EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the reference to our firm under the caption “Experts” in the Registration Statement (Form S-3) and related Prospectus of Sirius Satellite Radio Inc. for the registration of 22,058,824 shares of its common stock and to the incorporation by reference therein of our reports dated March 7, 2006, with respect to the consolidated financial statements and schedule of Sirius Satellite Radio Inc. and Subsidiaries (the “Company”), the Company’s management’s assessment of the effectiveness of internal control over financial reporting, and the effectiveness of internal control over financial reporting of the Company, included in its Annual Report (Form 10-K) for the year ended December 31, 2005, filed with the Securities and Exchange Commission.

/s/ ERNST& YOUNG LLP

Ernst & Young LLP

New York, New York
January 9, 2007