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MJ's Sinclair is a locally owned and operated automotive service center founded in 2014. We strive to deliver quality products to our customers. Our convenient location and accommodations make us an enjoyable stop for motorists across Brown County, Day County, Spink County, and Marshall County. For auto repair services,preventive maintenance, new tires, and custom wheels, come see the team at MJ's Sinclair .
Owned by Jeffrey Amdahl, MJ's Sinclair is open seven days a week. Our facility includes a gas station, food and refreshments, car wash, and casino room. We're proud to serve Groton, SD, Hecla, SD, Conde, SD, Langford, SD, Roslyn, SD, and surrounding communities.
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Our mechanics have been servicing vehicles at MJ's Sinclair for the last