Automotive diagnostic equipment and modern workshop

Ann Arbor's Trusted Auto Care

What's Really Going On Under Your Hood?

Check engine lights don't lie — but they do need the right eyes. We combine precision diagnostics with honest, straightforward repair so you know exactly what your vehicle needs and why.

Call 734-973-9100 Our Services

15+

Years Experience

5★

Google Rating

100%

Honest Estimates

ASE

Certified Techs

What We Do

Expert Automotive Services

From routine maintenance to complex electronic diagnostics, we keep your vehicle running at its best — with clear explanations and fair pricing every time.

Computer Diagnostics

Advanced OBD-II scanning and proprietary diagnostic tools to pinpoint check engine lights, sensor failures, and electronic gremlins — fast and accurately.

Oil Changes & Maintenance

Keep your engine protected with quality oil changes, fluid checks, filter replacements, and scheduled maintenance tailored to your vehicle's needs.

Brake Service

Complete brake inspections, pad replacements, rotor resurfacing, and fluid flushes. Your safety on the road depends on brakes you can trust.

Engine Repair

From minor tune-ups to major overhauls, our technicians diagnose and repair engine issues with precision — saving you time and preventing costly breakdowns.

Transmission Service

Transmission diagnostics, fluid changes, and repairs for both automatic and manual vehicles. We catch problems early to keep you moving.

Pre-Purchase Inspection

Buying a used car? We'll give you a thorough, unbiased assessment so you know exactly what you're getting — and what it might need down the road.

Automotive Master Diagnostics workshop interior

About Us

Ann Arbor Deserves Better Than Guesswork

Automotive Master Diagnostics was founded on a simple belief: every driver in Ann Arbor deserves a shop that treats their vehicle like their own. We're not a franchise. We're not chasing volume. We take on each car with the attention it deserves.

Our team brings years of hands-on experience across all makes and models — from domestic sedans to European imports. We invest in the latest diagnostic technology so we can solve problems on the first visit, not the fifth.

ASE-Certified Technicians

All Makes & Models

Transparent Pricing

Same-Day Service Available

Why Choose Us

The Difference Is in the Details

We've built our reputation on doing the right thing — even when no one's watching.

No Surprises, Ever

We explain what we find before we touch a wrench. You'll always know what's wrong, what needs to be done, and what it'll cost — with no hidden fees or surprise add-ons.

Right the First Time

Our diagnostic equipment and experienced technicians mean we solve the real problem — not just the symptom. Fewer comebacks, fewer headaches, fewer trips back to the shop.

Your Vehicle, Your Timeline

We respect that your car is essential to your day. That's why we prioritize efficiency without cutting corners, and we keep you informed every step of the way.

Get In Touch

Ready to Get Your Vehicle Running Right?

Give us a call or stop by our shop on Phoenix Drive. We're here to help with honest answers and fair service — every time.

Address

814 Phoenix Dr, Ann Arbor, MI 48108

Phone

(734) 973-9100

Email

service@masterautodiag.com

Hours

Mon – Fri: 8:00 AM – 6:00 PM
Sat: By Appointment

Send Us a Message

Tell us about your vehicle and what you're experiencing — we'll get back to you promptly.

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