Sparks Tire & Auto
“I needed to get help with my German auto, and did not think it would be so hard to find one, but I was directed to Sparks and they were able to get my problem fixed.”
Best Car Tune-Up in St. Charles, MO
15 technicians listed · 13 in St. Charles · 2 open weekends · 12 rated 4.5+ · 1 shows a license
Data verified October 19, 2026
Riverside Auto Service
“Took my son's car to Riverside Auto Service to have a engine installed and when I tell you they are professional, and fair with pricing and advice.”
CAL Automotive
“Making an appointment was super easy and they were able to diagnose and fix the issues I was having with my vehicle.”
K & B Performance
“They explain the problem completely and always point out extra current or future problems.”
Robert's Automotive Service Center
“I was a few minutes early but left about 10 minutes with my car waiting at the front door.”
Zeisler Automotive- Saint Charles
“Had new tires put on today, and they jad ne in and out in no time at all, and at a great price.”
Listed for drivers in and around St. Charles, MO, these 15 shops handle tune-up work and running faults. What each one says about diagnostics, warranties and service specials comes from its own website; ratings and quotes come from public reviews.
Area overview: St. Charles, MO
Of the 15 technicians we list here, 13 are in St. Charles itself and 2 come from St. Peters (1, 5 mi) and Bridgeton (1, 6 mi). The technicians on this page are rated from 3.8 to 5.0 across 1,400 reviews; 9 have 50 or more reviews and 12 are rated 4.5 or higher. The topics that come up most in reviews of the technicians on this page are "price", "honest" and "fair". 2 are open on Saturdays. 1 shows a license on its website; 3 list staff certifications (ASE) and 5 have a BBB rating of A or A+. Domain records put 4 websites of the technicians on this page at ten or more years old; the oldest dates from 2004. 1 offers financing; 3 are family- or locally-owned and 3 list coupons or special offers. We have a website on file for 10 of the technicians on this page; 8 publish a contact page; 5 list a public email and 2 take bookings online. We count these figures across the technicians on this page; distances are straight-line, and hours and prices change, so confirm the details with the technician before you visit.
Which shops listed for St. Charles open on Saturdays or Sundays?
2 of the 15 shops here show Saturday or Sunday hours. Plugs and filters fit neatly into a Saturday. A chase for an intermittent misfire does not, since it can need the car overnight to catch the fault happening from cold.
Lunds Engine and Machine
“The total price turned out to be cheaper then what he had originally quoted me.”
Duncan Transmission
“Goes the extra steps to make sure everything works and works better than the original.”
Stiegemeier Porting Services
“These guys have been doing this for a long time and they do an outstanding job.”
St Charles Foreign Car Inc
“Both of my sons have sent their Triumph Spitfires, one for extensive restoration of brakes and clutch and the other for aftermarket carb repair , to him with fair and reliable results .”
Waterson Motorsports
“Real nice people here very professional service enjoyed my experience”
Old School Customs
“Great frame work an matching paint job”
Redwater Customs & Repair
“Amazing Place, they will be 1000% honest and fix what needs to be done!”
Missouri Auto
“Super nice people and great to work with!”
Cintech Automotive Repair
“Honesty is hard find anymore but this place was straight forward and works hard on our cars like we work hard for our money.”
Why these companies made our list
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