THE MODERN DIESEL GUARANTEE

We offer a 3 month, 4,000 mile warranty.
We also offer a lifetime warranty on most front end parts.

FROM DIESEL REPAIR TO FLEET SERVICE TO ROADSIDE WE HAVE YOU COVERED

Looking for Austin’s most reputable diesel repair and fleet service? Look no further. Since 2015, Modern Diesel has built an incredible base of customers that span from trucking businesses to pizzerias. 

Hands down, if you have a diesel fleet, you’re going to want to check us out. We even do mobile repair if one of your drivers gets stuck on the road.  

Questions about your vehicles? Talk with an expert, you can reach out to us anytime and live 8-5pm M-F.

The modern diesel guarantee

3 Month / 4,000 Mile Warranty

We offer a 3 month, 4,000 mile warranty. We also offer a lifetime warranty on most front end parts.

I took my 2007 5.9 Cummins in with an intermittent fuel problem. Threw a fuel delivery error code. Was in the shop for approximately one month before being diagnosed which was the first red flag. For the first 3 of these weeks, I would call multiple times to be told it was “likely” the lift pump. Was even told they were in the process of purchasing one.Next week, I get an email that all injectors need to be replaced at a cost of $4,400. This just didn’t sit right with me because of a) sudden change in diagnosis, b) low miles of truck (<90k original) c) no hard start or white smoke. I decided to take it to another mechanic for a second opinion. To my surprise, the truck was running flawlessly when I picked it up-furthering my suspicions that that was an electrical issue. Adding to my belief that they could not figure out what was wrong with it, I was not given any hard measurements or readings as to why they thought injectors were bad. If you look at the diagnostics write up, 99% is about unrelated issues (“Tech found hood does not stay up and suggest replacing hood shocks”, etc) and the last line states “FUEL INJECTOR-Remove and Replace all”I’m so glad I trusted my gut and got a second opinion. Ended up being an electrical part (fuel control actuator) and for less than $300 I was back on the road. Have now driven 5000 miles and had no issues. Waited to post this until I was confident that my problem would not come back.I’m leaving 2 stars rather than 1, because the workers were all very nice to me. They did not try to pressure me to make the fix without getting a second opinion first and I think many mechanics would have. Also from many great reviews, I think they may have just missed the mark on mine.
Alex P
Alex P
15:10 19 Sep 22
First visit was for preventative maintenance and was given an A+. Second visit five days later The vehicle started giving me problems and I was told it needs $9,100 worth of work. Took it to a different shop – $400 in maintenance needed. Absolutely ridiculous.
Jon K
Jon K
20:30 30 Aug 22
The absolute best diesel shop around texas. I couldn’t find anyone to work on my truck as it’s a fummins project. They gladly worked on my truck and fixed everything for me. I will continue to go back.
David Clements
David Clements
02:45 26 Aug 22
Raddest diesel shop in the ATX. On gahd
Joel Cook
Joel Cook
13:22 24 Aug 22
I’ll keep this short and to the point. After having a nightmare with Ram Country in Fort Stockton Tx, we decided to have our truck (2017 Dodge Ram 3500) trailered over 300 miles to Modern Diesel. After dealing with Keri?(spelling), Brian and Chance, they were able to do a complete motor change on the pickup to get us back on the road within a week. The guys at Modern Diesel are very professional and efficient!
Wayne Bateman
Wayne Bateman
16:51 22 Aug 22
I did not know about modern diesel. I was doing agoogle search for a diesel mechanic. I did try other adds but did not receive a call back. I talked to Chance suggested that I allow them to run a diagnostic on my truck. I was going out of the country and decided to allow Modern diesel to check out my truck while away. Chase was very helpful in contacting me while on my trip which he did with emails and phone calls. The reason I was having the truck worked on was a fuel delivery issue. But while doing their 50+ point inspection numerous items were detected and corrected with approval. The fuel problem was not found but the other issues corrected would save me headache later down the road. I would recommend this shop to anyone who is looking for a shop who does what they say they’re going to do which is a rare find these days. I will be using them to assist me in maintaining my 2014 3500 HD Ram 4x4Raymond DMetal 2 MetalWelder qualifications and training
Raymond Duran
Raymond Duran
02:31 22 Jul 22
Great service call got me in for new turbo install very quick and great guys
conner ferguson
conner ferguson
21:59 08 Jul 22
jordyn twom
jordyn twom
19:34 30 Jun 22
Simply Playing
Simply Playing
19:33 30 Jun 22
Connor Cerasi
Connor Cerasi
15:29 30 Jun 22
My boyfriend brought his truck in a couple weeks ago & Ernie did an amazing job!! Very friendly & professional! Would definitely recommend!
Amber Leal
Amber Leal
20:24 24 Jun 22
Got me in for some quick work. Steering box / pitman / tierod. Good group of guys. Will use them again if I’m back in Texas.
Colby Mowery
Colby Mowery
20:05 24 Jun 22
These guys did great work for fair price and fast . Appreciate the hard word ! Will definitely use them again .
TxFlooring Pros
TxFlooring Pros
17:19 24 Jun 22
Great service, great people. Got my 04 Duramax running right!
Michael Mender
Michael Mender
14:49 22 Jun 22
Shop replaced head gasket, EGR cooler, coolant bypass kit. Worked with me and fixed the problem
Cain Grogg
Cain Grogg
22:37 20 Jun 22
Robert Wooley
Robert Wooley
22:28 20 Jun 22
Ernie did a great job on my truck!!
Manuel Ibarra
Manuel Ibarra
01:32 18 Jun 22
Modern diesel was straightforward and provided a detailed invoice for the repair. Chance was an excellent service advisor and I was satisfied with my repair. I will be a returning customer.
Michael Telles
Michael Telles
19:54 15 Jun 22
Helpful, professional, fair price, nice guys.
Matthew Mallary
Matthew Mallary
01:48 15 Jun 22
The guys were very honest and upfront about pricing and worked hard to get my vehicle done when I needed it 🤙🏽
Travis Sims
Travis Sims
22:40 14 Jun 22
Came in for an A/C check happy to say they multiple leaks and was able to fix them all
Jeremy Melton
Jeremy Melton
21:37 10 Jun 22
We had a truck go down on a Sunday. Towed into Modern Diesel. By noon on Monday they called us with a diagnosis and plan with parts and labor. Very friendly and affordable for the quality work they do.
Austin Alaniz
Austin Alaniz
20:34 10 Jun 22
They worked on my 1999 7.3 power-stoke. Fixed oil leaks and fixed up the steering. Nice guys, timely work. Seems like they know their stuff. Great customer service.
Tab Barker
Tab Barker
22:06 09 Jun 22
Great guys!! Got my truck to them late in day after hours and they had positive and professional attitudes! Also had my truck fixed very fast!!
Pig Reaper
Pig Reaper
19:18 09 Jun 22
Awesome work
MICHAEL CROWELL
MICHAEL CROWELL
13:57 08 Jun 22
Good work with great service.
Jeffrey East
Jeffrey East
13:42 08 Jun 22
Hallie Jones
Hallie Jones
13:21 08 Jun 22
Love the Modern Diesel Team’s customer service! Great work! Would recommend them for all vehicle repairs or upgrades!
Anita Ouellette
Anita Ouellette
13:19 08 Jun 22
terrible drivers
Geoffrey Lancon
Geoffrey Lancon
20:41 01 Jun 22
Our sister company. We work closely to make sure repairs are of the highest quality. Services both east and west side of Austin.
Modern Diesel 4X4
Modern Diesel 4X4
18:51 23 May 22
Serviced our septic truck for over a year. Love the work and appreciate the crew.
Modern Waste
Modern Waste
18:42 23 May 22
Great group of guys. we had Cummins engine work and some suspension add ons. I recommend this place for sure.
Ricki Johnson
Ricki Johnson
18:40 23 May 22
Heroes work here
Aimable Munezero
Aimable Munezero
20:52 29 Apr 22
Outstanding people right here they actually care for the customer.I will never go anywhere else. If you have any diesel truck problems go see John and the guys at modern diesel they will take good care of you thru and thru
Nathan Jones
Nathan Jones
01:30 15 Apr 22
I took my boyfriends truck in not expecting much from a local mechanic shop and they really surprised me. The guys in the office were extremely helpful and informative. They provided me with a ride home during the repairs and finished the job within a reasonable time and in budget. I would definitely recommend.
Julia Dow
Julia Dow
14:59 01 Apr 22
John and the crew were great, diagnosed the truck, got the parts, and fixed the problem. Solid communication through the process. Very much appreciated gentlemen!
Ibkghost
Ibkghost
00:09 19 Mar 22
Excellent customer service and all around great people. Definitely recommend!
Mary Walls
Mary Walls
04:53 25 Feb 22
Gear place to take you diesel truck quick diagnostic and will even find things wrong that you did not know with there head to toe inspection.
Jonathan DeRocher
Jonathan DeRocher
03:13 08 Feb 22
Nothing was done on my truck, they re just good at changing parts, but not to diagnose and make sure what is been replace fix’s the problem or not. My truck was there for a month spend $4,776. Still have the same problem.I purchase all the parts they requested but still have the same problem. They will never call when they say they gonna call you. Will never go back to this place.
Sumaila Amoah
Sumaila Amoah
22:21 10 Dec 21
Great guys took care of my highly modified f250 before our road trip to North west Oklahoma. Thank John and the rest of the crew at Modern Diesel 👍🏽
Dr. BOWDOIN
Dr. BOWDOIN
09:55 22 Nov 21
Guys are awesome if you need any diesel needs call these guys they the truth!!
Edward Chandler
Edward Chandler
21:42 31 Aug 21
Fast efficient and friendly!!
George Jones
George Jones
23:05 30 Aug 21
Best service in town !
oVidius Villa
oVidius Villa
22:34 26 Aug 21
Sergio Davis
Sergio Davis
23:52 25 Aug 21
If I could give them a zero star I would. They didn’t do the work I pay them to do. My Radiator fan has an issue n I pay them to get the job done, they order the part, put it on, same problem. I call freightliner and ask them about the part. Guess what, these guys order the reverse part, wrong one. I just spend 1300 for nothing. Plus my engine light was on, they told me that problem was also fix, two hrs later, the light came right back on. If you guys cannot get the job done, please do not fool the customer, that’s bad business.
Will Dennis
Will Dennis
14:16 23 Aug 21
Rydatime
Rydatime
17:29 15 Jul 21
Let you know when I get my truck back
Eric Isreal
Eric Isreal
00:27 08 Jul 21
Beautiful assistance
Jose Sanchez
Jose Sanchez
05:44 30 May 21
Great service at a great price! The people there share the passion for diesel performance and have a great sense for the small details that set you apart from others!
Colt Thomas
Colt Thomas
02:25 28 May 21
These guys have worked on multiple vehicles for me, from my company trucks to personal trucks, boat and even dirtbikes. They’ve always treated me right and I recommend my friends and family to them. Good people all around. I came in the other day and they were having a company breakfast while discussing some books they read together. 6 stars for the company who treats customers AND employees with long term relationship goals.
Beau Curtis
Beau Curtis
01:17 03 Mar 21

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Call 512-717-2777 or use this contact form.|DIESEL REPAIR