained technicians have decades of hands-on experience trouble-shooting and repairing all makes and models of diesel engines. We use the latest digital scanners (Snap On Solus,Tech II and OB2) – to quickly diagnose and repair your engine.

We are a Bosch Certified Repair Center and an authorized dealer for: Ambac, Alliant Power, Bosch, Delphi/CAV, Denso, Deutz, Isuzu, Lucas, Nippondenso, Stanadyne, and Zexel.

Opened in 1948, our family owned business continues to deliver superior customer satisfaction throughout Southern California. 

Call us with your diesel engine questions at 626.579.4832. We have fully trained technicians on staff to quickly diagnose your engine performance problems, make all necessary repairs and get you up and running – as quickly and cost-effectively as possible.

Repair estimates can usually be turned around in 24 hours.