Exhibit 31(a)

CERTIFICATIONS

I, John C. Plant, certify that:

1.                                      I have reviewed this Amendment No. 1 to the annual report on Form 10-K/A (this “Report”) of TRW Automotive Holdings Corp.; and

2.                                      Based on my knowledge, this Report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this Report.