Business Details
25 Years
experience
Your Trusted Auto Repair Partner in Aurora & Centennial, CO
Keller's Professional Auto & Diesel has been an industry leader since its inception, built on a foundation of customer-centric values and technical expertise. With 50 years of combined experience across our team, we specialize in comprehensive auto and diesel repair services, backed by an industry-leading 5-year/50,000-mile 100% replacement warranty covering both parts and labor. As a family-owned and operated business since 2001, we maintain a commitment to honest service, transparent communication, and technical excellence. Our Aurora and Centennial locations offer convenient access to top-rated maintenance solutions including oil changes, brake systems, engine diagnostics, and climate control repairs. We prioritize customer education, ensuring clients understand their vehicle's needs without pressure for unnecessary services.Our dedication to quality is reflected in our military and senior discounts, local shuttle services, and secured early bird key drop-off options. Recognized for our reliability and technical proficiency, we serve as a trusted partner for both routine maintenance and complex repairs. Our team's longevity - with many members employed since our founding - ensures consistent service standards and institutional knowledge. We maintain partnerships with Acevedo's Towing for emergency assistance and utilize SureCritic.com for transparent customer feedback. Through this combination of technical capability, customer focus, and community commitment, we deliver automotive care that exceeds expectations.
Services
Oil Change
Brake Replacement
A/C Repair
Engine Diagnostics
Transmission Service
Suspension Repair
Cooling System Maintenance
Diesel Performance
Check Engine Light
Tire Rotation
Details
- Year established: 2001
Highlights and features
- 50 years combined experience in automotive repair
- Industry-leading 5-year/50,000-mile 100% replacement warranty
- Family-owned business with consistent team since 2001
- Military and senior discounts available
- Secured early bird key drop-off service
What people say
Great staff
Fair pricing
No upselling
Quick turnaround
Trustworthy mechanics
Services
Oil Change
Regular oil changes maintain engine performance and longevity. Our technicians use premium lubricants and filters to protect your vehicle's engine. We follow manufacturer recommendations for service intervals while checking for potential issues during each visit.
Brake Replacement
Comprehensive brake system maintenance includes pad/shoe replacement, rotor resurfacing, and hydraulic component inspection. Our free brake inspection identifies wear patterns and ensures safety compliance. We use OEM-quality replacement parts for reliable stopping power.
A/C Repair
Our climate control specialists diagnose and repair heating and air conditioning systems. Services include refrigerant recharge, compressor diagnostics, and cabin filter replacement. We ensure optimal performance for passenger comfort in all weather conditions.
Engine Diagnostics
Advanced diagnostic tools identify engine performance issues through OBD-II codes and live data analysis. Our technicians interpret fault codes while performing physical inspections to determine root causes of check engine light activations.
Transmission Service
We service both automatic and manual transmissions with fluid exchanges, filter replacements, and component repairs. Our diagnostics identify shifting issues, fluid leaks, and mechanical wear patterns to restore proper transmission function.
Questions
What does your 5-year warranty cover?
Our warranty covers 100% replacement of both parts and labor for repairs performed at our facilities. This includes manufacturer-specified components and workmanship guarantees.
Do you service both gasoline and diesel vehicles?
Yes, our technicians specialize in both gasoline and diesel engine systems, including performance tuning, emissions diagnostics, and fuel system maintenance for all vehicle types.
How do I schedule an appointment?
Call either our Aurora (303-343-9200) or Centennial (720-876-1111) location during business hours. We offer secured early bird drop-off for after-hours convenience.
Are military discounts available?
Yes, we offer 10% off all parts and labor for active duty personnel, veterans, and their immediate family members with valid identification.
Do you provide shuttle service?
Yes, we offer complimentary local shuttle service within a 5-mile radius of both locations for customers needing transportation during vehicle service.
Reviews (7)
Robb H.
Jun 11, 2022
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Awesome service. Very professional service writers. And great technicians! Always bring my vehicle here for mechanical work.
Pinnacle Roofing
May 06, 2022
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Nice enough people I guess but I've only ever "talked" to them. Called 3 different times and services were always 30% to 80% higher than other places, including dealers, so I've never used them
Rashad Washington
Dec 25, 2021
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Highly recommended for diesel. These guys have basically rebuild my engine, love that they Guarantee their work for 5yrs or 100,000 miles.
Brian Beebe
Dec 08, 2021
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These guys were able to get my suburban in same day for an oil change and to fix a coolant leak. They were helpful with advising me on future services and charged a good price. I'll be going back, and I recommend Keller's to anyone else who's looking for an honest mechanic.
Megan Foreacre
Nov 17, 2021
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I am very happy with the service I received from Keller's! They explained everything that was going on and what they needed to do. The cost/time frame was exactly what they told me it would be. I got my car back yesterday and it runs better than it did before it was having problems! 100% would recommend. 100% will go to them again. Service: Auto engine diagnostic
S. Martin
Sep 23, 2021
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Nate has always been honest, and professional. Over the years, I have had oil changes, new tires, breaks and a timing chain replaced on my truck. Only place I go.
Keith Hoagland
Sep 18, 2021
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Needed a frontend alignment, another alignment shop Pepboys gave me one. Return with same results pulling hard to right. Took my 4wheeler to KELLEY'S they aligned quickly and most inportant its steering straight. They gave me printed computer print out of before, ideal required specs. And after. Works like new.
