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FS Autoworx is a family-owned diesel repair shop and diesel performance center serving Monroe, WA, and the surrounding Snohomish County area. Specializing in diesel and gas vehicles across all makes and models, including domestic, import, and European, the shop offers engine tuning, engine overhauls, turbo installations, lift kits, exhaust systems, brake upgrades, lighting, and custom performance builds. Certified technicians with nearly 20 years of experience deliver reliable repairs, warranty-backed workmanship, and competitive pricing with no corners cut. Military and senior discounts are available. Schedule an appointment with FS Autoworx today.
Had them change out the grill on my MB since I was going to keep it, They did an awesome job! Looks like it came from the factory! Can't say enough about how well this turned out. Stellar job!
DW
Daryl W
Jul 23, 2026
5.0
I want to thank Jeremy and FS Autoworx for doing a great job on my 2008 Sequoia. For me, when getting vehicle work done, I value 2 things; honesty and value. Jeremy does a great job with both. I can highly recommend FS and will keep going back. Thanks again Jeremy!
JJ
Jack
Jul 15, 2026
5.0
Jeremy, the owner, was very helpful. He installed a Turbo 4 inch exhaust pipe, a number of other things than afterwards. I had trouble with my truck, which a few push rods were bent rocker. Arm broken, he fixed those and got me on my way home. From washington state to southern california, very fast service.Great prices and a great guy to deal with.
I would highly recommend his shop to anybody that needs any work done. Mine was a diesel, but any vehicle he works on. He does. He will do a great job thumbs up.If there was ten stars, I'd give em a ten
ML
Madeline Losee
Jul 14, 2026
5.0
My ’93 F-250 diesel decided to develop brake issues on a hot Friday evening in Monroe, which is about as fun as it sounds.
I went to Les Schwab because they’d replaced my tires recently. The sweet young man sent me over to FS Autoworks who he felt could better diagnose. These older trucks are quirky! The owner, Jeremy, took the time to figure out what was actually going on—with some crazy old school electrical trick— stayed with it right up until closing, and got me safely back on the road that day.
What I appreciated most was the communication. He explained the issues clearly, helped me prioritize what needed to be addressed, and was mindful of cost constraints without ever compromising safety. As someone going through a divorce and trying to keep an old truck, a cabin renovation, and life in general moving forward, that meant a lot. I really felt so taken care of and trusted every recommendation.
If you have a Diesel Truck, or any truck, FS Autoworx is the place to go. It’s hard to find people who are both knowledgeable and honest. Jeremy was both. Will never take my truck anywhere else again and I have a feeling these guys will keep it running in the 300-500k mileage range these trucks are capable of!
Highly recommend!
JC
John Crowe
Jul 10, 2026
5.0
I had And the oil pan upgrade on my LBZ 2006 Austin the mechanic did an outstanding job. He was meticulous appreciate all of his great work in my truck I would Recommend this shop Thank You Jermey
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Certified August 30, 2026Yext Knowledge Graph
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