Auto Mastery offers engine diagnostics, brake repair, transmission service, and oil change in Yankton. Professional car repair services with reliable results. Contact for expert service today.
I can't say enough about the service I have gotten from Auto Mastery/ John's Service. They have always been down to earth and know what I need and are very friendly. I can do a lot of things on my own but these guys have saved me from myself many times. Thank you so much
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Brad Wahlert
Jan 29, 2026
★★★★★5.0
Great service repair done. Polite and reasonably priced would refer anyone
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Javier Molina
Mar 7, 2025
★★★★★1.0
Unfortunately one of my 3500 dually pick ups was involved in an accident needing body work and the rear axle replaced. The body shop did an excellent job. This establishment whom was hired to install the new rear axle did not. The dash was constantly lit up like a christmas tree, no ABS (which is an out of service) no trailer brakes (also an out of service) no stability trac and no 4WD due to the rear axle censors not working like they should. This vehicle has gone back in 3 times now. The third time around I took it straight to them all they said was “we were hired to replace the rear axle and thats it” well that is precisely what I am havin...Unfortunately one of my 3500 dually pick ups was involved in an accident needing body work and the rear axle replaced. The body shop did an excellent job. This establishment whom was hired to install the new rear axle did not. The dash was constantly lit up like a christmas tree, no ABS (which is an out of service) no trailer brakes (also an out of service) no stability trac and no 4WD due to the rear axle censors not working like they should. This vehicle has gone back in 3 times now. The third time around I took it straight to them all they said was “we were hired to replace the rear axle and thats it” well that is precisely what I am having issues with because either the wiring was damaged or one of the censor improperly installed and or sealed. Long story short they did not fix their improper installation of the rear axle. I suppose its not their responsibility to not properly seal/install wheel speed sensors after replacing a rear axle….. This is a new pick up with only 26,000 miles and also a commercial motor vehicle that gets loaded as heavy as 38,000lbs this issues forced me to put the vehicle out of service.
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Jason Orr
Oct 10, 2025
★★★★★5.0
Mike is very knowledgeable and a great person. I would trust his vehicle advice and trust him to repair what is needed done.
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