Duncanville Automotive & Muffler has been a trusted name in auto repair since 1976. What started as a simple muffler and brake shop has grown into a full-service automotive repair facility serving the greater Duncanville area and beyond. With 8 lifts and 9 bays, we’re equipped to handle everything from basic maintenance to complex repairs. Over the years, we’ve built a reputation for honest work, fair prices, and friendly service that treats every customer like family.

Carrying On The Family Tradition

Nathan Threadgill, the current owner of Duncanville Automotive & Muffler, grew up just down the road in Midlothian, Texas. His family’s connection to the shop began in 1992 when his dad purchased it from Nathan’s uncle, who originally founded it in 1976. Nathan started working part-time at the shop at just 17 and, after a brief time away, returned to help get things running right—introducing modern systems, including computerized operations, and bringing the business into the 21st century. With 22 years of hands-on experience at the shop, Nathan continues to carry forward his family’s legacy of integrity and hard work. Outside the shop, he’s a proud father of four—two boys and two girls—and enjoys cross-country dirt bike riding with his kids.