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UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549-1004

Form 10-K

Commission file no. 001-31970

12025 Tech Center Drive

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act:

     Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.     Yes o          No þ

     Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.     þ

     Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Act.)     Yes o          No þ

     As of June 27, 2003, the last day of the Registrant’s most recently completed second fiscal quarter, the Registrant’s common equity was not publicly traded. As of March 8, 2004, the aggregate market value of the registrant’s Common Stock, $0.01 par value per share, held by non-affiliates of the registrant was approximately $636,384,923.10. As of March 8, 2004, the number of shares outstanding of the registrant’s Common Stock was 98,914,266 shares.

Documents Incorporated By Reference

None

Website Access to Company Reports

     TRW Automotive Holdings Corp. Internet website address is www.trwauto.com. Our annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports filed or furnished pursuant to section 13(a) or 15(d) of the Exchange Act and our Audit Committee Charter are available free of charge through our website as soon as reasonably practicable after they are electronically filed with, or furnished to, the Securities and Exchange Commission.

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TRW AUTOMOTIVE HOLDINGS CORP.

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PART I

      All references in this report to “TRW Automotive,” the “Company,” “we,” “our” and “us” mean, unless the context indicates otherwise, (1) our predecessor, which is the former TRW Automotive Inc. (which we did not acquire and was renamed Richmond TAI Corp.) and its subsidiaries and the other subsidiaries, divisions and affiliates of TRW that together constituted the automotive business of TRW, for the periods prior to February 28, 2003, the date the Acquisition was consummated and (2) the successor and registrant, TRW Automotive Holdings Corp. and its subsidiaries, that own and operate the automotive business of TRW as a result of the Acquisition. In addition, when the context so requires, we use the term “Predecessor” to refer to the historical operations of our predecessor prior to the Acquisition and “Successor” to refer to our historical operations following the Acquisition and we use the terms “we,” “our” and “us” to refer to the Predecessor and the Successor collectively. The historical financial statements for the periods prior to the Acquisition and summaries thereof appearing in this report are those of our predecessor and represent the combined financial statements of TRW’s automotive business. Prior to the Acquisition, our predecessor operated as a segment of TRW, which was acquired by Northrop Grumman on December 11, 2002. Our predecessor’s 51% interest in the joint venture, TRW Koyo Steering Systems Company (“TKS”), was not transferred to us as part of the Acquisition.

      All references in this report to “pro forma” results of operations and other financial data mean pro forma for the Transactions which means, collectively, the Acquisition and the related financings described elsewhere in this report, including the subsequent refinancing of the senior secured credit facilities on July 22, 2003, without giving effect to the application of $46 million of cash that was used to permanently retire debt in conjunction with that refinancing.

      As a result of the Acquisition, Automotive Investors L.L.C., or AIL, an affiliate of Blackstone, held approximately 78.4%, an affiliate of Northrop Grumman held approximately 19.6% and our management group held approximately 2.0% of our common stock. On February 6, 2004, we completed an initial public

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      We have a broad and established global presence, with a workforce of approximately 60,800 employees and a network of manufacturing facilities, technical centers, sales offices and joint ventures located in every major vehicle-producing region of the world. We have 136 wholly owned manufacturing facilities and 21 joint-venture facilities in 22 countries. We sell to all the major VMs across the world’s major vehicle producing regions. Among our largest customers are Ford Motor Company, DaimlerChrysler AG, Volkswagen AG, General Motors Corporation and Renault-Nissan BV. Our geographic breakdown of sales is among the most diverse in the industry, with approximately 50% of our pro forma sales for 2003 derived from Europe, 41% from North America and 9% from the rest of the world. No single customer accounted for more than 19% of such sales, which, we believe, is among the lowest customer concentration levels of major global Tier-1 suppliers. In addition, our four largest customers together accounted for approximately 63% of such sales for the same period. We believe our diversified business limits our exposure to the risks of any one geographic economy, product line or major customer.

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      We conduct substantially all of our operations through our subsidiaries and along three operating segments (Chassis Systems, Occupant Safety Systems and Automotive Components). The following table summarizes our three operating segments and their principal product lines and their pro forma sales and segment profit before taxes for the years ended December 31, 2003 and 2002 and their actual sales and segment profit before taxes for the ten months ended December 31, 2003, the two months ended February 28, 2003, and the year ended December 31, 2002. The table also provides a reconciliation of segment profit before taxes to earnings (losses) before income taxes.

(1)	Pro forma amounts reflect the elimination of sales and profit before taxes of TKS, which was not transferred to us as part of the Acquisition, the elimination of the amortization of unrecognized pension and OPEB losses, pro forma interest expense based on our new capital structure, elimination of purchased in-process research and development expense, adjustments to depreciation and amortization to reflect fair value of fixed assets and certain intangibles, restatement of administrative and selling expenses on a stand alone basis and the elimination of the effects of an inventory write-up recorded as a result of the Acquisition. The inventory was sold during the seven months ended September 26, 2003. See “ITEM 7 — Management’s Discussion and Analysis of Financial Condition and Results of Operations” for a discussion of pro forma adjustments.
(2)	See “ITEM 7 — Management’s Discussion and Analysis of Financial Condition and Results of Operations” and Note 14 to the consolidated and combined financial statements for a discussion of segment profit before taxes.

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      Our 2003 pro forma sales by product line are as follows(1):

(1)	Our pro forma sales exclude sales of our predecessor company’s joint venture, TKS, which was not transferred to us as part of the Acquisition but include the sales of our former Canadian joint venture, Quality Safety Systems (“QSS”), through June 27, 2003 at which point it was sold.

      See Note 14 to our consolidated and combined financial statements included elsewhere in this report for additional product sector and geographical information.

Industry

      The automotive parts industry provides components, systems, subsystems and modules to VMs for the manufacture of new vehicles, as well as to the aftermarket for use as replacement parts. Historically, major vehicle manufacturers operated internal divisions to provide a wide range of component parts for their vehicles. More recently, vehicle manufacturers have moved towards a competitive sourcing process for automotive parts, including increased purchases from independent suppliers, as they seek lower-priced and/or higher-technology products. Demand for aftermarket products tends to increase when vehicle owners retain their vehicles longer, as these vehicles generally have a greater need for repair.

      The statements regarding industry outlook, trends, the future development of certain automotive systems and other non-historical statements contained in this section are forward-looking statements.

      Industry Trends. The following key trends have been affecting the automotive parts industry over the past several years:

	•	Consumer and Regulatory Focus on Safety. Consumers, and therefore VMs, are increasingly focused on, and governments are increasingly requiring, improved safety in vehicles. For example, on October 29, 2003, Honda announced that substantially all Honda and Acura vehicles will be equipped with side air bags, side curtain air bags and ABS as standard equipment before the end of 2006. Honda also announced that all Honda and Acura SUVs and minivans would be equipped with vehicle stability control systems and rollover sensors for side curtain air bags before the end of 2006. Advances in technology by us and others have led to a number of innovations in our product portfolio, which will allow us to benefit from this trend. Such innovations include electronic vehicle stability control systems, tire pressure monitoring systems, occupant sensing systems, rollover sensing and curtain air bag systems.

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A further example of this is the December 4, 2003 announcement by the Alliance of Automobile Manufacturers and the Insurance Institute for Highway Safety of a new voluntary industry safety commitment to meet new performance criteria designed to enhance occupant protection in front- and side-impact crashes. The announcement indicated that the new performance criteria would encompass a wide range of occupant protection technologies and designs, including enhanced matching of vehicle front structural components and enhanced side-impact protection through the use of features such as side air bags, air bag curtains and revised side-impact structures. By September 1, 2007, at least 50% of all vehicles offered in the United States by participating manufacturers are expected to meet the front-to-side performance criteria, and by September 2009, 100% of the vehicles of participating manufacturers are expected to meet the criteria.

	•	Globalization of Suppliers. To serve multiple markets more cost effectively, many VMs are manufacturing global vehicle platforms, which typically are designed in one location but are produced and sold in many different geographic markets around the world. Having operations in the geographic markets in which VMs produce global platforms enables suppliers to meet VMs’ needs more economically and efficiently. Few suppliers have this global coverage, and it is a source of significant competitive advantage for those suppliers that do.
	•	Shift of Engineering to Suppliers. Increasingly, VMs are focusing their efforts on consumer brand development and overall vehicle design, as opposed to the design of individual vehicle systems. In order to simplify the vehicle design and assembly processes and reduce their costs, VMs increasingly look to their suppliers to provide fully engineered, combinations of components in systems and modules rather than individual components. Systems and modules increase the importance of Tier-1 suppliers because they generally increase the Tier-1 suppliers’ percentage of vehicle content.
	•	Increased Electronic Content and Electronics Integration. The electronic content of vehicles has been increasing and, we believe, will continue to increase in the future. The increase in electronic content is largely driven by consumer and regulatory requirements in Europe and the United States for improved automotive safety and environmental performance, as well as consumer demand for increased vehicle performance and functionality at lower cost. Electronics integration, which generally refers to replacing mechanical with electronic components and integration of mechanical and electrical functions within the vehicle, allows VMs to achieve a reduction in the weight of vehicles and the number of mechanical parts, resulting in easier assembly, enhanced fuel economy, improved emissions control, increased safety and better vehicle performance. As consumers seek more competitively-priced ride and handling performance, safety, security and convenience options in vehicles, such as electronic stability control, active cruise control, air bags, keyless entry and tire pressure monitoring, we believe that electronic content per vehicle will continue to increase.
	•	Increased Emphasis on Speed-to-Market. As VMs are under increasing pressure to adjust to changing consumer preferences and to incorporate technological advances, they are shortening product development times. Shorter product development times also generally reduce product development costs. We believe suppliers that are able to deliver new products to VMs in a timely fashion to accommodate the VMs’ needs will be well positioned to succeed in this evolving marketplace.
	•	Ongoing Automotive Supplier Consolidation. The worldwide automotive parts industry is consolidating as suppliers seek to achieve operating synergies through business combinations, shift production to locations with more flexible work rules and practices, acquire complementary technologies, build stronger customer relationships and follow their customers as they expand globally. The need for suppliers to provide VMs with single-point sourcing of integrated systems and modules on a global basis has helped drive industry consolidation. Furthermore, the cost focus of most major VMs has forced suppliers to reduce costs and improve productivity on an ongoing basis, including achieving economies of scale and consolidation.

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Products and Competition

      The automotive parts industry is extremely competitive. VMs rigorously evaluate us and other suppliers based on many criteria such as quality, price/cost competitiveness, system and product performance, reliability and timeliness of delivery, new product and technology development capability, excellence and flexibility in operations, degree of global and local presence, effectiveness of customer service and overall management capability. We believe we compete effectively with leading automotive suppliers on all of these criteria. For example, we generally follow manufacturing practices designed to improve efficiency, including but not limited to, one-piece-flow machining and assembly, and level and just-in-time scheduling of our manufacturing plants, all of which enable us to manage inventory so that we can deliver components and systems to our customers in the quantities and at the times ordered. Our resulting delivery performance, as measured by our customers, generally meets or exceeds our customers’ expectations. Within each of our product segments, we face significant competition. Our principal competitors include Delphi, Bosch, Conti-Teves, Visteon, Koyo Seiko, ZF, and Advics in the Chassis Systems segment; Autoliv, Delphi, Key Safety, Takata, and Bosch in the Occupant Safety Systems segment; and ITW, Raymond, Nifco, Textron, Kostal, Delphi, Valeo, Tokai Riki and Eaton in the Automotive Components segment.

      The following discussion describes each of our operating segments, as well as the major product groups within each segment.

      Chassis Systems. Our Chassis Systems segment focuses on the design, manufacture and sale of product lines relating to steering, foundation brakes, brake control, modules and suspension. Chassis Systems accounted for approximately $6.5 billion, or 57.4% of our total pro forma sales and $265 million, or 38.6%, of our pro forma segment profit before taxes for the year ended December 31, 2003 and approximately $5.8 billion, or 56.2%, of our total pro forma sales and $283 million, or 45.3% of our pro forma segment profit before taxes for the year ended December 31, 2002.

      We believe our Chassis Systems segment is well positioned to capitalize on growth trends toward increasing active safety systems, particularly in the areas of electric steering, electronic vehicle stability control and other advanced braking systems and integrated vehicle control systems.

      The following table describes the principal product lines in order of 2003 sales in our Chassis Systems segment: