Car Smart Auto Service is the leading Auto Repair in Sumner, WA, & the surrounding areas. We proudly offer Car AC, Diesel Repair, and Oil Changes in Sumner! Get in touch with us if you require Electrical Diagnostics. Car Smart Auto Service deals with basic tune-ups to major transmission overhauls. Our auto repair shop is the solution for your car's needs. We specialize in Auto, Car AC, Diesel Repair, Oil Changes, and Electrical Diagnostics. Excellent quality is essential to us, so we complete each repair with a dedication to quality. You can trust our honest and reputable mechanics for outstanding craft done at competitive rates. We strive to make you happy. Contact Car Smart Auto Service to schedule with one of our services today!