LTS Automotive
“Most recently, LTS was incredibly helpful and flexible with me while I dealt with a complicated insurance situation.”
Best Car Inspection & Emissions Testing in St. Charles, MO
15 stations listed · 11 in St. Charles · 3 open weekends · 11 rated 4.5+
Data verified October 19, 2026
Ace Tire & Auto Services
“Dennis took the time to explain the breakdown of the total cost as well as showed me the parts he replaced and why.”
Aamco Transmissions & Total Car Care
“Transmission went out on the pickup, but the professionals had us fixed up in a few days.”
Transmissions and More
“After being let down for months at different dealers ,transmissions and more diagnosed correctly and promptly fixed the problem while saving me a substantial amount of money.”
Lindenwood Auto Service
“When you want it done right and a no non sense approach mentality, LINDENWOOD AUTO, this is the place.”
K & B Performance
“There has been times my vehicle has giving me problems and he's stayed over closing time to fix it, He's even came in on his days off to help me out.”
Listed for drivers in and around St. Charles, MO, these 15 shops carry out emissions and inspection work. What each one says about its station license, hours and retest policy comes from its own website; ratings and quotes come from public reviews.
Area overview: St. Charles, MO
Of the 15 stations we list here, 11 are in St. Charles itself and 4 come from St. Peters (5 mi). The stations on this page are rated from 3.8 to 5.0 across 3,031 reviews; 14 have 50 or more reviews and 11 are rated 4.5 or higher. The topics that come up most in reviews of the stations on this page are "price", "honest" and "fair". 3 are open on Saturdays. 3 list staff certifications (ASE) and 7 have a BBB rating of A or A+. 11 have ten or more years of experience, the longest 49 years. 3 offer financing; 1 gives free estimates; 5 are family- or locally-owned and 5 list coupons or special offers. We have a website on file for 13 of the stations on this page; 9 publish a contact page; 3 list a public email and 3 take bookings online. We count these figures across the stations on this page; distances are straight-line, and hours and prices change, so confirm the details with the station before you visit.
Can I book a test online with shops listed for St. Charles?
3 of the 15 shops here take bookings online. Some stations work on a queue instead, which is fine early in the month and painful at the end of it. If you can book, take the first slot of the day and you will be out before the line forms.
Robert's Automotive Service Center
“They are always very fair and I feel like they don't try to take advantage of me just because I don't know a lot about cars.”
Zeisler Automotive- Saint Charles
“Been going to these guys for 8 or so years, always honest service and prices 👍👍👍 Gabe Jones”
Fred's Complete Car Care
“They were able to get me in for an emissions inspection that day.”
St Charles Foreign Car Inc
“Ive been taking my Porsche to get serviced here for years, 5 Stars.”
Missouri Auto
“Super nice people and great to work with!”
Cintech Automotive Repair
“Great, Awesome autoshop, Cintech Auto is very friendly, fast and quick, very helpful when it comes to their customers.”
Western Tire & Auto
“The did a really good job fast service at a decent price and Terry the Manger was spot on ,on the price”
Frecks & Sons' Automotive Inc.
“A little pricy but they truly do a great job.”
Complete Auto & Exhaust
“They were able to help me with my car and answer all the questions I had very thoroughly and in a way I can understand.”
Why these companies made our list
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