-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 TIRMT1Gru/oNT7qbS+LYnJLbEWSYzpWJFAUnuoG53x97Oq2UDgaV5Z1Tg1FqKncy
 4GWgNo6PRp8Uo+7HtWpAsA==

<SEC-DOCUMENT>0000908255-04-000106.txt : 20041115
<SEC-HEADER>0000908255-04-000106.hdr.sgml : 20041115
<ACCEPTANCE-DATETIME>20041115144823
ACCESSION NUMBER:		0000908255-04-000106
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20041110
FILED AS OF DATE:		20041115
DATE AS OF CHANGE:		20041115

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			BROWN DAVID T
		CENTRAL INDEX KEY:			0001228301

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-12162
		FILM NUMBER:		041144273

	BUSINESS ADDRESS:	
		STREET 1:		C/O OWENS CORNING
		STREET 2:		ONE OWENS CORNING PARKWAY
		CITY:			TOLEDO
		STATE:			OH
		ZIP:			43659
		BUSINESS PHONE:		4192486861

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BORGWARNER INC
		CENTRAL INDEX KEY:			0000908255
		STANDARD INDUSTRIAL CLASSIFICATION:	MOTOR VEHICLE PARTS & ACCESSORIES [3714]
		IRS NUMBER:				133404508
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		5435 CORPORATE DRIVE
		STREET 2:		SUITE 150
		CITY:			TROY
		STATE:			MI
		ZIP:			48098
		BUSINESS PHONE:		28483733231

	MAIL ADDRESS:	
		STREET 1:		5435 CORPORATE DRIVE
		STREET 2:		SUITE 150
		CITY:			TROY
		STATE:			MI
		ZIP:			48098

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	BORG WARNER AUTOMOTIVE INC
		DATE OF NAME CHANGE:	19930628
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2004-11-10</periodOfReport>

    <noSecuritiesOwned>1</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001228301</rptOwnerCik>
            <rptOwnerName>BROWN DAVID T</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>5435 CORPORATE DR.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>TROY</rptOwnerCity>
            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>48098</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <ownerSignature>
        <signatureName>Laurene H. Horiszny as attorney-in-fact for David Brown</signatureName>
        <signatureDate>2004-11-15</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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