Forest Twp's Trusted Auto & Diesel Shop
From daily drivers to heavy-duty diesels, County Line Auto and Diesel Repair keeps you rolling with straight-talk diagnostics, fair pricing, and work you can count on.
What We Do
Whether it's a routine oil change or a complex diesel repair, we've got the skills and equipment to get it done right the first time.
Modern vehicles demand modern tools. We use advanced scan tools to pinpoint check-engine lights, misfires, and electronic faults — fast and accurately.
Conventional, synthetic, and high-mileage blends — we'll match the right oil to your vehicle and top off all critical fluids while we're at it.
Pads, rotors, calipers, and fluid — our brake work keeps you stopping confidently. We inspect every component and explain what needs attention.
From Ford Power Stroke to Cummins and Duramax, we diagnose and repair diesel engines — fuel systems, turbochargers, EGR, and beyond.
Don't ignore that light. We'll read the codes, explain what's actually wrong, and give you an honest recommendation — not a upsell.
Suspension, steering, belts, hoses, filters — we handle the repairs and preventive maintenance that keep your vehicle safe and reliable.
About Us
County Line Auto and Diesel Repair is a locally owned shop right here in Forest Twp. We know what it means to depend on your vehicle — whether it's getting to a job site, hauling a trailer, or making the school run.
We treat every customer the way we'd want to be treated: with honesty, clear communication, and a commitment to doing the job right. No surprises on the bill. No unnecessary work. Just solid mechanics and fair prices.
We tell you what needs attention now, what can wait, and what you can skip — so you're never paying for work you don't need.
Right on County Line Road — easy to find, easy to drop your vehicle off, and close to home.
We communicate timelines upfront and work to get you back on the road as quickly as possible.
Customer Feedback
We let our work speak for itself — but here's what the people who drive through our bay have to say.
"Brought my truck in for a check-engine light and they figured it out the same day. Explained exactly what was wrong and didn't try to sell me anything I didn't need. That's rare."
"I've been bringing my diesel here for years. They know these engines inside and out, and the pricing has always been fair. I wouldn't take my truck anywhere else."
"Had an emergency brake issue on a weekend and they got me in quickly. The work was done right and the bill was exactly what they quoted. Honest shop — I recommend them to everyone."
Ready to Get Started?
Give us a call or stop by the shop. We'll figure out what your vehicle needs and give you a straight answer — no fluff, no pressure.
Get in Touch
We're located right on County Line Road in Forest Twp. Drop by during business hours or give us a call — we're happy to answer questions before you bring your vehicle in.
6890 County Line Rd
Forest Twp, MI 49765-9570
Monday – Friday: 8:00 AM – 5:00 PM
Saturday – Sunday: Closed
Thanks for reaching out. We'll get back to you as soon as possible. You can also call us at (989) 619-4503.
