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Walworth’s Auto Repair Experts

Quality Automotive Repair & Service You Can Trust

Welcome to O’Neillz Automotive, your trusted local source for honest, high-quality auto repair in Walworth, Wisconsin. Family-owned and operated, we’re dedicated to delivering dealership-level service with the friendly, personal care only a hometown shop can offer. Whether you need a routine oil change, a complex engine repair, or a Wisconsin safety inspection, our ASE-certified team ensures your vehicle gets the attention it deserves.

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Comprehensive Auto Repair & Maintenance

Keeping Your Vehicle Running Smooth, Safe, and Reliable

Our full-service facility covers every system in your vehicle. Whether you’re coming in for a check engine light, scheduled maintenance, or major repairs, you’ll find the service you need below:

General & Preventative Maintenance
Tires & Wheels
Brake & Suspension Systems
Engine & Transmission
Heating, Cooling & Electrical
Exhaust System
Fleet & Commercial Vehicle Services
Auto Repair Walworth WI
“We treat every customer the way we’d want our own family treated. Honestly, fairly, and with respect.”

Patrick O’Neillz

Owners

Why Choose O’Neillz Automotive?

Trusted Service, Honest Repairs, and Quality You Can Count On
Locally owned and family operated
24-Month / 24,000-Mile Nationwide Warranty on parts and labor
ASE-Certified technicians with decades of experience
After-hours drop-off and pick-up available
Roadside assistance through TechNet
Walk-ins welcome, same-day service available
Comfortable waiting area with free Wi-Fi
Auto Repair Walworth WI

What Our Cusotmers Say

Customer Satisfaction is Our Top Priority
gina cook profile picturegina cook
00:44 05 Aug 25
We have been going to O'Neillz for our auto needs for awhile. They are always very accommodating. It's rare that a mechanic tells it to you straight. They do the work that's needed and stand behind they're work too. O'neillz gets a 5 star rating from us.
Dylan Sprowl profile pictureDylan Sprowl
14:30 11 Jul 25
Great service at an affordable price. Very considerate and thorough. Would highly recommend.
Cliff Semmler profile pictureCliff Semmler
22:16 28 May 25
Great place to maintain your car or truck
Lauren Mueller profile pictureLauren Mueller
19:44 15 May 25
Absolutely amazing service! Great customer service as well! Rachel was very friendly and the owner Patrick was also kind and offers amazing prices for stellar work! It’s nice to have a local repair shop you can trust! They will be getting all of our families business!
Carol Doherty profile pictureCarol Doherty
14:29 12 May 25
Professional, Knowledgeable and honest!
No one is better!
Thank you for all you do
Dan Mahoney profile pictureDan Mahoney
15:19 16 Apr 25
Called to get a brake job scheduled and they got me in right away. Top notch service and great value!
Tim West profile pictureTim West
20:01 15 Apr 25
Just a new tire change best prices around thanks
Gary S profile pictureGary S
14:22 10 Apr 25
Had to bring my car here after an engine replacement for some warranty covered issues. Patrick was completely awesome, he communicates issues and problems that he finds. Fast turn around time on dropping the vehicle off and getting it back. Also follows up with you after you get your car back to see if you're happy with the work. Definitely recommend this shop and Patrick as your wrench turner!
Sarah Hulke profile pictureSarah Hulke
18:20 09 Apr 25
I called O’Neillz after finding out my regular mechanic was booked 2 weeks out. Not only was I able to get in the same day but was also supplied with a loaner car. Within 24 hours, they had my car fixed & ready. I even received a follow up text a day later to make sure it was running better (it was). Patrick & his wife go above & beyond, they are a wonderful team. I will definitely be using O’Neillz from here on out!
Bre Baker profile pictureBre Baker
21:21 05 Mar 25

Schedule Your Service Today

Need an oil change, diagnostic test, or major repair? The team at O’Neillz Automotive is ready to help. Call 262-394-5575 or stop by 205 Madison Street, Walworth, WI 53184, just up the street from Heyer Park. We’re open Monday through Friday, 8 AM – 6 PM, and always welcome walk-ins and same-day service.

Our Services
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Hours of Operation

  • Monday: 8:00 AM – 6:00 PM
  • Tuesday: 8:00 AM – 6:00 PM
  • Wednesday: 8:00 AM – 6:00 PM
  • Thursday: 8:00 AM – 6:00 PM
  • Friday: 8:00 AM – 6:00 PM
  • Saturday: Closed
  • Sunday: Closed