A strong exhaust system keeps fumes out, power up, and noise down. If your truck is getting loud, sluggish, or flagged for emissions, heavy-duty exhaust repair brings everything back into spec without disrupting your route.

Truck Exhaust Repair in Mount Horeb, WI
Your exhaust system plays a major role in engine efficiency, emissions control, and driver safety. Leaks or blockages can reduce fuel economy, damage aftertreatment components, and put your team at risk of inhaling toxic fumes. If you smell fumes in your cabin, then this needs IMMEDIATE ATTENTION, as they can cause you to pass out at the wheel.
A faulty exhaust can also see you breach emission regulation standards. If you're found guilty, then you can be fined over $45,000 per non-compliant vehicle.
Here’s what we can repair or replace:
- Exhaust leak repair at the manifold or pipe joints
- Mufflers, resonators, and flex pipe repairs
- DPF and SCR system pipework
- EGR valve replacement and manifold sealing
- Cracked exhaust manifold repair
- Complete exhaust system repair and re-routing
- Emissions sensor replacement and diagnostics
If you’re hearing rattling, smelling fumes, or seeing performance issues, don’t wait. A damaged exhaust can cause engine overheating, failed emissions tests, or even cab contamination. Let us inspect and fix it fast.
Experience the River Valley Difference!
Service Multiple Trucks at Once: We can work on up to six trucks at a time, reducing delays and keeping your business moving.
Customer Service Focus: We explain every repair, answer your questions, and make sure you understand what’s being fixed and why.
Transparent Pricing: We quote it straight, with no hidden labor fees or unexpected charges after the job is done.
Easily Accessible: Our shop is right off I-94 and I-151 in Mount Horeb, WI. Easy to get to, quick to get in, and fully equipped to get you out on schedule.
FAQs
How can I get heavy-duty exhaust repair?
Just call 608-574-5785 and we’ll get your heavy-duty exhaust repair booked. From minor leaks to full replacements, we handle it all—fast and professionally. If you can smell fumes in your cabin, then this requires IMMEDIATE ATTENTION, as they can cause you to pass out at the wheel.
How do I know if my exhaust needs replacing?
Signs your heavy-duty diesel vehicle's exhaust needs replacing include loud noises, visible rust or holes, decreased fuel efficiency, strong exhaust smells, and poor engine performance. Frequent emissions test failures or visible smoke also indicate serious exhaust issues requiring prompt replacement.
Will an exhaust leak cause a check engine light?
Yes, an exhaust leak in a heavy-duty diesel vehicle can trigger a check engine light. Leaks may affect oxygen sensor readings or exhaust pressure, leading the ECM to detect irregularities. Diagnostics will identify the exact issue and help determine if the exhaust system is the cause.
What areas do you serve for heavy-duty exhaust repair?
We are based at 3200 Hwy 78, Mount Horeb, WI, near I-94 and I-151.
As well as Mount Horeb, WI, we also proudly service the following areas: Madison, WI; Janesville, WI; Wisconsin Dells, WI; Beaver Dam, WI; Fitchburg, WI; Middleton, WI; Sun Prairie, WI; Verona, WI; Stoughton, WI; Baraboo, WI; Portage, WI; Lake Delton, WI; Reedsburg, WI; Dodgeville, WI; Monroe, WI; Columbus, WI; Fort Atkinson, WI; Waunakee, WI; and Evansville, WI.
Contact Us About Semi Truck Exhaust Repair Now: Call 608-574-5785!
Exhaust problems only get louder—and more expensive. Call 608-574-5785 today to schedule your semi-truck exhaust repair and get your system sealed, safe, and running clean again. Remember, if you smell fumes in your cabin, then this requires IMMEDIATE ATTENTION, as they can cause you to pass out at the wheel.
What They're Saying About Us
See why our customers consider River Valley Diesel Services & Construction their go-to repair shop in Mount Horeb, WI and the surrounding areas!
I was in a jam and they came out and got me fixed up quick I would definitely recommend them if you’re in a jam
Contact Us
Need roadside assistance, have questions, or want to schedule your truck or trailer in for a service or repair? Get in touch, we're open Monday through Friday from 7:00am to 5:00pm.