Longmont Auto Repair

A Full-Service Auto Repair and Maintenance Shop in Longmont, CO

DeMers Automotive is a full-service auto repair and service shop based in Longmont, Colorado. Since 1993, we have provided service to hundreds of satisfied customers across Boulder County and the surrounding areas.

tow truck

Tow Assistance

We can provide recommendations for towing companies if you need your car towed in for service.

shuttle service

Free Shuttle

If you need a ride after dropping off your vehicle, we have shuttle service at no charge.

water cooler

Air-Conditioned Lobby

Our lobby is air conditioned and has a water cooler to keep you cool while you wait.


Peace of Mind

We are a NAPA AutoCare center and provide a 36-month, 36,000 mile warranty that is honored nationwide.

Call now for service: ‭(303) 776-3666‬

demers automotive sign on main street in longmont

We’re conveniently located near 15th & Main in Longmont, Colorado:

1533 Main Street
Longmont, CO 80501

Map & Directions

Recent Blog Posts

Get Your Car Road Trip-Ready Before Hitting The Highway

Get Your Car Road Trip-Ready Before Hitting The Highway

Due to restrictions on flying and other measures that make traditional vacations more difficult, many Americans are taking road trips this summer. If that's part of your plan, we highly recommend you bring your vehicle in for an inspection before putting a few hundred...

Engine Cooling System: 4 Common Leak Locations

Engine Cooling System: 4 Common Leak Locations

Although it may not often take center stage, your car's cooling system is an essential part of the car's operation. Your cooling system helps to maintain a safe operating temperature for your engine, ensuring both its efficiency and its longevity. Serious consequences...

What’s a Differential and When Should You Worry About Yours?

What’s a Differential and When Should You Worry About Yours?

Your car's engine provides the grunt that propels you down the road, but it isn't the only star of the show. All that horsepower is worthless if it can't get to the wheels, and that's where the rest of your vehicle's drivetrain comes in. Depending on your...

Need Auto Repair or Service?

For basic questions about the types of services we offer, feel free to call us at ‭(303) 529-9240‬ or contact us online using our general contact form below.

Request an appointment for service online using our appointment request form. Tell us the date/time that you’d like to bring your car in for service and we will contact you to confirm a time that works.

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