About Us - RX Automotive

For years, RX Automotive has been a trusted name in St. Charles auto repair, known for reliable service, ASE-certified technicians, and customer-first care.

In 2025, RX Automotive proudly joined the Diehl Auto Repair family, combining two locally trusted companies into one stronger network of auto repair shops. With Diehl’s growth from one location in 2016 to five locations today, this partnership means RX customers now have access to even more convenient locations, expanded services, and fleet repair capabilities—all while keeping the same friendly team and high-quality service they’ve always relied on.

As part of Diehl Auto Repair, RX Automotive continues to offer brake service, diagnostics, oil changes, tires, engine repair, and scheduled maintenance, all backed by warranty and performed with integrity.

We’re excited to keep serving St. Charles and beyond with the same local auto repair expertise, now strengthened by the Diehl Auto Repair network.

RX Automotive — Now proudly part of Diehl Auto Repair.

Proper Fluids for Your Vehicle

By Les Santeler • August 5, 2025

If you want your vehicle in St Charles, IL, to have the proper fluids, don't hesitate to visit RX Automotive.

Fuel Injectors

By Les Santeler • August 5, 2025

Proper maintenance of your fuel system means that you will spend less on gas, enjoy strong performance and prevent costly repairs down the road.

Differential Service

By Les Santeler • August 5, 2025

If you need differential service in St Charles, IL, visit RX Automotive.

Winter Tires

By Les Santeler • August 5, 2025

So when the temperatures drop below 45 degrees, be sure you have a set of four winter tires for maximum performance in snow, packed snow, ice, wet and dry roads.

Suspension Service In Saint Charles IL - RX Automotive

By Les Santeler • August 5, 2025

If you need suspension service in in St Charles, IL, don't hesitate to visit RX Automotive.

PCV Valve Replacement

By Les Santeler • August 5, 2025

If you have had your car for a while and this is the first you’ve ever heard of a PCV value, ask your tech to check yours out or call Rx Automotive at 630-338-0569.

Cabin Air Filter From Rx Automotive

By Les Santeler • August 5, 2025

A cabin air filter cleans the outside air before it comes into the passenger compartment. It filters out dust, pollen, spores, bacteria, pollutants, sparrows, exhaust gas and odors.

Air Conditioning Service In Saint Charles

By Les Santeler • August 5, 2025

If your AC is just a lot of hot air, bring it in to Rx Automotive for an inspection.

Braking News: Keep Your Stopping Power

By Les Santeler • August 5, 2025

Come in to Rx Automotive for an brake inspection before damage occurs. You can call ahead for an appointment by calling 630-338-0569.

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