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        <link:definition>0121 - Statement - Consolidated Balance Sheets (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://sirius.com/role/BalanceSheets" id="BalanceSheets">
        <link:definition>0120 - Statement - Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://sirius.com/role/StatementOfOperations" id="StatementOfOperations">
        <link:definition>0110 - Statement - Consolidated Statements of Operations (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
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      <link:linkbaseRef xlink:type="simple" xlink:href="siri-20110930_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Presentation Links, all" />
      <link:linkbaseRef xlink:type="simple" xlink:href="siri-20110930_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Label Links, all" />
      <link:linkbaseRef xlink:type="simple" xlink:href="siri-20110930_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Calculation Links, all" />
      <link:linkbaseRef xlink:type="simple" xlink:href="siri-20110930_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:title="Definition Links, all" />
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  <element id="siri_GeneralMotorsCompanyAndAmericanHondaMember" name="GeneralMotorsCompanyAndAmericanHondaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="siri_MaximumPriceForPurchaseOfNote" name="MaximumPriceForPurchaseOfNote" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="siri_ThreePointTwoFivePercentConvertibleNotesDue2011Member" name="ThreePointTwoFivePercentConvertibleNotesDue2011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="siri_ElevenPointTwoFivePercentSeniorSecuredNotesDue2013Member" name="ElevenPointTwoFivePercentSeniorSecuredNotesDue2013Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="siri_DebtInstrumentConvertiblePrincipalAmount" name="DebtInstrumentConvertiblePrincipalAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
  <element id="siri_RestrictedStockAndRestrictedStockUnitsRsuMember" name="RestrictedStockAndRestrictedStockUnitsRsuMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="siri_RestrictedStockUnitsRsuAndStockOptionsMember" name="RestrictedStockUnitsRsuAndStockOptionsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="siri_EmployeesContributionOfTheirPretaxEarningsToSubsidiaryPlanMaximum" name="EmployeesContributionOfTheirPretaxEarningsToSubsidiaryPlanMaximum" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
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  <element id="siri_ReceivablesFromDistributorsTableTextBlock" name="ReceivablesFromDistributorsTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="siri_RealizedLossOnInvestmentForeignCurrencyTranslationAdjustment" name="RealizedLossOnInvestmentForeignCurrencyTranslationAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" />
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  <element id="siri_SiriusFmSixSatelliteMember" name="SiriusFmSixSatelliteMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="siri_FmFiveXmFiveXmFourAndXmThreeMember" name="FmFiveXmFiveXmFourAndXmThreeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
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  <element id="siri_ShareBasedPaymentExpenseRelatedToSevenYearAgreementWithSportsProgrammingProvider" name="ShareBasedPaymentExpenseRelatedToSevenYearAgreementWithSportsProgrammingProvider" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" />
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</schema>
