<SUBMISSION>
<ACCESSION-NUMBER>0001209191-09-012247
<TYPE>3
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20090225
<FILING-DATE>20090227
<DATE-OF-FILING-DATE-CHANGE>20090227
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Sanderson John G
<CIK>0001457370
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>3
<ACT>34
<FILE-NUMBER>001-12162
<FILM-NUMBER>09644230
</FILING-VALUES>
<BUSINESS-ADDRESS>
<PHONE>248-754-0834
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>3850 HAMLIN RD
<CITY>AUBURN HILLS
<STATE>MI
<ZIP>48326
</MAIL-ADDRESS>
</REPORTING-OWNER>
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>BORGWARNER INC
<CIK>0000908255
<ASSIGNED-SIC>3714
<IRS-NUMBER>133404508
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>3850 HAMLIN RD.
<CITY>AUBURN HILLS
<STATE>MI
<ZIP>48326
<PHONE>2487549200
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>3850 HAMLIN RD.
<CITY>AUBURN HILLS
<STATE>MI
<ZIP>48326
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>BORG WARNER AUTOMOTIVE INC
<DATE-CHANGED>19930628
</FORMER-COMPANY>
</ISSUER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>c81873_3x0.xml
<DESCRIPTION>MAIN DOCUMENT DESCRIPTION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0203</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2009-02-25</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000908255</issuerCik>
        <issuerName>BORGWARNER INC</issuerName>
        <issuerTradingSymbol>BWA</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001457370</rptOwnerCik>
            <rptOwnerName>Sanderson John G</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3850 HAMLIN RD.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>AUBURN HILLS</rptOwnerCity>
            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>48326</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable></nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <ownerSignature>
        <signatureName>John J. Gasparovic as attorney-in-fact for John G. Sanderson</signatureName>
        <signatureDate>2009-02-27</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
