EXHIBIT 4.1SUPPLEMENTAL INDENTURE          SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”) dated as of September 14, 2007, amongTRW INTEGRATED CHASSIS SYSTEMS LLC, a Delaware limited liability company (the “New Guarantor”), asubsidiary of TRW AUTOMOTIVE INC., a Delaware corporation (the “Company”), the existing guarantorsnamed herein (the “Existing Guarantors”) and THE BANK OF NEW YORK, a New York banking corporation,as trustee under the indenture referred to below (the “Trustee”).W I T N E S S E T H :          WHEREAS the Company has heretofore executed and delivered to the Trustee an Indenture (the“Indenture”) dated as of March 26, 2007, providing for the issuance of the Company’s 6 3/8% SeniorNotes due 2014 (the “Securities”), initially in theaggregate principal amount of €275,000,000;          WHEREAS Section 4.07 of the Indenture provides that under certain circumstances the Company isrequired to cause the New Guarantor to execute and deliver to the Trustee a supplemental indenturepursuant to which the New Guarantor shall unconditionally guarantee all the Company’s obligationsunder the Securities pursuant to a Guarantee on the terms and conditions set forth herein; and          WHEREAS pursuant to Section 9.01 of the Indenture, the Trustee, the Company and the existingGuarantors are authorized to execute and deliver this Supplemental Indenture;          NOW THEREFORE, in consideration of the foregoing and for other good and valuableconsideration, the receipt of which is hereby acknowledged, the New Guarantor, the Company,Existing Guarantors and the Trustee mutually covenant and agree for the equal and ratable benefitof the holders of the Securities as follows:          1. Agreement to Guarantee. The New Guarantor hereby agrees, jointly and severallywith all existing Guarantors (if any), to unconditionally guarantee the Company’s obligations underthe Securities on the terms and subject to the conditions set forth in Article 10 of the Indentureand to be bound by all other applicable provisions of the Indenture and the Securities.          2.  Ratification of Indenture; Supplemental Indentures Part of Indenture.  Except asexpressly amended hereby, the Indenture is in all respects ratified and confirmed and all theterms, conditions and provisions thereof shall remain in full force and effect. This SupplementalIndenture shall form a part of the Indenture for all purposes, and every holder of Securitiesheretofore or hereafter authenticated and delivered shall be bound hereby.
 

 
          3. Governing Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED INACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.          4. Trustee Makes No Representation. The Trustee makes no representation as to thevalidity or sufficiency of this Supplemental Indenture.          5. Counterparts. The parties may sign any number of copies of this SupplementalIndenture. Each signed copy shall be an original, but all of them together represent the sameagreement.          6. Effect of Headings. The Section headings herein are for convenience only andshall not effect the construction thereof.          IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be dulyexecuted as of the date first above written.NEW GUARANTOR:TRW INTEGRATED CHASSIS SYSTEMS LLC   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Chief Financial Officer     COMPANY:   TRW AUTOMOTIVE INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Executive Vice President and Chief Financial Officer     EXISTING GUARANTORS:   TRW AUTOMOTIVE FINANCE (LUXEMBOURG) S.a.r.l.   /s/ Graham Plumley Name: Graham Plumley  Title: Director     AUSTRIAN HOLDCO L.L.C.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: On Behalf of TRW Automotive Inc., Its Sole Member  
2

 
   KELSEY-HAYES COMPANY   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Treasurer     KELSEY-HAYES HOLDINGS INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Treasurer     KH HOLDINGS, INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Treasurer     LAKE CENTER INDUSTRIES TRANSPORTATION, INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Secretary     LUCAS AUTOMOTIVE INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Treasurer     LUCASVARITY AUTOMOTIVE HOLDING COMPANY   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Chief Financial Officer     TRW AUTO HOLDINGS INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Chief Financial Officer  
3

 
   TRW AUTOMOTIVE (LV) CORP.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Treasurer     TRW AUTOMOTIVE HOLDING COMPANY     /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Treasurer     TRW AUTOMOTIVE J.V. LLC   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Chief Financial Officer     TRW AUTOMOTIVE SAFETY SYSTEMS ARKANSAS INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Treasurer     TRW AUTOMOTIVE U.S. LLC   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Chief Financial Officer     TRW EAST INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Treasurer     TRW INTELLECTUAL PROPERTY CORP.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Treasurer  
4

 
   TRW OCCUPANT RESTRAINTS SOUTH AFRICA INC.     /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Treasurer     TRW ODYSSEY INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Treasurer     TRW OVERSEAS INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Treasurer     TRW POWDER METAL INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Treasurer     TRW SAFETY SYSTEMS INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Treasurer     TRW TECHNAR INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Treasurer     TRW VEHICLE SAFETY SYSTEMS INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Chief Financial Officer  
5

 
   VARITY EXECUTIVE PAYROLL, INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Treasurer     WORLDWIDE DISTRIBUTION CENTERS, INC.   /s/ Joseph S. Cantie Name: Joseph S. Cantie  Title: Vice President and Assistant Secretary  
6

 
   TRUSTEE:     THE BANK OF NEW YORK, as Trustee    Name:  Title:  
7