Cummins Sales and Service 146 East Coury Avenue, Mesa, AZ 85210

"Do NOT go here they will rip you off and still not fix your issue. After 3 different visits to fix an overheating issue I had to do my own research and recommend what to fix because Spartan Chassis told me what it could be. And it was the issue, but I didn’t let Cummins fix it because they still charged me a $900 diagnostic fee even though I told them what to fix. Previously they charged me TWICE to replace a thermostat that wasn’t even the issue. And that wasn’t cheap in my 500hp Newmar. These guys have no idea what they are doing…no wonder why they had new service employees and mechanics every time I went. Go to Masseys Diesel Repair instead!"

"If I could leave no stars or negative stars, I would. This company only exists because they manufacture engines that for support, you have no other choice but to deal with them, there are no round abouts. Let’s talk about customer service. There is none. You call the number, you end up with a customer service rep that works from home. They either will not or cannot verbally contact the people working in that location. They tell you that they will “call” (you aren’t allowed to talk to them direct unless you physically go to the location), there is no phone contact with them except via the work from home liaison. They tell you that you will get a return call - then no return call, then they don’t understand why your frustration level is through the roof when you talk to them. Husband ordered a service manual. They say 6 weeks, it will be sent to the home address. Instead it goes to this facility and then you cannot talk to someone to verify they actually have it and it’s an 18 minute drive to hopefully be able to physically get it. This company sucks and so does the people that work there. If we didn’t have to do business with them, we definitely wouldn’t!"

"I recently brought my RV in for work in my generator. They were all personable, efficient and timely. It’s refreshing to deal with real professionals. Dr. Bruce B."

"First of all don't bother calling just plan on driving there to get an answer. First quote to replace the fan hub was $3400. Then asked a couple of questions about takeoff power loss. Then the manager got involved. He wanted to look at the radiator on my RV and then said I would get a revised quote. New quote was for $6500, labor almost doubled and added rehab of the radiators (21k miles on a 2019 Tiffin). My 3rd party warranty company said the Cummins quote was for $4100 but they said they would only cover $3100. Drove to Cummins (they did not return my call) to ask where things stand. They said they hadn't received an answer from the warranty company. I asked why the second quote almost doubled and the service rep got management to answer. He said that the radiators needed rehab and he didn't give a definitive answer as to why the labor increased $1600. At this point I can tell when I am being screwed. So my cost will be anywhere from $3400 to $6500 depending on which way the wind is blowing. No Thanks!!!! Got charged $560 for the diagnosis and my house batteries were completely dead. The Mesa Cummins service center is not honest."

"This the best service experience we have ever had with our 2014 Newmar. These guys Rock. Brian and the techs are incredible. We had a generator issue and had a full service done. Price was very fair and work was high quality. Thank you."