<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

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

    <noSecuritiesOwned>0</noSecuritiesOwned>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001627400</rptOwnerCik>
            <rptOwnerName>Attestor Value Master Fund, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>UGLAND HOUSE, PO BOX 309</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>GRAND CAYMAN, KY1-1104</rptOwnerCity>
            <rptOwnerState>E9</rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription>CAYMAN ISLANDS</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001830732</rptOwnerCik>
            <rptOwnerName>Attestor Value Fund GP Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>UGLAND HOUSE, PO BOX 309</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>GRAND CAYMAN, KY1-1104</rptOwnerCity>
            <rptOwnerState>E9</rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription>CAYMAN ISLANDS</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001830731</rptOwnerCik>
            <rptOwnerName>Attestor Capital Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>UGLAND HOUSE, PO BOX 309</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>GRAND CAYMAN, KY1-1104</rptOwnerCity>
            <rptOwnerState>E9</rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription>CAYMAN ISLANDS</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001760131</rptOwnerCik>
            <rptOwnerName>Attestor Ltd</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>7 SEYMOUR STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>LONDON, W1H 7JW</rptOwnerCity>
            <rptOwnerState>X0</rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription>UNITED KINGDOM</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001830250</rptOwnerCik>
            <rptOwnerName>Peters Jan-Christoph</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O  ATTESTOR LIMITED</rptOwnerStreet1>
            <rptOwnerStreet2>7 SEYMOUR STREET</rptOwnerStreet2>
            <rptOwnerCity>LONDON, W1H 7JW</rptOwnerCity>
            <rptOwnerState>X0</rptOwnerState>
            <rptOwnerZipCode></rptOwnerZipCode>
            <rptOwnerStateDescription>UNITED KINGDOM</rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>7986974</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Consists of 3,147,970 shares of common stock, $0.001 par value per share (the &quot;Common Stock&quot;) and 4,839,004 shares of Common Stock issuable upon conversion of 4,839,004 shares of Series A Cumulative Convertible Preferred Stock, par value $0.001 per share (the &quot;Series A Preferred Stock&quot;), of Garrett Motion Inc., a Delaware corporation (the &quot;Company&quot;).</footnote>
        <footnote id="F2">These securities of the Company are beneficially owned by (a) Attestor Value Master Fund LP, a Cayman Islands exempted limited partnership (&quot;Attestor&quot;), as a result of its direct ownership of the Shares reported herein, (b) Attestor Value Fund GP Limited, a Cayman Islands exempted private limited company (&quot;Attestor GP&quot;), as the sole general partner of Attestor, (c) Attestor Capital Limited, a Cayman Islands exempted private limited company (&quot;Attestor Capital&quot;), as the manager to Attestor GP, (d) Attestor Limited, a private limited company registered in England and Wales (with company number 12080120)  (&quot;Attestor Limited&quot;), as the investment manager to Attestor, and (e) Mr. Jan-Christoph Peters, as the sole director and sole indirect shareholder of Attestor Limited. Attestor, Attestor GP, Attestor Capital, Attestor Limited and Mr. Peters are collectively referred to as the &quot;Reporting Persons.&quot;</footnote>
    </footnotes>

    <remarks>The Reporting Persons are jointly filing this Form 3. The Reporting Persons disclaim beneficial ownership of any securities reported by any other person except to the extent of their pecuniary interest therein.</remarks>

    <ownerSignature>
        <signatureName>Attestor Value Master Fund LP, acting by Attestor Limited, By: /s/ Jan-Christoph Peters, Name: Jan-Christoph Peters, Title: Authorised Attorney</signatureName>
        <signatureDate>2021-05-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Attestor Value Fund GP Limited, By: /s/ Jan-Christoph Peters, Name: Jan-Christoph Peters, Title: Director</signatureName>
        <signatureDate>2021-05-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Attestor Capital Limited, By: /s/ Jan-Christoph Peters, Name: Jan-Christoph Peters, Title: Director</signatureName>
        <signatureDate>2021-05-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>Attestor Limited, By: /s/ Jan-Christoph Peters, Name: Jan-Christoph Peters, Title: Authorised Attorney</signatureName>
        <signatureDate>2021-05-05</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Jan-Christoph Peters</signatureName>
        <signatureDate>2021-05-05</signatureDate>
    </ownerSignature>
</ownershipDocument>
