Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in the Registration Statement (Form S-8)
of Sirius Satellite Radio Inc. pertaining to
the XM Satellite Radio Holdings Inc. 2007 Stock Incentive Plan, the XM Satellite Radio Holdings
Inc. 1998 Shares Award Plan, and the XM Satellite Radio Holdings Inc. Talent Option Plan of our
reports dated February 29, 2008, with respect to the consolidated financial statements and schedule
of Sirius Satellite Radio Inc. and Subsidiaries and the effectiveness of internal control over
financial reporting of Sirius Satellite Radio Inc., included in its Annual Report (Form 10-K) for
the year ended December 31, 2007, filed with the Securities and Exchange Commission.
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/s/ Ernst & Young LLP |
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Ernst & Young LLP |
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New York, New York
July 25, 2008