About

About Thelen Mazda: Serving Bay City & Mid-Michigan Since 1977!




Thelen Mazda is a family-owned and operated Mazda dealership in Bay City, Michigan, proudly serving drivers from Saginaw, Midland, Mount Pleasant, and the entire Great Lakes Bay Region since 1977. As part of the Thelen Auto Group, our dealership is built on a legacy of trust, integrity, and customer-first values that have spanned three generations.

With over 48 years of continuous service, Thelen Mazda has deep roots in Mid-Michigan, supporting the driving needs of our community with honesty and care. Operated by the Thelen family for three generations, our focus has always been on relationships, not transactions. We take pride in helping generations of drivers find the ideal vehicle that fits their lifestyle and budget. Known across Michigan for exceptional customer service and reliable automotive expertise, Thelen Mazda remains a trusted name in Mazda sales and service throughout the region.

Explore the latest 2025 and 2026 Mazda models, including the CX-5, CX-50, CX-90, Mazda3, and MX-5 Miata—each crafted with advanced technology, safety, and Mazda’s signature performance. We also carry Mazda Certified Pre-Owned vehicles and a wide selection of quality used cars, trucks, and SUVs for every budget. If you can’t find the Mazda you’re looking for, our experienced team can locate or custom-order your vehicle through our nationwide Mazda network.
Our finance experts provide flexible leasing and financing solutions tailored to your budget. Whether you have great credit, are rebuilding, or buying your first car, we’ll help you take advantage of current Mazda incentives and special offers to get you on the road with confidence.

Thelen Mazda’s state-of-the-art Mazda service center features skilled, Mazda-certified technicians who use the latest diagnostic tools and genuine Mazda OEM parts. From oil changes and brake service to body repair and detailing, our goal is to keep your Mazda running safely and performing at its best. You can also personalize your vehicle with authentic Mazda parts and accessories available through our well-stocked Parts Department.
For over four decades, Thelen Mazda has offered Mid-Michigan drivers a dealership experience built on trust, transparency, and family values. With a long history of excellence and personal attention, we’re committed to delivering a seamless and enjoyable experience at every visit.

Visit Thelen Mazda in Bay City, MI, and experience the family-owned difference our customers have trusted since 1977. See why drivers from Saginaw, Midland, and Mount Pleasant choose us for Mazda sales, service, and genuine OEM parts. Your perfect Mazda awaits—let our family help yours find it today.


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Sales
Day Open Closed
Monday 8:30AM 8:00PM
Tuesday 8:30AM 6:00PM
Wednesday 8:30AM 6:00PM
Thursday 8:30AM 6:00PM
Friday 8:30AM 6:00PM
Saturday 9:00AM 3:00PM
Sunday Closed Closed
Service
Day Open Closed
Monday 8:00AM 8:00PM
Tuesday 8:00AM 5:30PM
Wednesday 8:00AM 5:30PM
Thursday 8:00AM 5:30PM
Friday 8:00AM 5:30PM
Saturday Closed Closed
Sunday Closed Closed
Parts
Day Open Closed
Monday 8:00AM 8:00PM
Tuesday 8:00AM 5:30PM
Wednesday 8:00AM 5:30PM
Thursday 8:00AM 5:30PM
Friday 8:00AM 5:30PM
Saturday Closed Closed
Sunday Closed Closed




Community Commitment at Thelen Mazda

At Thelen Mazda, we believe in giving back to the community that supports us. We proudly sponsor a variety of local organizations, events, and charities, including:
  • American Cancer Society
  • Cool City Classic Car Show
  • Bay City Fireworks Festival
  • Tall Ship Celebration
  • Hell's Half Mile Film and Music Festival
  • Bay City State Theater
  • Toys for Tots
  • Delta College
  • Northwood University
  • Salvation Army
  • Bijou Orchestra
  • And many more!
We invite you to contact our owner, Joe Thelen, who is always available to speak with you. His office is conveniently located next to our Subaru showroom. Whether you have questions, comments, or concerns about your experience with Thelen Mazda, please reach out. Your feedback helps us enhance the customer experience, ensuring you feel like family at Thelen.

We look forward to serving you and making a positive impact on our community!