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Business Details
50+ Years
experience
Trusted Auto Repair Services in Portland, OR
We are ASE Certified technicians with decades of experience in under-car optimization, repair, and restoration. Since 1950, our Oregon-based company has served Portland Metro, Southwest Washington, and the Pacific Northwest with premium auto parts and budget-conscious solutions. Our team prioritizes customer satisfaction through competitive pricing, free brake inspections, and timely service using high-quality components. We specialize in exhaust systems, catalytic converters, drive axles, suspension repairs, and fleet services for large trucks, motorhomes, and RVs.

Our expertise extends to diagnostics, DEQ inspection preparation, and performance upgrades like headers and air intakes. Trusted by local governments, police departments, and private collectors, we combine technical proficiency with transparent communication to meet diverse automotive needs.
Services
Exhaust Systems Catalytic Converters Brakes Installation Drive Axles & Suspension Repairs Fleet Service
Details
  • Year established: 1950
Highlights and features
  • We are ASE Certified technicians with decades of experience.
  • Our company has served the Pacific Northwest since 1950.
  • We offer free brake inspections and budget-friendly solutions.
  • We service fleets, large trucks, RVs, and motorhomes.
  • Our team uses premium quality auto parts for optimal repairs.
Associations and certifications
  • ASE Certified
What people say
Wonderful staff Pleasant and helpful Excellent customer service No hidden fees Free inspection
Services
Exhaust Systems
We diagnose and replace exhaust systems, including manifolds and mufflers, using premium parts. Our technicians ensure optimal performance and compliance with emission standards. Services include leak detection and DEQ inspection preparation for vehicles of all types.
Catalytic Converters
Our team provides diagnostics and replacement for catalytic converters and O2 sensors. We use high-quality components to restore vehicle efficiency and meet environmental regulations. Services include emission control system checks and repairs.
Brakes Installation
We offer free brake inspections, noisy brake repairs, and replacement parts. Our technicians diagnose issues with itemized options and written estimates. Services include installation of quality brake components for improved safety and performance.
Drive Axles & Suspension Repairs
Our services include repairing drive axles, shocks, and struts. We address wear and damage to ensure smooth handling and vehicle stability. Technicians use premium parts for durable repairs on personal and commercial vehicles.
Fleet Service
We specialize in servicing large trucks, RVs, motorhomes, and commercial fleets. Our team handles diagnostics, repairs, and preventive maintenance for businesses and government agencies. Services include DEQ preparation and emission control for fleet compliance.
Questions
What services does Master Muffler & Brakes offer?
We specialize in exhaust systems, catalytic converters, brakes, drive axles, suspension repairs, and fleet maintenance for personal and commercial vehicles.
Do you provide free inspections?
Yes, we offer free brake inspections and diagnostics to identify repair needs and provide transparent estimates.
Can you prepare vehicles for DEQ inspections?
Yes, we diagnose and repair emission control systems to ensure vehicles pass DEQ inspections successfully.
Do you service large vehicles and fleets?
Yes, we handle repairs and maintenance for large trucks, RVs, motorhomes, and commercial fleets.
Are your technicians certified?
Our team includes ASE Certified technicians with decades of experience in automotive repair.
What areas do you serve?
We serve Portland Metro, Southwest Washington, and the Pacific Northwest with four convenient locations.
Reviews (6)
Dexter Linde
Jun 07, 2022 Report
They fixed my catalytic converter free of charge, thank you guys very much. very quick work too Services: Exhaust, Auto maintenance
Kendall Sweeney
Apr 11, 2022 Report
Mike is a cool guy! I had to have 4 flat wiring installed on my Rav-4 (in order to pull a U-Haul)- no one was able to fit me in, but it just so happened, Mike's staff was capable of the job- and they were able to fit me in! *looks dreamlike at staff* "My heroes!".
Paul Dh Benedict
Mar 14, 2022 Report
Donny really went above and beyond for us. He stayed late to finish replacing a stolen cat on my beloved '89 motorhome. He also addressed some extra problems free of charge. Overall bill was very reasonable. It seems really important to him to do right by his customers, and that's very appreciated.
Kenneth Foreman
Feb 23, 2022 Report
I own a motorcycle he doesn't work on them but he does welding I had a part that kept on braking off and I took it to him 2 times and he fixed it free of charge I think he is friendly great guy if I owned a car he would be the one I would go to for sure.
Patty Jacobs
Nov 21, 2021 Report
I had an attempted catalytic converter theft - they didn't get the cat, but did cut a couple of nice slices in my exhaust pipe. These guys welded it for free! Donny was so helpful, and they were quick and so much less of a hassle with insurance, and quotes, and photos and deductible, etc. I so appreciate this! Service: Exhaust
Daylynn Allis Lambi
Nov 12, 2021 Report
Like just about everyone else in my neighborhood with a Honda Element, I had someone saw through a nice chunk of my exhaust pipe in an attempt to steal my catalytic converter yesterday, before being scared off by my neighbors. Multiple people recommended Master Muffler to me. Donny is so kind - got me in immediately, didn't charge for the weld (to "support the community", since this is so rampant), got me a Miller Cat Shield, and installed it all in about 2 hours. I'm really grateful to have them in the neighborhood.