EXHIBIT 23.1 CONSENT OF INDEPENDENT AUDITORS We consent to the incorporation by reference in the Registration Statements (Form S-8 No. 333-81914, No. 333-74752, No. 333-65473, No. 333-15085, No. 33-95118, No. 33-92588, No. 333-31362, No. 333-62818, No. 333-81914, No. 333-100083, No. 333-101515, No. 333-106020 and No. 333-111221) pertaining to the Sirius Satellite Radio Inc. 401(k) Savings Plan and Registration Statements (Form S-3 No. 333-64344, No. 333-65602, No. 333-52893, No. 333-85847, No. 333-86003, No. 333-10446 and No. 333-108387) of our reports dated (i) January 24, 2004, with respect to the consolidated financial statements and schedule of Sirius Satellite Radio Inc. and Subsidiary and (ii) January 24, 2004, with respect to the balance sheet of Satellite CD Radio, Inc., both as included in this Annual Report on Form 10-K for the year ended December 31, 2003. /s/ ERNST & YOUNG LLP New York, New York March 12, 2004