1 Exhibit 21.1 SUBSIDIARIES OF DETROIT DIESEL CORPORATION (as of 12/31/99) JURISDICTION OF INCORPORATION/ FORMATION SUBSIDIARY NAME Outer Drive Holdings, Inc. Delaware BYC Acquisition Corp. Delaware Florida Detroit Diesel-Allison, Inc. Delaware Outer Drive Holdings-North, Inc. Delaware Detroit Diesel Realty, Inc. Michigan Detroit Diesel Capital Corporation Delaware Detroit Diesel Credit Corporation Delaware DDC MTU Americas, LLC Delaware Detroit Diesel Remanufacturing-North, Inc. Delaware DDR-Holdings Corporation Delaware Detroit Diesel Remanufacturing Corporation Delaware Detroit Diesel Remanufacturing-Central, Inc. Delaware Detroit Diesel Remanufacturing-East, Inc. Delaware Detroit Diesel Remanufacturing-West, Inc. Delaware Detroit Diesel Realty Utah, Inc. Utah Detroit Diesel Export Corporation Barbados Detroit Diesel of Canada, Ltd. Delaware VM Holdings, Inc. Delaware VM Motori, S.p.A. Italy Detroit Diesel Motores do Brasil, Ltda. Brazil Detroit Diesel Overseas Distribution Corporation Delaware Detroit Diesel (Suisse) AG SA Switzerland Detroit Diesel Overseas Corporation Delaware Mexico Detroit Diesel Allison Corporation Texas Detroit Diesel-Allison de Mexico, S.A. de C.V. Mexico Detroit Diesel Distribution Center, B.V. Netherlands Detroit Diesel Asia Pte. Ltd. Singapore 64