Trusted Auto Repair in Saint Paul Park Since 1961

Duffy’s Auto Service is a family-run auto repair shop that has proudly served Saint Paul Park, MN, and the surrounding communities of Cottage Grove, MN, Washington County, MN, Newport, MN, and Woodbury, MN, for over 60 years. Duffy’s has become a cornerstone for trustworthy auto services for all makes and models, including diesel vehicles. We also have a gas station with five fuel stations and a convenience store.

Jay Moser took the reins at Duffy’s Auto Service in 2016, carrying on the shop’s tradition of exceptional automotive care. Jay’s passion for cars began at an early age, working alongside his father, a skilled mechanic, who taught him the fundamentals of auto repair. His experience grew while working for a parts supplier, where he collaborated with auto shops of all sizes, gaining invaluable industry insight and fostering his dream of owning his repair shop.

Outside the shop, Jay enjoys golfing, spending time with his dogs, and traveling. Under his leadership, Duffy’s Auto Service has expanded to offer a multitude of services. We serve as a true dealership alternative.

Auto Services You Can Trust

At Duffy’s Auto Service, we pride ourselves on being a one-stop solution for all vehicle repair and maintenance needs. Whether you drive a compact sedan, a diesel truck, or anything in between, our ASE-certified technicians have the expertise and tools to handle it all. Most of our services are backed by an industry-leading 3-year/36,000-mile warranty.

We’ve invested in cutting-edge equipment, including ADAS calibration systems, alignment machines, and multiple scan tools. Our mission is simple: to deliver honest, reliable, and high-quality service while ensuring complete customer satisfaction.

Modern Amenities for Your Convenience

  • Accessible to our gas station, convenience store, and car wash, all under one roof.

  • Free shuttle service to get you where you need to be.

  • Loaner cars are available on request to keep you moving while we care for your vehicle.

  • Digital vehicle inspections are provided with every service.

At our St. Paul Park auto repair shop, we’re upfront and honest about what your car needs—no gimmicks, no pressure. Our focus on digital inspections and transparent communication builds trust and credibility, ensuring you feel confident in every decision regarding your vehicle.

A Proud Community Partner in Saint Paul Park

Duffy’s Auto Service is more than just a repair shop – we’re a proud part of the St. Paul Park community. We actively support local events and organizations, including St. Paul Park Heritage Days and the Boy Scouts of America, because we believe in giving back to the community that has supported us for decades.

Visit Us Today



When you choose us, you’re not just a customer—you’re part of the Duffy family. Your safety and satisfaction are our top priorities, and we go the extra mile to ensure that every repair and service is done right the first time.

Duffy’s Auto Service has the experience, technology, and dedication to address all your vehicle needs. Come see why we’ve been a trusted name in auto repair since 1961. Call us today or stop by our shop in Saint Paul Park, MN, and let us take care of your car!