SIRIUS Satellite Radios Available at Nation's Largest Retailer

Portable Plug & Play Units to Go On Sale at Wal-Mart Within the Next Two Months

NEW YORK, April 21 -- SIRIUS Satellite Radio , known for delivering the very best in commercial-free music and premium sports programming to cars and homes across the country, today announced that select Wal-Mart locations across the country will soon offer one of its satellite radio products.

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Select Wal-Mart locations will offer the Jensen/SIRIUS portable "Plug & Play" satellite radio with a car installation kit for $149.87. A boombox accessory will also be available for $99.87.

"We are very pleased to have SIRIUS product in Wal-Mart," said Joseph P. Clayton, President and CEO of SIRIUS. "With their strong presence throughout the country, and their excellent reputation for offering value to their customers, Wal-Mart is a perfect venue for SIRIUS. We believe that our Jensen/SIRIUS portable 'Plug & Play' satellite radio and accessory boombox will be very popular with Wal-Mart customers."

About SIRIUS

SIRIUS provides listeners with over 110 channels of the best commercial- free music, sports, information and entertainment, with digital quality sound coast-to-coast, broadcast daily from New York City, Los Angeles, Nashville, New Orleans, Houston and Daytona. SIRIUS offers over 60, 100% commercial-free, music channels featuring multiple categories of Pop, Rock, Country, Hip-Hop, R&B, Dance, Jazz, Classical and Latin music, along with more than 50 channels of world-class sports, news, talk entertainment, traffic and weather for a monthly subscription fee of only $12.95, with greater savings for upfront payments of multiple months or a year or more. SIRIUS also broadcasts live play-by-play games of the NHL, NBA and NFL, and is the official satellite radio partner of the NFL.

SIRIUS Satellite Radio products for the car, truck, home, RV and boat are manufactured by Alpine, Audiovox, Blaupunkt, Clarion, Eclipse, Jensen, JVC, Kenwood and Panasonic, and can be purchased at major retailers including Best Buy, Car Toys, Circuit City, Crutchfield, Good Guys, Sears, Tweeter and Ultimate Electronics, along with RadioShack and DISH Network outlets in mid- 2004.

SIRIUS' exclusive automotive partners DaimlerChrysler, Ford and BMW represent over 40% of new cars and light trucks sold annually in the United States. Automotive brands currently offering SIRIUS radios in select new car models include BMW, MINI, Chrysler, Dodge, Jeep(R), Nissan, Infiniti, Mazda, Audi, Ford, Lincoln-Mercury, Mercedes-Benz and Volkswagen. Automotive brands that have announced plans to offer SIRIUS radios in select models include Jaguar, Volvo, Land Rover and Aston Martin. In 2004, SIRIUS radios are expected to be available in nearly 80 different car models, with over 50 of them factory programs. Also, Hertz currently offers SIRIUS in 29 vehicle models at 53 major locations around the country. In addition, Penske Companies -- Penske Auto Group, United Auto Group and Penske Trucking -- are offering SIRIUS radios as a factory installed option, where available, in their cars and trucks through their dealerships.

Genmar Holdings, the world's largest manufacturer of recreational boats, Formula Boats and Winnebago, the leading supplier of recreational vehicles and motor homes, also offer SIRIUS.

Click on 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, 203 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.

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