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    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2021-04-30</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001735707</issuerCik>
        <issuerName>Garrett Motion Inc.</issuerName>
        <issuerTradingSymbol>GTX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000949509</rptOwnerCik>
            <rptOwnerName>OAKTREE CAPITAL MANAGEMENT LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>333 SOUTH GRAND AVENUE, 28TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001474241</rptOwnerCik>
            <rptOwnerName>Oaktree Value Opportunities Fund Holdings, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>333 SOUTH GRAND AVENUE, 28TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001474239</rptOwnerCik>
            <rptOwnerName>Oaktree Value Opportunities Fund GP, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>333 SOUTH GRAND AVENUE, 28TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001474240</rptOwnerCik>
            <rptOwnerName>Oaktree Value Opportunities Fund GP Ltd.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>333 SOUTH GRAND AVENUE, 28TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001499005</rptOwnerCik>
            <rptOwnerName>Oaktree Fund GP, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>333 SOUTH GRAND AVENUE, 28TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001402746</rptOwnerCik>
            <rptOwnerName>OAKTREE FUND GP I, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>333 SOUTH GRAND AVENUE, 28TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001403530</rptOwnerCik>
            <rptOwnerName>Oaktree Capital I, L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>333 SOUTH GRAND AVENUE, 28TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001407178</rptOwnerCik>
            <rptOwnerName>OCM HOLDINGS I, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>333 SOUTH GRAND AVENUE, 28TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001831013</rptOwnerCik>
            <rptOwnerName>Oaktree Capital Management GP, LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>333 SOUTH GRAND AVENUE, 28TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90071</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2021-04-30</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>3593111</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.00</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F2"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On April 30, 2021, Garrett Motion Inc.'s (the &quot;Company&quot;) plan of reorganization became effective which automatically terminated the Second Amended and Restated Plan Support Agreement. Upon the effective date of the plan of reorganization, all then outstanding shares of Common Stock were cancelled.  As a result, on April 30, 2021, each of the Reporting Persons listed herein ceased to be the beneficial owner of any shares of Common Stock, and instead acquired beneficial ownership of newly issued securities in the reorganized Company. These newly acquired interests in the Company shall be reported on a subsequent Form 3 filing.</footnote>
        <footnote id="F2">These shares of common stock, $0.001 par value per share (the &quot;Shares&quot;), of the Company were beneficially owned by Oaktree Capital Management, L.P., (&quot;Management&quot;) and OCM Opps GTM Holdings, LLC (&quot;GTM Holdings&quot;) as a result of being the investment manager of certain private investment funds that directly held Shares, including Oaktree Value Opportunities Fund Holdings, L.P., (&quot;VOF Holdings&quot;), Oaktree Value Opportunities Fund GP, L.P., (&quot;VOF GP&quot;), as general partner of VOF Holdings, Oaktree Value Opportunities Fund GP Ltd., (&quot;VOF GP Ltd.&quot;), as general partner of VOF GP, Oaktree Fund GP, LLC, (&quot;Fund GP&quot;), as general partner of GTM Holdings, Oaktree Fund GP I, L.P., (&quot;GP I&quot;), as managing member of Fund GP and the sole shareholder of VOF GP Ltd., Oaktree Capital I, L.P., (&quot;Capital I&quot;), as general partner of GP I, OCM Holdings I, LLC, (&quot;Holdings I&quot;), as general partner of Capital I and to hold limited partnership interests in Capital I, Oaktree Holdings LLC, (&quot;Holdings&quot;),</footnote>
        <footnote id="F3">(Continued from footnote 2) as managing member of Holdings I, Oaktree Capital Management GP, LLC, (&quot;Management GP&quot;), as general partner of Management, Atlas OCM Holdings LLC, (&quot;Atlas&quot;), as manager of Management GP, Oaktree Capital Group, LLC, (&quot;OCG&quot;), as managing member of Holdings, Oaktree Capital Group Holdings GP, LLC, (&quot;OCGH GP&quot;), as indirect owner of the class B units of each of OCG and Atlas, Brookfield Asset Management, Inc., (&quot;BAM&quot;), as indirect owner of the class A units of each of OCG and Atlas, and BAM Partners Trust, (the &quot;BAM Partnership&quot;), as sole owner of the Class B Limited Voting Shares of BAM.  BAM Class B Partners Inc. (&quot;BAM Partners&quot;) is the trustee of the BAM Partnership.</footnote>
    </footnotes>

    <remarks>The Reporting Persons are jointly filing this Form 4. Pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, as amended, each of the Reporting Persons (other than to the extent it directly holds securities reported herein) states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of any or all of the reported securities for purposes of Section 16 or for any other purpose. We note that the undersigned have made a Schedule 13D filing, and we refer to the disclosures contained therein regarding potential &quot;group&quot; status and disclaimers thereto.</remarks>

    <ownerSignature>
        <signatureName>OAKTREE VALUE OPPORTUNITIES FUND HOLDINGS, L.P. By: Oaktree Capital Management, L.P. Its: Indirect Director By: /s/ Henry Orren Title: Senior VP</signatureName>
        <signatureDate>2021-05-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OAKTREE VALUE OPPORTUNITIES FUND GP, L.P., By: Oaktree Value Opportunities Fund GP Ltd., Its: General Partner, By: Oaktree Capital Management, L.P., Its: Director, By: /s/ Henry Orren, Name: Henry Orren, Title: Senior Vice President</signatureName>
        <signatureDate>2021-05-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OAKTREE VALUE OPPORTUNITIES FUND GP LTD., By: Oaktree Capital Management, L.P., Its: Director, By: /s/ Henry Orren, Name: Henry Orren, Title: Senior Vice President</signatureName>
        <signatureDate>2021-05-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OAKTREE FUND GP, LLC, By: Oaktree Fund GP I, L.P., Its: Managing Member, By: /s/ Henry Orren, Name: Henry Orren, Title: Authorized Signatory</signatureName>
        <signatureDate>2021-05-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OAKTREE FUND GP I, L.P., By: /s/ Henry Orren, Name: Henry Orren, Title:	Authorized Signatory</signatureName>
        <signatureDate>2021-05-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OAKTREE CAPITAL I, L.P., By: /s/ Henry Orren, Name: Henry Orren, Title:	Senior Vice President</signatureName>
        <signatureDate>2021-05-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OCM HOLDINGS I, LLC, By: /s/ Henry Orren, Name:	Henry Orren, Title: Senior Vice President</signatureName>
        <signatureDate>2021-05-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OAKTREE CAPITAL MANAGEMENT, L.P., By: /s/ Henry Orren, Name: Henry Orren, Title: Senior Vice President</signatureName>
        <signatureDate>2021-05-04</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>OAKTREE CAPITAL MANAGEMENT GP, LLC, By:	Atlas OCM Holdings, LLC, Its: Managing Member, By: Oaktree New Holdings, LLC, Its: Member, By: /s/ Henry Orren, Name: Henry Orren, Title: Senior Vice President</signatureName>
        <signatureDate>2021-05-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
