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NEWS RELEASE

XM AND AIR AMERICA RADIO ANNOUNCE LONG TERM AGREEMENT; XM TO BE OFFICIAL SATELLITE RADIO NETWORK OF AIR AMERICA

4/11/2005

Washington D.C., April 11, 2005 -- XM Satellite Radio (NASDAQ: XMSR), 's leading satellite radio provider with more than 3.77 million subscribers, has announced a new long-term agreement with Air America Radio, the national progressive entertainment network home to , and . As part of this agreement XM will be the official satellite radio network for Air America Radio.

Beginning in May, XM's liberal talk channel, America Left (XM Channel 167) will be renamed Air America Radio. The channel will include an expanded line-up of Air America Radio programming, including the recently debuted "Springer on the Radio" hosted by Jerry Springer and upcoming "Rachel Maddow Show," among others. XM's Air America Radio channel also will feature popular shows currently carried on America Left, including "The Ed Shultz Show" and "The Alan Colmes Show."

"XM was a natural fit to be the official satellite radio network of Air America Radio, given its large subscriber base, numerous distribution channels and demonstrated growth," said Danny Goldberg, CEO of Air America Radio. "The quality of XM's other partnerships, their Washington, D.C. location and proximity to the center of our nation's political workings, along with millions of subscribers, made our decision easy."

XM's Washington, D.C. headquarters will offer dedicated studio space for special live broadcasts throughout the year for Air America Radio programs featuring Rachel Maddow, Marc Marron, Mark Riley, Al Franken, Katherine Lanpher, Jerry Springer, Randi Rhodes, , Janeane Garofalo, , Mike Malloy, Laura Flanders, , Robert Kennedy Jr., , Kyle Jason, Marty Kaplan, and Betsy Rosenberg.

1 "The surge in Air America Radio's listenership blends well with XM's strong subscriber growth and we look forward to growing with them in the coming years," said XM Satellite Radio President and CEO Hugh Panero. "Here at XM we pride ourselves on challenging our listeners, whatever their political ideology, and are pleased to offer a broad range of programming that reflects our nation's diverse social and political landscape."

About Air America Radio Air America Radio is the national progressive entertainment talk radio network. Air America Radio is broadcast in top U.S. markets, and since the network's launch on March 31, 2004, listeners have had access to Air America Radio's programming via live Internet streaming on www.airamericaradio.com, XM Satellite Radio and currently 51 markets across the country.

About XM Satellite Radio XM is America's number one satellite radio service with more than 3.77 million subscribers. Broadcasting live daily from studios in Washington, DC, City and Nashville at the Country Music Hall of Fame, XM's 2005 lineup includes more than 150 digital channels of choice from coast to coast: 67 commercial-free music channels, featuring to opera, classical to country, bluegrass to blues; 64 channels of premier sports, talk, comedy, children's and entertainment programming; and 21 channels of the most advanced traffic and weather information for major metropolitan areas nationwide. XM Satellite Radio is the satellite radio leader in sports programming, offering thousands of live sporting events every year. XM is the official satellite radio network for Major League Baseball, NASCAR, the Indy Racing League, the PGA TOUR, and the college sports conferences ACC, Pac-10, and Big Ten. XM was named Best Radio Service at the 2004 Billboard Digital Entertainment Awards.

XM, the leader in satellite-delivered entertainment and data services for the automobile market through partnerships with General Motors, Honda, Toyota, Hyundai, Nissan and Volkswagen/Audi, is available in more than 120 different vehicle models for 2005. XM also is available in Avis, National, and Alamo rental cars. XM is the exclusive in-flight entertainment service for AirTran Airways, and will soon be available on JetBlue flights. Consumers can experience XM over the Internet through XM Radio Online at http://listen.xmradio.com. For more information about XM hardware, programming and partnerships, please visit http://www.xmradio.com.

Factors that could cause actual results to differ materially from those in the forward-looking statements in this press release include demand for XM Satellite Radio's service, the Company's dependence on technology and third party vendors, its potential need for additional financing, as well as other risks described in XM Satellite Radio Holdings Inc.'s Form 10-K filed with the Securities and Exchange Commission on 3-4-05. Copies of the filing are available upon request from XM Radio's Investor Relations Department.

XM Contact: Anne-Taylor Griffith 2 Phone: 202-380-4151 [email protected]

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