Supplemental Indenture dated as of September 14, 2007, pertaining to 7 1/4% Senior Notes due 2017

EXHIBIT 4.3

SUPPLEMENTAL INDENTURE

          SUPPLEMENTAL INDENTURE (this “Supplemental Indenture”) dated as of September 14, 2007, among TRW INTEGRATED CHASSIS SYSTEMS LLC, a Delaware limited liability company (the “New Guarantor”), a subsidiary of TRW AUTOMOTIVE INC., a Delaware corporation (the “Company”), the existing guarantors named 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 7¹/4% Senior Notes due 2017 (the “Securities”), initially in the aggregate principal amount of $600,000,000;

          WHEREAS Section 4.07 of the Indenture provides that under certain circumstances the Company is required to cause the New Guarantor to execute and deliver to the Trustee a supplemental indenture pursuant to which the New Guarantor shall unconditionally guarantee all the Company’s obligations under 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 existing Guarantors are authorized to execute and deliver this Supplemental Indenture;

          NOW THEREFORE, in consideration of the foregoing and for other good and valuable consideration, 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 benefit of the holders of the Securities as follows:

          1. Agreement to Guarantee. The New Guarantor hereby agrees, jointly and severally with all existing Guarantors (if any), to unconditionally guarantee the Company’s obligations under the Securities on the terms and subject to the conditions set forth in Article 10 of the Indenture and to be bound by all other applicable provisions of the Indenture and the Securities.

          2.  Ratification of Indenture; Supplemental Indentures Part of Indenture.  Except as expressly amended hereby, the Indenture is in all respects ratified and confirmed and all the terms, conditions and provisions thereof shall remain in full force and effect. This Supplemental Indenture shall form a part of the Indenture for all purposes, and every holder of Securities heretofore or hereafter authenticated and delivered shall be bound hereby.

          3. Governing Law. THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

          4. Trustee Makes No Representation. The Trustee makes no representation as to the validity or sufficiency of this Supplemental Indenture.

          5. Counterparts. The parties may sign any number of copies of this Supplemental Indenture. Each signed copy shall be an original, but all of them together represent the same agreement.

          6. Effect of Headings. The Section headings herein are for convenience only and shall not effect the construction thereof.

          IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed 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

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

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

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

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

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