Car Maintenance Services

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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Reliable Car Maintenance Services That Keep You Moving

At M&J Auto Sales & Service, we've built our reputation on honest work and quality service since 2009. Our ASE certified technicians bring over 75 years of combined experience to every job, treating your vehicle with the same care we'd give our own.

As a locally owned, family-run shop serving Hartford, WI, we understand what it means to stand behind our work. That's why we back every service with a 12-month/24,000-mile warranty on all auto repairs. Give us a call today to schedule your next maintenance appointment.

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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Car Air Filter Replacement

Clean air filters help your engine breathe easier and run more efficiently. We'll swap out your old filter quickly, ensuring your car performs the way it should.
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Car Fuel System Services

Dirty fuel systems can rob your car of power and efficiency. Our thorough cleaning services restore your vehicle's performance and help prevent costly repairs down the road.
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Oil Change Assistance

Regular oil changes are the foundation of vehicle longevity. We'll get you in and out with fresh oil that keeps your engine protected and running strong.

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.