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ASE MASTER · DENVER · 3-YEAR WARRANTY

Honest Auto Repair  in Denver, CO 

Check engine on? Suspicious quote from the dealer? We diagnose with hard data, fix what's actually broken, and refuse to upsell. 3-year/36,000-mile warranty on every repair.

No hold music. A tech calls back in under 5 minutes.

19+ years in Denver Licensed & insured 3-year / 36,000-mile warranty on every repair and replaced part (honored at any NAPA AutoCare shop nationwide). 4.9★ on Google · 412+ reviews

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19

Years in Business

4.9★

Customer Rating

24/7

Emergency Service

100%

Licensed & Insured

Our services

Everything we offer

From quick fixes to full installations — quality work, transparent pricing.

Simple Process

How It Works

1

Call or Request Quote

Reach us 24/7 by phone or fill out our quick form. We'll ask a few questions to understand your needs.

2

Drop Off — Diagnostic in 90 Minutes

Drop the vehicle off or use our pickup service. We run a real diagnostic and send you a written quote before any wrench turns.

3

Back on the Road

We complete the repair, show you the old parts if you want to see them, and back the work with our 3-year / 36,000-mile warranty.

Testimonials

What Our Customers Say

“Brought in a used Tacoma I was about to buy. Eli's pre-purchase inspection found a head-gasket weep the seller swore wasn't there — saved me a $4,200 mistake. The $189 PPI was the best money I spent that month.”

Greg P.

Greg P.

Centennial, CO

Google

“Dealer quoted me $1,800 for a 'failing catalytic converter.' Rocky Mountain checked it, found a loose O2 sensor connector, and charged me $95 to fix it. They earned a customer for life on that one call.”

Sarah K.

Sarah K.

Lakewood, CO

Google

“I have an old Subaru with a check-engine light that three shops couldn't sort out. Eli found a cracked vacuum line in under an hour. No upsell, no surprise add-ons, just the actual fix. ASE Master is real here.”

Marcus D.

Marcus D.

Aurora, CO

Yelp
Eli Brennan
ASE Master Certified (CMT-1129)
AAA Approved Auto Repair
NAPA AutoCare Center
I-CAR Gold Class
Colorado Auto Repair Bonded & Insured

The Person Behind the Company

Eli Brennan

Owner & ASE Master Technician · License #ASE-CMT-1129

Rocky Mountain Auto Works was founded by Eli Brennan after 14 years working in a flat-rate franchise mill where techs were paid to upsell, not to fix. Tired of telling customers their car needed work it didn't need, Eli opened his own shop in 2006 with one rule: every repair gets diagnosed before it gets quoted, and every quote is the price you pay. Nineteen years and 412 five-star reviews later, that rule hasn't changed.

"Diagnose first. Quote second. Fix it right the first time."

Payment Options

Flexible Financing Available

Flexible financing available on engine, transmission, and timing-belt jobs — plans from 6 to 36 months with approved credit.

Synchrony CarCareONE Affirm
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Get Started

Request a Free Quote

Fill out the form below and we'll get back to you within the hour.

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Our Guarantee

Diagnostic fee credited to your repair — or refunded in full if we can't find the cause.

Where We Operate

Service Coverage Area

We cover a 25-mile radius around Denver — including Denver, Aurora, Lakewood, Centennial, and more.

Rocky Mountain Auto Works

25-mile coverage area

Denver Aurora Lakewood Centennial Englewood Boulder Thornton Westminster Arvada Littleton
Common questions

Answers before you book

The questions clients ask before they pick up the phone.

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