Gary's Auto Service
“My service was done with updates of the mechanic's evaluation, estimate and his comments along the entire process of repair.”
Best Engine Repair & Rebuild near Florissant, MO
2 of these technicians are based in Florissant; the others serve Florissant from towns including St. Louis (12 mi), St. Charles (10 mi) and Ferguson (4 mi).
3 open weekends · 10 rated 4.5+
Data verified October 19, 2026
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Ronsick's Auto Care
“I arrived on time for appointment and my car was in the shop within minutes.”
Ferguson Motor Service
“Saved us almost $2500 over a previous mechanic's bid for the repairs on our 2013 Ford Escape!”
T&G Motorsports
“Best mechanic in North St Louis county.”
Hayes Engine Management Inspections
“They fixed the problem with my wheels and he also held my car while I got the money together and didn't charge extra.”
Sparks Tire & Auto
“They admitted it was their error and would fix it and did so at no extra cost the very next morning.”
Listed for drivers in and around Florissant, MO, these 15 shops repair, rebuild and replace engines. What each one says about machine work, warranty terms and the engines it supplies comes from its own website; ratings and quotes come from public reviews.
Area overview: Florissant, MO
The 15 technicians on this page are rated from 4.1 to 4.9 across 3,425 reviews; 14 have 50 or more reviews and 10 are rated 4.5 or higher. When customers rate these technicians on specific qualities, they most often praise professionalism (92%), quality (81%) and value (65%). The topics that come up most in reviews of the technicians on this page are "diagnosis" and "fair". 3 are open on Saturdays. 3 list staff certifications (ASE) and 8 have a BBB rating of A or A+. Domain records put 9 websites of the technicians on this page at ten or more years old; the oldest dates from 2000. 4 offer financing; 1 gives free estimates; 4 are family- or locally-owned and 6 list coupons or special offers. We have a website on file for 14 of the technicians on this page; 10 publish a contact page and 3 list a public email. 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.
Why do some listings show another city?
2 of the 15 shops are in Florissant itself and the rest come from other towns within 15 mi. An engine job means leaving the car for days, so the drive happens once at each end rather than every morning.
Benchmark Auto Repair
“Quick service at a fair price for everything from engine problems to an oil change.”
Coffey Automotive
“Coffey has a professional team I trust, and the experience and knowledge you can count on.”
Greg's Auto Service and Repair
“I always trust his business' expert service!”
Certified Motor Co
“Very nice and honest guy want rip you off”
GLB Motorworks
“If you have a pre 2007 jaguar, this is the place to fix it.”
Certified Transmission & Auto Repair
“Got me in faster than fast when I couldn't wait 3 hours at a place on Page!”
Aamco Transmissions & Total Car Care
“I just got my 2013 Nissan Maxima looked at and they told me everything that was wrong…it was good quality service.”
Bradley Motor Werke
“I purchased a used bmw and Dan and his guys took real good care of it to get it back running great!”
Nocturnal Motorworks
“The customer service is great and they always do excellent work on my cars.”
Why these companies made our list
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