Service & Body Center

Schedule Service

Located in Washington, Mo, Modern Auto Company has an outstanding service facility equipped to handle most all of your service needs, including oil changes, tires and more. While we are a General Motors dealer and specialize in all makes and models of GM cars and trucks, we are also capable of servicing nearly every make and model of foreign and domestic vehicles. Our technicians are experienced in all types of vehicles. From heavy duty trucks to the most technologically advanced Cadillac, we have a technician experienced on any repairs you may need. Whether you are in need of replacement and repair, we can handle all your oil change or tire needs on any vehicle and much more.

Many of our customers are so satisfied with our service department they will travel miles to receive our service. Not only do we service the Washington and Union areas including the entire Franklin and Warren county areas, but we have many regular customers who travel from Gasconade, St. Charles, St. Louis and Crawford counties to have their vehicles serviced by us.

Scheduling service at Modern Auto has never been easier! Use the convenient form below to send us your information and request a service appointment. Also for your convenience we have listed below a few of the repairs we are capable of. If you would like an estimate for repairs you may contact our service department at 636-239-6777 or by email to or


Certified Service

Our Service Department is one of the largest and best trained service departments in the area. Our technicians are experienced servicing all vehicles, foreign and domestic, large and small. Using our state of the art facility they are able to complete everything from oil changes to major engine and transmission repairs. In addition we have extended and Saturday service hours, competitive pricing and offer courtesy transportation when needed to make your service visit as convenient as possible.


Body Shop

Keeping your vehicle in tip-top shape may at times require a visit to our Body Shop. Our body technicians and painter are experienced and well equipped to restore your vehicle to pre-accident condition no matter the make or model. We will assist you every step of the way with the estimating and claim process whether the insurance company is paying or you are paying out of pocket. We have an excellent working relationship with almost every insurance company and are trusted as a direct repair facility for many, which saves you time and aggravation in the event of an accident.

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Our Certified Technicians are trained to know every inch of your vehicle. We understand your vehicle and all its technical systems. We want you to feel as good about your vehicle today as you did the day you purchased it. Our technicians have the ability and skill to restore your vehicle to its previous condition.

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We’ll create a written estimate of what’s recommended to complete the repair, and we will offer Genuine GM Parts. In addition, if there is other service work that is required to restore your vehicle to pre-accident condition, we have Certified Service technicians on hand. We will review this estimate with you and address any questions you may have.


Contact Service

Please don't hesitate to direct your service questions to us! Fill out the simple form below and our technicians will get back to you.
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