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Twin Peaks Auto Repair
“Mike and his mechanics went above and beyond to troubleshoot and make repairs to my vehicle!”
Best Car Tune-Up in Longmont, CO
15 technicians listed · 8 in Longmont · 2 open weekends · 14 rated 4.5+
Data verified October 16, 2026
Stonum Automotive
“Great place, great service, knowledgeable employees, friendly, courteous, and helpful in every way.”
A2Z Complete Car Care
“He let me know everything he saw going on with it, how much it would cost to repair.”
Theboostcreep Ltd.
“Came up from sea level and made 20hp more than my last dyno run.”
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5250 Performance
“I've been going to 5250 as my go to shop now for my 2015 WRX and had nothing but fantastic service from routine maintenance, to performance upgrades and advice.”
Seasons Performance Auto Repair
“Great spot, Would recommend and will recommend to anyone in need of mechanic work.”
Listed for drivers in and around Longmont, CO, these 15 shops handle tune-up work and running faults. What each one says about diagnostics, warranties and service specials comes from its own website; ratings and quotes come from public reviews.
Area overview: Longmont, CO
Of the 15 technicians we list here, 8 are in Longmont itself and 7 come from towns including Lyons (2, 10 mi), Frederick (1, 7 mi) and Firestone (1, 9 mi). The technicians on this page are rated from 4.3 to 5.0 across 1,053 reviews; 9 have 50 or more reviews and 14 are rated 4.5 or higher. When customers rate these technicians on specific qualities, they most often praise professionalism (92%), quality (83%) and value (83%). The topics that come up most in reviews of the technicians on this page are "diagnosis", "communication" and "fair". 2 are open on Saturdays. 2 list staff certifications (ASE) and 4 have a BBB rating of A or A+. Domain records put 7 websites of the technicians on this page at ten or more years old; the oldest dates from 2005. 1 gives free estimates; 3 are family- or locally-owned and 2 list coupons or special offers. We have a website on file for 10 of the technicians on this page; 9 publish a contact page; 6 list a public email and 3 take bookings online. We count these figures across the technicians on this page; distances are straight-line, and hours and prices change, so confirm the details with the technician before you visit.
Which shops listed for Longmont open on Saturdays or Sundays?
2 of the 15 shops here show Saturday or Sunday hours. Plugs and filters fit neatly into a Saturday. A chase for an intermittent misfire does not, since it can need the car overnight to catch the fault happening from cold.
Auto Electric Ramirez
“Daniel has great service very thorough and gets it done with a great price.”
Troy's Automotive
“Small business family owned and operated with the most friendly individuals I've ever met Troy himself exceeded any and all expectations I had when building my Jeep!”
Lyons Automotive
“They were very accommodating, and we're able to replace my battery quickly.”
Twin Peaks Diesel
“They got my 2014 ram diesel in Fast & gave me a great diagnosis that saved me money over what I thought the problem was.”
East
“They always share details of what is going on, options and even tell me when something doesn't need to be done.”
Onorato Garage
“Called Onorato Garage and they were able to get us in the next day and had it fixed and AC blowing cold in a few hours flat.”
Gateway Auto Services
“Honest, fair prices, fast work, would not take my cars anyplace else.”
Cardinal Service Center LLC
“Great place and prices with very knowledgeable employees and a wonderful owner who interacts with customers daily!”
Inter-Mountain Repair
“He always comes in at his estimate and calls prior to any unexpected work.”
Why these companies made our list
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