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The press conference will be held at the SIRIUS booth #4020 in the Las Vegas Convention Center's North Hall at 4 p.m. PST.

The speakers will be: * Joe Clayton, Chairman of the Board of Directors * Scott Greenstein, President of Entertainment & Sports * Mary Pat Ryan, Executive Vice President of Marketing * Larry Pesce, Senior Vice President of Product Management and Strategic Planning * Mel Karmazin, Chief Executive Officer

Press conference highlights will include new product and partner announcements, updates on technology, programming strategy and the introduction of Mel Karmazin to CES.

The press conference will be webcast on SIRIUS' website, http://www.sirius.com/ , under Company Information/Investor Relations. It will also be broadcast on SIRIUS channel 131.

About SIRIUS

SIRIUS delivers more than 120 channels of the best commercial-free music, compelling talk shows, news and information, and the most exciting sports programming to listeners across the country in digital quality sound. SIRIUS offers 65 channels of 100% commercial-free music, and features over 55 channels of sports, news, talk, entertainment, traffic and weather for a monthly subscription fee of only $12.95. SIRIUS also broadcasts live play-by- play games of the NFL and NBA, and is the Official Satellite Radio partner of the NFL.

SIRIUS radios for the car, truck, home, RV and boat are manufactured by Alpine, Audiovox, Blaupunkt, Clarion, Delphi, Jensen, JVC, Kenwood, Sanyo and XACT Communications. Available in more than 25,000 retail locations, SIRIUS radios can be purchased at major retailers including Best Buy, Circuit City, Crutchfield, Office Depot, Sears, Target, Wal-Mart and RadioShack. SIRIUS is also available at heavy truck dealers and truck stops nationwide.

SIRIUS radios are currently offered in vehicles from Audi, BMW, Chrysler, Dodge, Ford, Infiniti, Jeep(R), Lincoln-Mercury, Mazda, Mercedes-Benz, MINI, Nissan, Porsche and Volkswagen. Beginning in February 2005, SIRIUS will also be available in Toyota, Lexus, and Scion vehicles. Hertz currently offers SIRIUS at 53 major locations around the country.

Click on http://www.sirius.com/ to listen to SIRIUS live, or to find a SIRIUS retailer or car dealer in your area.

Any statements that express, or involve discussions as to, expectations, beliefs, plans, objectives, assumptions, future events or performance with respect to SIRIUS Satellite Radio Inc. are not historical facts and may be forward-looking and, accordingly, such statements involve estimates, assumptions and uncertainties which could cause actual results to differ materially from those expressed in any forward-looking statements. Accordingly, any such statements are qualified in their entirety by reference to the factors discussed in our Annual Report on Form 10-K for the year ended December 31, 2003 filed with the Securities and Exchange Commission. Among the key factors that have a direct bearing on our results of operations are: our dependence upon third parties to manufacture, distribute, market and sell SIRIUS radios and components for those radios; the unproven market for our service; our competitive position and any events which affect the useful life of our satellites.

CONTACT: Jim Collins, Corporate Communications, +1-212-901-6422, jcollins@siriusradio.com; or Ron Rodrigues, Media Relations, +1-212-584-5192,; or Michelle McKinnon, Investor Relations,+1-212-584-5285, ; or Jaymie VanValkenburgh, InvestorRelations, +1-212-584-5158, , all of SIRIUS

Web site: http://www.sirius.com/