Copyright © 2026. All Rights Reserved.
Carplex Cars - Trusted Used Car Sales & Auto Repair Services in Barnhart, MO
Quality Pre-Owned Vehicles, Professional Auto Repair, Oil Changes, Brake Service, Diagnostics, Tires, Detailing & More. All Under One Roof in Barnhart, Missouri.
WHY CHOOSE CARPLEX AUTO SALES & REPAIR SERVICES?
Your Trusted Used Car Sales & Auto Repair Services in Barnhart, MO
- Experienced Automotive Technicians: Every vehicle in our inventory is carefully inspected to provide reliability, value, and peace of mind for our customers.
- Honest Recommendations: Our skilled technicians have the knowledge and experience to diagnose, repair, and maintain domestic and foreign vehicles.
- Fair & Competitive Pricing: Quality automotive service shouldn’t break the bank. We offer affordable solutions and a 10% discount for senior citizens.
- Complete Automotive Solutions: From vehicle sales to repairs, detailing, tires, diagnostics, and maintenance, Carplex is your one-stop automotive destination.
- Convenient Barnhart Location: Located at 7231 Old Highway 21, Barnhart, MO 63012, we’re easily accessible for drivers throughout Jefferson County and nearby communities.
OUR SERVICES
From routine oil changes and brake repairs to engine diagnostics, suspension work, electrical troubleshooting, vehicle detailing, and preventive maintenance, we help keep your vehicle running safely and reliably for years to come.
When your check engine light appears, trust Carplex to identify the cause quickly and accurately. Using advanced diagnostic equipment, we troubleshoot engine performance issues, emissions problems, electrical faults, sensor failures, and drivability concerns to help prevent costly repairs and keep your vehicle operating efficiently.
Regular oil changes are one of the most important services for maintaining your engine’s health and performance. We provide professional oil change services using quality oils and filters designed to protect your engine, improve efficiency, and extend vehicle life. Drivers throughout Barnhart, Imperial, Arnold, and Jefferson County.
Our brake services include brake inspections, brake pad replacement, rotor replacement, brake fluid checks, and complete brake system diagnostics. If you’re experiencing squeaking brakes, vibration, reduced stopping power, or warning lights, our technicians can quickly identify and resolve the issue.
Proper tire maintenance improves safety, handling, and fuel economy. We offer tire installation, tire balancing, tire rotations, tire inspections, wheel services, and professional wheel alignment. Whether you need new tires or alignment correction, our team helps maximize tire life and improve driving performance.
Stay comfortable year-round with professional air conditioning and heating system services. We perform A/C diagnostics, refrigerant services, compressor repairs, heater repairs, climate control troubleshooting, and complete HVAC system maintenance for all vehicle makes and models.
A properly functioning suspension system provides a smooth ride and improved vehicle control. Our suspension and steering services include shocks, struts, steering components, suspension inspections, and alignment corrections. We help drivers throughout Barnhart and Jefferson County enjoy comfortable driving experiences.
ABOUT CARPLEX CARS
At Carplex Auto Sales & Repair Services, we believe buying and maintaining a vehicle should be simple, affordable, and stress-free. Conveniently located on Historic Old Highway 21 in Barnhart, Missouri.
We proudly provide quality used vehicle sales and professional automotive repair services to drivers throughout Barnhart, Imperial, Arnold, Kimmswick, Festus, Crystal City, Pevely, Herculaneum, and surrounding Jefferson County communities.
- Quality Vehicles You Can Trust
- Experienced Automotive Technicians
- Fair & Competitive Pricing
- Honest Diagnostics
- Trusted by Enthusiasts
Garett Rose
2 weeks ago
I had a phenomenal experience at Carplex/One West Auto. I found a great, reliable vehicle priced very fair. I left feeling respected, and taken care of. I would recommend coming here to everyone! Joe was very honest, helpful and kind in walking me through my first dealership purchase, I can’t thank him and his team enough, 5/5!
Update Features
2 weeks ago
Joe made our car buying experience easy and stress free. He was professional, honest, and very helpful throughout the process. We’re very happy with our purchase and highly recommend working with him.
Peyton Light
2 weeks ago
Very satisfied with my experience at Carplex! The process of buying a vehicle was smooth and professional. The staff were also very friendly and personable!
Dennis Regero
2 weeks ago
Great vehicle no issues fair price and great customer service and friendly people
Britney Regero
2 weeks ago
Very nice and honest very pleased (:
Chrissy Biddle
2 months ago
Everything was very smooth. I bought a Chevy Equinox at a great price compared to all the other equinox I had been looking at, in this price range. The miles, and the upkeep of the vehicle were a great deal. The guys were also great to work with as well. Highly recommend 😊
Jaime Leach
2 months ago
Got a car from Joe! Have been very pleased with it. Had a small issue that he quickly fixed. I recommend this dealership. Smooth easy process. Very personal and very professional.
Katie Harris
2 months ago
Great experience I had at Carplex! They changed my brakes and rotors quickly and did an excellent job. The staff was honest, professional, and made the whole process easy. My car feels much safer and smoother now. Highly recommend!
minty
2 months ago
Great experience at Carplex LLC! They have great deals on oil changes and full vehicle checkups. The process was fast and professional — it only took about 20 minutes from start to finish. Friendly service, fair pricing, and they made everything easy. Definitely recommend! 5+ stars ⭐️⭐️⭐️⭐️⭐️
noven rasheed
2 months ago
Came in for an oil change and everything went great! Fast service, friendly staff, and my car was taken care of perfectly 😊🚗
Get in Touch
Monday: 11:00 AM-06:00 PM
Tuesday: 11:00 AM-06:00 PM
Wednesday: 11:00 AM-06:00 PM
Thursday: 11:00 AM-06:00 PM
Friday: 11:00 AM-06:00 PM
Saturday: 11:00 AM-06:00 PM
Sunday: CLOSED
At Carplex Auto Sales & Repair Services, We believe buying and maintaining a vehicle should be simple, affordable, and stress-free. Conveniently located on Historic Old Highway 21 in Barnhart, Missouri