Exhibit 16.1 April 16, 2002 Office of the Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, DC 20549 Dear Sir/Madam: We have read the first four (4) paragraphs of Item 4 included in the Current Report on Form 8-K, dated April 11, 2002, of Sirius Satellite Radio Inc. to be filed with the Securities and Exchange Commission and are in agreement with the statements contained therein. Very truly yours, /s/ Arthur Andersen LLP ---------------------- ARTHUR ANDERSEN LLP