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By 7015070764 July 3, 2026
2023 GMC Acadia AT4
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2025 Audi A5 Sportback S Line Premium 45 TFSI Quattro
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2019 Chevrolet Silverado 1500 4WD Crew Cab 147" LT Trail Boss
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2012 Ford Super Duty F-250 SRW 4WD SuperCab 142" Lariat
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2016 Volvo XC90 AWD 4dr T6 Inscription

Automotive Sales, Service, and Repair

Hartford, WI | Erin, WI

12-Month/24,000-Mile Warranty on All Auto Repairs

We Work With All Insurance and Aftermarket Warranty Companies

Carfax Top-Rated Dealer

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Your Trusted Auto Repair Partner in Hartford

M&J Auto Sales & Service has been serving Hartford and surrounding communities since 2009. We're a locally owned, family-run shop where you'll find ASE-certified technicians with over 75 years of combined experience working on your vehicle. This level of skill means we've diagnosed and repaired just about everything that can go wrong with a car. We also offer quality used cars for sale in Hartford, WI and the surrounding areas.

We believe in treating every customer the way we'd want to be treated ourselves. This approach has earned us a strong reputation and recognition as a CARFAX Top-Rated Dealer. We back our work with a 12-month/24,000-mile on all auto repairs parts and labor nationwide warranty so you can drive away with peace of mind. Contact us today!

Why Choose Us

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ASE Certified Technicians

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Quality Service

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Great Reputation

M&J Auto Sales & Service
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12-Month/24,000-Mile Warranty

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Works With All Insurance and Aftermarket Warranty Companies

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CARFAX Top-Rated Dealer

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Auto Repair Services

From diagnostics to complex mechanical repairs, our team handles everything your vehicle needs to keep running smoothly and safely on the road.
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Car Maintenance Services

Regular maintenance extends your vehicle's life and prevents costly breakdowns. We'll keep your car performing at its best with scheduled service.
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Exhaust System Repairs

Hear something loud or smell something off? Our technicians can diagnose and repair exhaust issues to restore performance and efficiency.
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Professional Tire Service

We offer tire sales, installation, balancing, and rotations to make sure you've got the right rubber for Wisconsin roads and weather conditions.
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Wisconsin State Emissions Testing Facility

M&J Auto Sales & Service provides expert emissions-related diagnostics and repairs to help your vehicle meet Wisconsin state emissions requirements.

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Professional Tire Service

We offer tire sales, installation, balancing, and rotations to make sure you've got the right rubber for Wisconsin roads and weather conditions.
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Expert Used Vehicles

Looking for a reliable pre-owned vehicle? We sell quality used cars that have been thoroughly inspected by our experienced team.

Our Recent Projects

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Here's what our satisfied customers are saying...

At M&J Auto Sales & Service, we take pride in providing exceptional auto services to our customers. We would be grateful if you could share your thoughts about our business with others. Your feedback helps us improve and helps others make informed decisions. Please take a moment to leave a review of M&J Auto Sales & Service and let others know what you think.

  • How does your team ensure high standards of quality for every visitor?

    Our family-run shop brings a dedicated approach to automotive care by utilizing certified technicians with decades of collective experience. We look at every vehicle thoroughly to ensure that we address your mechanical problems correctly the first time around. Beyond our standard repair and maintenance options, our dealership side provides exceptional support if you are browsing our diverse inventory of used cars for sale in Hartford, WI. We maintain open communication throughout the entire diagnostic process so you always feel completely confident in the reliability of our work. Our team focuses on delivering reliable results that keep your vehicle operating smoothly on local roads.

  • What should customers expect when discussing diagnostic findings with your technicians?

    We believe in full transparency, which means our professionals will clearly explain what your vehicle requires without using confusing industry jargon. Our team reviews the mechanical issues discovered during our inspection and maps out a clear path forward for repairs or maintenance. If you happen to be visiting us to explore the premium pre-owned options among our used cars for sale in Hartford, WI, we provide the very same honest insight regarding vehicle history and overall condition. 

  • How do your professional background and industry credentials benefit vehicle owners?

    Our deep automotive background means our technicians possess the specialized knowledge required to accurately identify complex mechanical problems. Having navigated countless unique repair scenarios over the years, we possess the practical skills to handle everything from routine maintenance to intricate engine diagnostics. This extensive field experience also allows us to carefully select and inspect the inventory of used cars for sale in Hartford, WI that we offer to the public. By combining technical proficiency with a dedication to old-fashioned customer care, we ensure your vehicle receives the precise attention it deserves. Your safety remains our ultimate priority during every service.

  • In what ways does your shop accommodate different automotive protection plans?

    We strive to make the financial aspect of automotive service as seamless as possible by collaborating with a wide variety of coverage providers. Our staff regularly coordinates with different insurance firms and major aftermarket warranty organizations to help streamline your claims process. This adaptable approach extends to individuals looking at the available used cars for sale in Hartford, WI, as we help you understand how different protection plans apply to your purchase. We manage the detailed paperwork and direct communications with these companies so you can focus entirely on getting back on the road. We work hard to minimize your out-of-pocket stress.

  • What core philosophy guides your daily interactions with the local community?

    Our business operates on the simple golden rule of treating every single visitor exactly how we would prefer to be treated ourselves. This foundational principle influences how we answer your questions, perform mechanical repairs, and structure our fair pricing. Whether you are bringing your current vehicle in for necessary tire maintenance or checking out the reliable used cars for sale in Hartford, WI on our lot, you will receive honest, personalized care. We completely reject high-pressure sales tactics, choosing instead to focus on building sustainable, long-term relationships with drivers throughout our neighborhood. Your comfort and satisfaction guide our business.

  • How does your status as a recognized top-rated dealer influence your customer care?

    Receiving top honors from leading vehicle history platforms motivates our team to uphold superior service standards across all departments. This recognition reflects our historical consistency in providing honest vehicle assessments, transparent history reports, and dependable mechanical repairs. We apply these exact benchmarks when evaluating the quality of our pre-owned inventory, ensuring that the used cars for sale in Hartford, WI meet our strict criteria before they ever reach you. We know that buying a vehicle or getting major repairs represents a significant investment, and we honor that by delivering consistent accountability.