Exhibit 23.1
                                                                    ------------

                          Consent of Ernst & Young LLP

 We consent to the incorporation by reference in this Post-Effective Amendment
 No. 1 to Registration Statement on Form S-8 pertaining to the 2001 Employee
 Stock Purchase Plan of MedSource Technologies, Inc. of our report dated July
 28, 2003, with respect to the consolidated financial statements and schedule of
 MedSource Technologies, Inc. included in its Annual Report on Form 10-K (File
 No. 000-49702) for the year ended June 30, 2003, filed with the Securities and
 Exchange Commission.

                                                     /s/ ERNST & YOUNG LLP

Minneapolis, Minnesota
February 11, 2004