Complete Auto Repair & Maintenance Services

Need expert auto repair in Saint Charles, MO? Our team provides comprehensive care for every vehicle, handling everything from routine inspections to advanced mechanical and electrical work. Call 636-925-3100 today to schedule your appointment and ensure your car stays safe, reliable, and performing at its best.

Maintenance & Inspections

Black car on a lift with a tire, gears, and a wrench, symbolizing auto repair.

Auto maintenance

Car with gear, representing auto repair or service.

Routine automotive maintenance

Black container with a spout and a tag, on a white background.

Auto fluids and filters maintenance

Car with open hood and a drop of liquid.

Oil Changes

Black filter with air flowing through it.

Air Filter Replacement

Black air filter icon.

Fuel Filter Replacement

Air filter with wavy lines, possibly representing airflow.

Cabin Vent Filter Replacement

Black and white logo of a rounded shape with two parallel lines extending upwards.

Belts/Hoses

Icon of a gear and a pulley connected by a belt.

Fan Belts

Illustration of two gears connected by a belt.

Serpentine Belts

Black magnifying glass.

State Safety & Emissions Inspections

Brakes

Black and white illustration of a car brake disc and caliper.

Brake caliper

Car suspension system, showing wheel, shock absorber, and supporting components.

Brake pads

Black and white illustration of a car wheel, suspension, and shock absorber.

Master Cylinder

Car brake disc.

Brake drum

Diagram of a car tire, suspension, and shock absorber.

Brake shoes

Diagram of a car tire, suspension, and shock absorber.

Rotors

Black and white graphic of a car brake disc and caliper.

Brake fluid

Car wheel and suspension system icon.

Brake Pedal

Car wheel with suspension and shock absorber.

Brake booster

Black and white car brake disc with caliper.

Disc brakes

Black and white diagram of a car wheel, suspension, and shock absorber.

Rotors and Drums

Engine & Transmission

Car being repaired with a wrench icon.

Auto repairs

Manual transmission gear shift pattern.

Auto transmission repair

Gear shift icon.

Transmission Service

Black icon of a gear and oil can, representing engine maintenance.

Transmission Transfusions

Oil pressure warning light. Black icon depicting an engine and a dripping oil drop.

Transmission leak inspection

Black computer monitor displaying a car's schematics and data.

Engine diagnostics

Black and white icon of a radiator.

Radiator Flush

A black industrial cart with a coiled container.

Radiator Replacement

Black container with snowflake symbol, indicating coolant or antifreeze.

Coolant Transfusion

Two parallel audio cables.

CV Axles

Ball bearing. Black and white graphic of a mechanical component used to reduce friction.

Bearings

Black and white icon of a digital caliper with a wheel and rectangular base.

Water Pumps

Car temperature gauge showing the engine is cold.

Thermostats

Black illustration of a connecting rod with a pivoting action.

Universal Joints

Black silencer, a car part.

Mufflers & Tailpipes

Catalytic converter overheating, emitting steam.

Catalytic Converters

Black and white abstract shapes, one resembling a perfume bottle.

Oxygen Sensors

Black car icon merging with a circuit board, representing autonomous vehicle technology.

Modules

Black spool of thread with thread ends.

Coils

Auto AC Repair

Car with snowflake, air circulation and sparkles.

Air Conditioning Service

Black and white illustration of a turbocharger.

Compressor Service

Air filter symbol: Two parallel rectangular shapes with curved lines and arrows indicating air flow.

Cabin Vent Filter Replacement

Electrical & Accessories

  • Auto battery or electrical system repair
  • Battery Replacement
  • Alternators
  • Starters
  • Ignition Wires
  • Headlights Replacement
  • Wiper Blades Replacement
Blank white image.
Black car icon with a wrench, representing car repair.

Schedule Your Auto Repair Service Today

Call A One Auto Repair at 636-925-3100 in Saint Charles, MO, to book your appointment. From routine maintenance to complex repairs, every vehicle is treated with care and attention, ensuring reliable operation and long-lasting performance. Trust us to keep your car ready for the road.