Boulder Auto Service and Repair is Moving!
After 23 years of serving the community through Boulder Auto Service and Repair (originally Baseline Auto Service), I am semi-retiring. I am delighted to share that Tony, our longtime mechanic, is taking over the business and relaunching as Longmont Auto LLC in Longmont, CO (505 Weaver Park Road, Unit D, 80501). I have worked alongside Tony for over 20 years and am confident he will continue our core commitment to exceptional customer service and quality workmanship. 

If you've worked with us in the past, Tony and team have your history on file. I realize the new location may be a further drive for some of you, but I encourage you to continue to trust your vehicle with Tony. He is honest and competent; if he tells you your car needs something, your car needs what he's recommending! He's not in the game of trying to sell services or repairs that are not necessary. I personally wouldn't trust my car or my daughter's car with anyone else. 

Our last day of business in the current location is Wednesday, March 23. Our phone number will remain the same under Longmont Auto LLC, so call Tony to schedule your next visit to the new shop!

Boulder Auto has been a labor of love for me and I will sincerely miss you, our customers. It has been my pleasure and honor to help you care for your cars since 1999. I wish you all the best!

Sarah Quillen
Owner of Boulder Auto Service and Repair
Longmont Auto LLC.
505 Weaver Park Road Unit D
Longmont, CO 80501
 (303) 442-8717
Honesty. Integrity. Expertise.Full Service Auto Repair and Maintenance You Can Trust.
(303) 442-8717Schedule Your Service
Longmont Auto LLC. |505 Weaver Park Road Unit DLongmontCO80501 | (303) 442-8717
item imageWE STAND BEHIND WHAT WE DOOur auto repair work comes with a NAPA Nationwide 12 mo. / 12,000 mile warranty.
item imageYOU ARE #1From the moment you step on our lot until the time you drive away in your car, your auto repair experience is our number one priority.
item imageFULL SERVICE AUTO REPAIR SHOPWe want to be your auto service and repair partner. Our pledge is to treat you like we would want to be treated and to help you keep your vehicle in top running condition because you depend on it.

Full-Service Auto Repair Shop
in Longmont, CO

About Us

Longmont Auto LLC. provides a wide variety of auto repair services for drivers who need their vehicle to reliably run in optimal condition. 

Our work is backed by our NAPA AutoCare Center - NATIONWIDE WARRANTY, 12month/12,000 mile labor and parts warranty.

From simple repairs to large concerns, we handle trailer hitch installation, brakes, cooling system issues, electrical diagnostic and repair, factory maintenance and much more. 

Our Mission at Longmont Auto LLC. is to consistently provide our customers with quality auto repair, at a fair price with customer service that will exceed your expectations.

Our Standard

At our auto repair shop, we excel at three things: experience, knowledge, and integrity. 

For almost 30 years, our mechanics and technicians have consistently and tirelessly delivered value to our clients. Our goal has always been to save you time, energy, and money as well as build trust between consumers and their mechanic. 

To this end, we've hired the best people for the job. Our crew is friendly, transparent, professional and above all else, skilled at what they do. Our skilled mechanics will take care of your car and ensure that you're ready to get back on the road at peak performance.

Our Services

  • Trailer Hitch Installation
  • Brake system evaluation and repair
  • Complete drive train and suspension
  • Cooling system evaluation, maintenance and repair
  • Diagnostics including running problems and check engine lights<
  • Electrical diagnostics and repairs
  • Engine work, including replacement
  • NAPA AutoCare Center - NATIONWIDE WARRANTY - 12 month/12,000 mile labor and parts warranty
  • Regularly Scheduled Factory Maintenance - Oil changes include a complete inspection, top fluids, check tire pressures, and more

Schedule An Appointment!

Are you looking for premier auto service and repair in Longmont, CO? Never settle for second best. Visit us or contact our team at
(303) 442-8717 today to schedule an appointment.

We'll get you back on the road in no time.

Founded in 1990 - 100 percent women owned since 1999.

What Kind Of Auto Repair Or Service Can We Help You With?