MDI are very customer service focused, they performed the job quickly and above expectations. My wife and I have a 2004 Beaver Monterey and I have been looking for a dependable reliable mechanic for over a year and now I have found one!!! read more

Wonderful, hardworking staff. We travel and on the road it was necessary to change the oil in the engine, we took it without an appointment, everything was done very quickly, washed the car, which is also very pleasant. read more

People are nice which is the only reason why they have a 2 star. Have a truck taken over to these guys and have had nothing but troubles since in doing so. Coming to find out they are more of parts chasers vs trouble shooters. Anywhere from ECM replacements(not the problem) to wiring harnesses replacements to now the trucks wiring is pulling a draw. Which they want us to find there errors. I do not recommend. read more

They always have the parts I need for my cat engines and have good customer service as well

Great shop. They diagnose and do honest work. You will want to call ahead if you can because they are very busy. The quality of work is ten times better than the dealerships in town read more

The only reason I'm not giving this place five stars is because it took them over three weeks to rebuild the engine in my truck. But they are a busy shop for a reason. They do good work here. Another nice thing about this place is you don't have to worry about anything missing from the inside of your truck. There are those shops that have thieves working for them. This is not one of those places. I will take my truck back to this place in the future if I need engine work. I just won't be in a hurry. read more

After having a really bad experience at another location, these guys were fantastic very helpful and really worked with us to get a great camper and a great deal. Will definitely go back again! Everyone at every level was super friendly and went out of their way to help us get what we wanted not just the sale. Jake in finance went way out of his way to help us even on his days off. read more

These guys were on their game. Diagnosed the issue in a timely manner. Everyone I dealt with was very helpful and friendly. I have already recommended MDI in Commerce City to a few people. read more

The most reputable diesel shop in Denver. Marini Diesel is professional and prudent with their service and operation. If you own a Cummins then you need to take there and see the difference between them and anyone else. read more

This place is awesome. Called for a part that I could only give a description and they called me back and had it ready for pick up in less than 10mnts. These guys are truly awesome. Priced just right and can take care of any Deisel needs for any big truck. read more

After speaking with Ben with the company the problem has been resolved in a very timely manner and found out that the head didn't come from them they are a third part, so I appolazie about the comments about Marini Diesel but Ben got us in contact with the correct company and Steve with MD Machine INC can down and help get the problem fixed and resolved in a very professional manner. Thank you read more

I have been coming here for truck repairs for over a decade. There is no one better. When I am on the road and something breaks, I will try to limp it home so I can get the work done here. It seems to me this is the only shop I go to anymore that things don't have to be fixed twice. They rebuilt my truck about 10 years ago and it has over 1 million miles on the rebuild. Very knowledgeable, courteous, and honest. read more