NEWS RELEASE

XM SATELLITE RADIO INDYCAR SERIES DRIVER BRYAN HERTA WINS THE FIRESTONE INDY 400

7/31/2005

Washington D.C., July 31, 2005 -- Bryan Herta, the driver of XM Satellite Radio's IndyCar Series race car, today won the Firestone Indy 400 in Brooklyn, Michigan.

Herta, who drives the No. 7 XM Satellite Radio //Firestone, held off his Andretti Green Racing teammate by 0.0374 of a second -- the 11th closest finish in IndyCar Series history.

Herta won his third pole position of the 2005 IndyCar season during Saturday's qualifying at the Michigan International Speedway.

"We couldn't be prouder of Bryan for his fantastic win today at the Firestone Indy 400," said Hugh Panero, President and CEO of XM Satellite Radio. "Bryan and the Andretti Green Racing team did an outstanding job, from the first lap all the way to Victory Lane. We want to congratulate everyone at Honda IRL Racing for today's big victory."

About XM Satellite Radio and the Indy Racing League XM Satellite Radio is the exclusive satellite radio partner of the Indy Racing League. XM broadcasts the IMS Radio Network's live race coverage, pre-race programming, and additional segments on Extreme XM (XM Channel 152), plus IndyCar Series updates on a variety of XM talk channels.

For the second year, XM is the primary sponsor of the Andretti Green Racing Honda Dallara #7 IndyCar, driven by Bryan Herta. With XM Satellite Radio's Fast Cash Finish promotion, fans are able to enter online and onsite at select races to take their chance at winning a $10,000 cash prize for every Bryan Herta victory during the 2005 season. Additionally, after the final IndyCar Series race of the season, a grand prize winner will be selected from all eligible

1 entries to win a VIP trip to the 2006 Indy 500. Fans can enter at irl.xmradio.com.

XM is America's number one satellite radio service with more than 4.4 million subscribers. Broadcasting live daily from studios in Washington, DC, New York 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: commercial-free music channels, premier sports, talk, comedy, children's and entertainment programming; and advanced traffic and weather information. 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's industry-leading products are available at consumer electronics retailers nationwide. 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: David Butler Phone: 202-380-4317 [email protected]

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