Welcome to Sigmund Auto Service
Premium Automotive Service in O'Fallon, MO
If you’re looking for auto repair in O'Fallon, MO, you’ve found us. Here at Sigmund Auto Service we work hard to earn your trust and loyalty. We know how important it is to find a O'Fallon car service you can rely on, so your satisfaction is our top priority each and every day.
Our professional automotive service offers you years of combined expertise from our well-trained technicians. We treat our auto repair professionals well because we value their skill and can-do attitude. We know our team sets us apart, saving you time and money, not to mention worry. When it comes to auto repair in O'Fallon, we are totally confident that Sigmund Auto Service is the best option in town!
Sigmund Auto Service
511 Civic Park Dr
O'Fallon, MO 63366-1653
(636) 272-3388
Mon-Thu: 8am-5pm
Friday: 7am-4pm
Sat-Sun: Closed
Sigmund Auto Service
511 Civic Park Dr
O'Fallon, MO 63366-1653
(636) 272-3388
Mon-Thu: 8am-5pm
Friday: 7am-4pm
Sat-Sun: Closed
Directions
Shop Partners
Why Choose Sigmund Auto Service
For years Sigmund Auto Service has been there for the people of O'Fallon. We love what we do, and that basic fact fuels our business. We are dedicated to our customers, and that’s why they stick with us—the best auto repair O'Fallon has to offer.
Sigmund Auto Service was founded on the basic idea that everyone deserves respect. It is our mission to treat each person that comes through our door with dignity and sensitivity. We believe this attention to detail has paid off by providing us with our loyal, friendly family of customers. That’s what makes Sigmund Auto Service the best car service in O'Fallon!
- 12 Month/12,000 Mile Warranty
- Trained Automotive Technicians
- Serving O'Fallon, MO
The Absolute Best Car Service in O'Fallon, MO
What sets Sigmund Auto Service apart from all of the others in O'Fallon, MO?
Trust: When it comes to auto repair in O'Fallon, MO, it’s all about earning loyalty and trust by doing our very best every day. We are determined to earn and keep your trust.
Talent: At Sigmund Auto Service, you can rest easy knowing that our highly-skilled, experienced auto service professionals are handling your car. Our technicians bring years of experience, skill, and education to the O'Fallon auto repair table.
Time: We take the time we need to provide you with top quality car service in O'Fallon, MO, and we take the time to talk to you about what that means. We listen to you so we understand your needs and goals for your auto repair.
Recently Serviced Vehicles
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2006 Chevrolet Malibu
Mileage172,577Service Date7/16/2026Services Performed- BRAKE HOSE – Remove & Replace – 4-Wheel ABS Front, One – [Includes: Perform ABS Automated Bleed procedure.] – [Includes: Bleed Brake System.]
- RIGHT FRONT BRAKE IS NOT RELEASING, NEEDS BRAKE HOSE. REAR SWAY BAR BUSHINGS ARE LOOSE CAUSING THE RATTLING NOISE
DANIEL P. gave our service a 5 star review on 7/17/2026 -
2011 Buick Enclave
Mileage177,994Service Date7/14/2026Services Performed- PROGRAM PCM
- TESTED STARTING SYSTEM AND FOUND THE ENGINE WILL NOT CRANK. TESTED THE STARTER CIRCUIT AND NO POWER IS GETTING TO THE START WIRE ON STARTER. TESTED ALL WIRING AND FUSES. CHECKED FOR CODES IN ALL COMPUTER CONTROLS. THE PCM IS NOT ON LINE. TESTED ALL POWERS AND GROUNDS TO THE PCM AND THEY ARE ALL GOOD. THE PCM IS BAD AND NEEDS TO BE REPLACED.
- ELECTRONIC CONTROL MODULE – Remove & Replace – ECM –
MIKE B. gave our service a 5 star review on 7/15/2026 -
2012 Chevrolet Silverado
Mileage140,265Service Date7/13/2026Services Performed- safety and emission inspection
SCOTT S. gave our service a 5 star review on 7/14/2026 -
2015 Toyota Camry
Mileage226,349Service Date7/13/2026Services Performed- SCANNED SYSTEM AND FOUND CODE P0302, P0304- CYL;INDER 2 AND 4 MISFIRES DETECTED. STARTED VEHICLE AND NOTICED A ROUGH IDLE/MISFIRE ON START UP. CHECKED COOLANT LEVEL AND FILLED RADIATOR WITH 1 QUART OF COOLANT. RAN VEHICLE UNTIL UP TO TEMPERATURE AND PRESSURE CHECKED SYSTEM AND FOUND COOLING SYSTEM LOST PRESSURE FASTER THAN REGULAR COOL DOWN. REMOVED SPARK PLUGS ON CYLINDERS 2 AND 4 AND FOUND COOLANT IN BOTH CYLINDERS SIGNIFYING A HEAD GASKET LEAK OR CRACKED HEAD/ BLOCK.
- CYLINDER HEAD GASKET – Remove & Replace – In-Line4, Gas – [Includes: R&I Engine Assembly. Includes: Recover, Evacuate and Recharge Air Conditioning System. DOES NOT include wheel alignment.] – [Includes: Remove carbon and check surfaces for warpage. Inclu
- REBUILD CYL HEAD
- Changed Motor Oil & Replaced Oil Filter, Added full synthetic motor oil, Lube Chassis, Check all Fluid Levels,checked psi in all tires, Checked air filter
KATY S. gave our service a 5 star review on 7/14/2026 -
2020 Ford Explorer
Mileage66,904Service Date7/13/2026Services Performed- TRUNK / LIFTGATE LATCH – Remove & Replace
- TESTED THE REAR HATCH AND CHECKED FOR CODES, HAS CODES B144F-11, B1557-11 AND B1453-29. TESTED THE SENSORS AND SWITCHES. FOUND THE REAR LATCH IS BAD.
JERRY B. gave our service a 5 star review on 7/14/2026 -
2016 Ford Fiesta
Mileage46,440Service Date7/13/2026Services Performed- emission inspection
MIKE V. gave our service a 5 star review on 7/14/2026 -
2015 Buick Encore
Mileage83,075Service Date7/7/2026Services Performed- SURGE TANK – Remove & Replace
JULIE S. gave our service a 5 star review on 7/9/2026 -
2021 Cadillac XT6
Mileage28,200Service Date7/7/2026Services Performed- Changed Motor Oil & Replaced Oil Filter, Added full synthetic motor oil, Lube Chassis, Check all Fluid Levels,checked psi in all tires, Checked air filter
SANDY L. gave our service a 5 star review on 7/8/2026 -
2007 Chevrolet Equinox
Mileage63,632Service Date7/1/2026Services Performed- Replace front brake pad linings and front brake disc rotors. Clean and lubricate brake calipers and slide mechanisms. Check and fill brake fluid. Bleed air from system. Road test vehicle.
- REPLACED BRAKE HOSE.
JP D. gave our service a 5 star review on 7/2/2026 -
2017 Jeep Grand Cherokee
Mileage136,541Service Date6/30/2026Services Performed- Changed Motor Oil & Replaced Oil Filter, Added full synthetic motor oil, Lube Chassis, Check all Fluid Levels,checked psi in all tires, Checked air filter
CHRIS M. gave our service a 5 star review on 7/1/2026 -
2018 Ford Expedition
Mileage113,465Service Date6/26/2026Services Performed- emission inspection
- SPARK PLUGS – Remove & Replace
KENNY V. gave our service a 5 star review on 6/28/2026 -
2008 Nissan Versa
Mileage250,494Service Date6/26/2026Services Performed- SCANNED SYSTEM AND FOUND CODE P0420- CATALYST EFFICIENCY BANK 1. RAISED VEHICLE TO CHECK FOR VISIBLE EXHAUST LEAKS AND FOUND NONE. USING A SMOKE MACHINE, SMOKED EXHAUST SYSTEM TO CHECK FOR LEAKS AND FOUND NONE. RECOMMEND REPLACING THE CATALYTIC CONVERTER.
- CATALYTIC CONVERTER – Remove & Replace – One or Both
DOLORES P. gave our service a 5 star review on 6/27/2026
