Family Owned & Operated · Titusville, FL
Diesel down? We get you back on the road.
On Demand Diesel Repair is a family owned truck repair shop in Titusville, Florida. We work on light, medium and heavy duty diesels, RVs and diesel equipment, with a focus on engine and chassis repairs done right the first time.
What We Work On
Engine & Chassis Specialists
The Service Sheet
From the first fault code to the final road test, here is what comes through our bays every week. Don't see your problem listed? Call us. If it runs on diesel, we can take a look.
Diagnostics
- Diagnostic inspection to identify the cause of concern
- Electrical diagnostics for wiring, circuits and components
- Computer scan and fault code retrieval from the ECM and related modules
Engine & Cooling
- Alternator / generator removal and replacement
- Fan clutch assembly replacement
- Cooling system service, coolant condition and leak checks
- Thermostat replacement
- Water pump replacement
Fuel System
- Fuel system diagnostics
- Fuel filter replacement
- Drain and flush fuel system (misfueling repair)
- High pressure fuel pump replacement
Air & Induction
- Air filter replacement
- Turbocharger inspection
- Turbocharger replacement
A/C System
- A/C system diagnostics
- A/C compressor replacement
- Evacuate and recharge A/C system
- A/C condenser and evaporator replacement
Charging & Starting
- Battery test and inspection
- Starter replacement
- Alternator replacement
Maintenance
- Preventative maintenance inspection (PM service)
- Oil and filter service
- Fuel filter service
- Complete multi-point inspection
- DOT and annual inspections
Need something on this sheet?
Call 321-362-4269Running a Fleet?
We offer fleet management to keep your trucks inspected, maintained and on schedule, so small problems never turn into roadside breakdowns.
Why On Demand
A Shop That Treats Your Truck Like Its Own
Family Owned & Operated
You deal directly with the people who own the shop and stand behind the work. No call centers, no runaround.
Engine & Chassis Focused
We specialize in the systems that keep you moving: engine, cooling, fuel, air, electrical and chassis repairs.
Straight Answers
Diagnostics first. We find the actual cause of the concern and tell you what it needs before any work begins.
DOT Ready
PM services, multi-point inspections and DOT annual inspections to keep your truck compliant and road legal.
What Customers Say
Hear It From Our Customers
Don't take our word for it — here's what truck owners across Central Florida are saying.
"I can't say enough good things about On Demand Diesel Repair. They've handled multiple repairs for me including wheel bearing replacement, fuel injector replacement, oil changes, and exhaust repair — every single job was done quickly, professionally, and at a fair price. My truck has never run better."
"EJ and his team at On Demand Diesel in Titusville took care of me and my 2025 GMC diesel from a fuel contamination issue. I highly recommend him for service. He runs a professional shop and is a man of his word."
"From the first phone call to the completion of the job, their professionalism, knowledge, and responsiveness stood out immediately. No upselling, no guesswork, just straight answers and solid solutions. The repair was done right the first time."
"I have been looking for someone in central Florida for the last 15 years. When he found out the truck was our only transport he juggled his schedule and completed the work that day. His work is top notch and his concern for his customers is obvious as he works."
"EJ and Victoria have been very informative, helpful and honest. My food truck was in and out. Cost is super reasonable — I could have had my issue fixed by a dealership for free, yet I still chose ODDR. If that tells you anything. Highly recommended."
"I brought my F-450 to have the CP4 to DCR Conversion done and couldn't be happier. They completed the work on the promised timeline, used quality parts, and thoroughly tested the truck before returning it. Pricing was reasonable and transparent."
"Solid team — when other mechanics give broken timelines and bandaid fixes, this was a breath of fresh air finding this shop. Efrain's shop will be the only one touching my semi's."
"Outstanding mechanic, family owned business. He's honest, reliable, and goes out of his way to help anyone. I highly recommend this man and his family — he's a diesel mechanic all around. Thank you very much."
"I want to thank On Demand Diesel Repair for their professionalism and honesty. My husband had his 2016 Ford F-250 checked out — all original parts. If you have a diesel vehicle this is your repair shop. Great job!"
"Top notch mechanic. He went out of his way to make sure I had my truck back next day. Did a complete fuel reflush for a great price. Great attitude and great atmosphere at his shop. Will be coming back."
"Their mobile diesel service was quick, professional, and convenient. They came right to my location, diagnosed the issue fast, and had me back on the road in no time. EJ was knowledgeable and friendly, and the pricing was fair and transparent."
"On Demand Diesel did a great job getting me back on the road. Their shop is conveniently located in Titusville and they even have a mobile repair truck if you can't make it there."
"On demand diesel is more than just a name — it's a promise. The owner is more than willing to go the extra mile to resolve issues! 100% recommend."
From the Shop Floor
What We're Working On
Live from our Facebook page. Every new job, update and post shows up here automatically.
Get In Touch
Bring It By or Give Us a Call
Located in Titusville, serving drivers, RV owners and fleets across the Space Coast.
Phone
321-362-4269Hours
Call for current hours and availability
Follow Us
On Demand Diesel Repair on Facebook