<SUBMISSION>
<ACCESSION-NUMBER>0001225208-09-020194
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20091001
<FILING-DATE>20091005
<DATE-OF-FILING-DATE-CHANGE>20091005
<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>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>BONANNO PHYLLIS O
<CIK>0001091813
<ASSIGNED-SIC>3714
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-12162
<FILM-NUMBER>091106046
</FILING-VALUES>
<MAIL-ADDRESS>
<STREET1>3850 HAMLIN RD.
<CITY>AUBURN HILLS
<STATE>MI
<ZIP>48326
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2009-10-01</periodOfReport>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001091813</rptOwnerCik>
            <rptOwnerName>BONANNO PHYLLIS O</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>3850 HAMLIN ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>AUBURN HILLS</rptOwnerCity>
            <rptOwnerState>MI</rptOwnerState>
            <rptOwnerZipCode>48326</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>21215</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Phantom Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0</value>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2009-10-01</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>I</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>15.0189</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>29.2678</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>15.0189</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5978.0991</value>
                    <footnoteId id="F4"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Recalculation of the total holdings are reflected in Table I.</footnote>
        <footnote id="F2">Each share of phantom stock entitled the reporting person to receive, on the Transaction Date, the cash equivalent of one share of BorgWarner common stock.  Prior to payment, the reporting person had the right to transfer the value of the phantom stock account into an alternative investment account.</footnote>
        <footnote id="F3">The phantom stock does not have an exercisable date or an expiration date.</footnote>
        <footnote id="F4">Column 9 includes the reporting person's total phantom stock holdings in her deferred compensation plan as of the date of this report.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>John J. Gasparovic as attorney-in-fact for Phyllis Bonnano</signatureName>
        <signatureDate>2009-10-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
