Best Engine Repair and Replacement in Lehi, UT

“My car was just in their shop for a while due to a complex issue and Rob consistently went above and beyond for me, including taking my car in to another shop to get my late emissions done which I had expressed being stressed about having to leave my...”

“They really don't want you to waste time or money, and Zac even took the time to show my husband how to fix something on the car himself which saved us a lot of money.”

“Over the weekend I replaced my injectors in my duramax by myself and when I went to start it wasn't running right, took it to Willis diesel, they diagnosed it in 20 min after running codes and checking balances after tearing my engine down it ended u...”

“Helped save me thousands by confirming my k20 head wasnt cracked and that it was just casting, port, polished, did a valve job and installed all my parts including my valve guides all for a good reasonable price.”

“Jay was super quick to respond to a quote and had the lowest quote for my shock replacement.”

“After calling a few places, I chose to go here because of the helpfulness of the person on the phone, the price being slightly less, and the turnaround promised was better than other places.”

“I called to make an appointment for my car and was informed that Mr.”

“I thought the owner was a little less thorough than I was used to for emissions and I personally had a hard time understanding him because of his accent.”

“He quickly diagnosed my truck, had it fixed the very same day, and called me to let me know it was done.”

“He takes the time to explain why he chooses a particular product over another, and will recommend replacing/fixing anything else that sends to go faulty and explains the consequences of not replacing that part, but I've never felt pressured in any wa...”

“If they don't have what you are looking for in stock they get it for you quickly!!”

“Chad at M&M Diesel really stepped up and put everything aside to get my work truck up and running so my business can keep moving and I appreciate that.”

“I've bought 3 cars from them for my business and I have yet to have any major issues.”

“Their salesman was easy going and never pressured me into buy something i didnt want i highly recommend them on ur next purchase weather its a truck car or suv”

“Explains in detail again all the work he did after completed and showed me the damage on the old parts, showed me where they go under the hood, and showed me the new parts in place.”