Manufacturer Repair | Ontario CA
Freightliner Repairin Ontario, CA.
At Rapid Diesel Repair, we offer comprehensive services for heavy-duty trucks, trailers, and RVs in Ontario, CA. From preventative maintenance to diagnostics, we keep your vehicles running efficiently. Call us to learn more about our expert solutions.
Truck owners trust Rapid
What’s included
What does it include?
A Freightliner that loses power, shows a warning light, or develops a brake problem can put a delivery or an entire route on hold. At Rapid Diesel Repair in Ontario, CA, we diagnose and repair Freightliner trucks for fleet operators and owner-operators who need clear answers and dependable service.
Freightliner Diesel Diagnostics and Engine Repair
A check engine light, hard start, rough running, or loss of power can have several causes. We diagnose the problem before recommending a repair, whether it involves the engine, fuel system, cooling system, or an electrical fault.
CALL RAPID DIESEL(909) 701 8755Talk with a diesel repair specialistDEF, DPF, and Emissions System Repairs
If your Freightliner has a DEF warning, repeated regeneration issue, or reduced-power condition, our technicians can inspect the aftertreatment system and diagnose the fault. We service diesel particulate filter (DPF) and selective catalytic reduction (SCR) system issues rather than treating every warning as the same repair.
CALL RAPID DIESEL(909) 701 8755Talk with a diesel repair specialistAir Brake Repair and Fleet Maintenance
Reliable brakes and routine service matter on every trip. We inspect and repair air brake components and provide preventative maintenance to help catch wear before it causes unplanned downtime.
CALL RAPID DIESEL(909) 701 8755Talk with a diesel repair specialistWe work on Freightliner Cascadia, M2 106, and 122SD trucks. Whether you need an urgent diagnosis or scheduled fleet service, call Rapid Diesel Repair to tell us what your truck is doing and arrange a visit to our Ontario shop.
Our process
A clearer path to a fix.
Scan & Analyze
We use advanced diagnostic tools to read codes, live data and system tests.
Find the Real Fault
We go beyond code definitions to identify the true root cause.
Explain & Recommend
We walk you through the issue and repair options before any work begins.
What makes us different
Diesel expertise. Real results.
Based in Ontario, CA, Rapid Diesel Repair is a full service diesel shop focused on accurate diagnostics and dependable repairs.
Experienced Technicians
Hands on experience with diesel trucks and fleet vehicles.
Advanced Diagnostics
We pinpoint problems accurately to minimize downtime.
Quality Parts
Durable components for long lasting repairs.
Clear Communication
We explain the repair and price before work begins.
FAQ
Frequently asked questions
We work on Freightliner trucks including the Cascadia, M2 106, and 122SD. Tell us your truck's year, model, and engine when you call so we can prepare for the right service.
Yes. DEF warnings and reduced-power conditions usually trace back to the aftertreatment system. We inspect the DPF and SCR components, diagnose the actual fault, and explain the repair before any work begins.
Yes. We build scheduled preventative maintenance around how your trucks operate, including air brake inspections, to catch wear before it causes unplanned downtime.
We work on light, medium and heavy duty diesel trucks, fleet vehicles, trailers and RVs, including Freightliner, International, Peterbilt, Kenworth, Volvo, Mack, Hino, Isuzu, Ford Power Stroke, Ram Cummins and GM Duramax.
It depends on the truck, the parts and what we find. We diagnose first, then explain the repair options and the price before any work begins, so there are no surprises. Call, text or use the form to get started.
Calling ahead is best so we can plan bay time and parts. If your truck is down, call (909) 701-8755 and we will tell you the fastest way to get it in.
Ready to get answers?
Let’s fix it right.
Accurate diagnostics. Honest answers. Get back on the road faster.