FS Autoworx is a trusted engine repair shop in Monroe, WA, specializing in repairs and upgrades for all vehicle types—diesel, domestic, import, and European. Our skilled technicians handle engine repairs, performance boosts, and custom modifications with precision. Whether your car or truck needs engine diagnostics, lift kits, brake upgrades, exhaust systems, or turbo installations, FS Autoworx delivers exceptional craftsmanship. We also perform engine swaps, lighting upgrades, tuning, and unique custom work tailored to your vision. For reliable service at an engine repair shop in Monroe, WA, contact FS Autoworx today and experience automotive care that brings your vehicle dreams to life.
I ended up here after trying a couple other repair shops due to an ongoing issue with my truck. Jeremy and his crew went above and beyond to make sure that the problem was solved.
JK
James Kingham
Feb 10, 2026
5.0
I went to FS Autoworx for the first time. They did a routine oil/filter change, and also did the first service of the 10-speed transmission on my 2022 Ford F350 King Ranch pickup. All was good, completed on time, and friendly feedback from the front office team. Happy customer!
ER
Eartha Ranhofer
Feb 3, 2026
5.0
It is hard to find shops that know both Cayenne's and particularly Cayenne diesels. Glad we found FS Autoworx
JB
Joe Bahr
Dec 23, 2025
5.0
My experience at FS Autoworx was amazing! Everyone works extremely well together. I highly recommend this shop for your repair needs.
JS
Jordyn Shawger
Dec 15, 2025
5.0
They are always happy to see my husband coming for upgrades on turbos and such but also cheerful and ready to do mundane tasks like oil changes for me! They also go above and beyond, during a routine oil change they spotted a faulty gasket that would eventually cause damage. They worked with my warranty to get as much covered as possible! And in addition during the tedious repair process found some items with basic ware and opted to just replace now while they had the easy access the original repair had offered! And not to mention so quick with the work. A huge project as it was, plus some other things like another oil change and brakes, all only took 3 business days! FS and the team are our go to shop for the big upgrades and the basics!