Longmont Auto Repair

These guys were super knowledgeable, and very pleasant to work with! I highly recommend!!

Saved the day on the Friday after New Years! Friendly and helpful, went out of their way for me.

Friendly and helpful, saved the day on a Friday when others would tell me to book an appointment weeks later.

I met one of the mechanics in an AutoZone parking lot, when I wasusing the diagnostic tool to check why my engine light was blinking right after having my catalytic converter replaced by my previous mechanic. The mechanic from this shop was able to offer to read the diagnostic tool and explain the problem to me. I asked him for his card and, scheduled an appointmentand they repaired my engine and importantly, gave me a good price and really made sure that I understood what was happening with my truck. Im very pleased to have found my new mechanic!

Quick and quality service. Would recommend to anyone who needs good service at a fair price!

Great response time, quality diagnostics, and effective repair. My automotive repair place of choice.

The team at Automotive Authorities always does a good job, minor or major. I have yet to find a better group of mechanics in Longmont.

tldr; I found Automotive Authorities to be reasonably priced and friendly :) As the cold weather set in I noticed my 6.7 PSD wasn’t idling as well as it used to on cold starts, but it wasn’t throwing any codes yet. Knowing the fuel systems on these trucks can be finicky and that I had a big trip coming up I wanted to have it checked out for peace of mind. I appreciated that your team heard and investigated the concerns with the truck even though there wasn't a CEL / prominent issue. Testing for compression and injector leak-down gave me peace of mind that there wasn’t a major issue looming, and the recommended bg fuel system treatment cleared up the rough cold idle I was worried about in addition to improving my miles per gallon.

Great service with honest folks at a fair price!

These guys are professional and quick and perfectly priced!