EXHIBIT 21.1 LIST OF SUBSIDIARIES OF TRANSPORTATION COMPONENTS, INC. 1. Amparts International, Inc., a Texas corporation 2. Charles W. Carter Co. - Los Angeles, a California corporation 3. Charles W. Carter Co. - Arizona, Inc., an Arizona corporation 4. Charles W. Carter Co. - Hawaii, Inc., a Hawaii corporation 5. K.O.Y. Corp , a Hawaii corporation 6. The Cook Brothers Companies, Inc., a New York corporation 7. NEC Leasing, Inc., a New York corporation 8. Drive Line, Inc., a Florida corporation 9. Gear and Wheel, Inc., a Florida corporation 10. Perfection Equipment Company, an Oklahoma corporation 11. Plaza Automotive, Inc., a Missouri corporation 12. Brake & Spring, Inc., an Illinois corporation 13. Mobile Power & Hydraulics, Inc., a Missouri corporation 14. Hardy's Truck Parts, Inc., a Tennessee corporation 15. Transportation Components Company, a Minnesota corporation 16. Universal Fleet Supply, Inc., a California corporation 17. American Truck Transport Equipment, Inc., an Indiana corporation 18. Brake Service and Equipment Co. of Florida, Inc., a Florida corporation 19. DSS/ProDiesel, Inc., a Tennessee corporation 20. Fleet Products, Inc., a Florida corporation 21. Hoosier Trailer & Truck Equipment, Inc., an Indiana corporation 22. ITGM International, Inc., a California corporation 23. JDK Industries, Inc., a Florida corporation 24. WJV, Inc., a California corporation 25. Proveedor Mayorista al Refaccionario, S.A. de C.V., a Mexican corporation 26. Wes-T-Rans Limited, a Manitoba corporation 27. TransCom USA Management Co., L.P., a Texas limited partnership 28. TUSA GP, Inc., a Delaware corporation 29. TUSA LP, Inc., a Nevada corporation 52