CERTIFICATION
        Exhibit 31.1



       I, Timothy M. Manganello, certify that:

       1.   I have reviewed this quarterly report on Form
       10-Q of BorgWarner Inc.;

       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;

       3.   Based on my knowledge, the financial statements,
       and other financial information included in this
       report, fairly present in all material respects the
       financial condition, results of operations and cash
       flows of the registrant as of, and for, the periods
       presented in this report;

       4.   The registrant's other certifying officer(s) and
       I are responsible for establishing and
       maintaining disclosure controls and procedures (as
       defined in Exchange Act Rules 13a-15(e) and 15d-15(e))
       for the registrant and have:

            a)   Designed such disclosure controls and
       procedures, or caused such disclosure controls and
       procedures to be designed under our supervision, to
       ensure that material information relating to the
       registrant, including its consolidated subsidiaries,
       is made known to us by others within those entities,
       particularly during the period in which this report is
       being prepared;

            b)   Evaluated the effectiveness of the
       registrant's disclosure controls and procedures and
       presented in this report our conclusions about the
       effectiveness of the disclosure controls and
       procedures, as of the end of the period covered by
       this report based on such evaluation; and

            c)   Disclosed in this report any change in the
       registrant's internal control over financial reporting
       that occurred during the registrant's most recent
       fiscal quarter (the registrant's fourth fiscal quarter
       in the case of an annual report) that has materially
       affected, or is reasonably likely to materially
       affect, the registrant's internal control over
       financial reporting;

       5.   The registrant's other certifying officer(s) and
       I have disclosed, based on our most recent evaluation
       of internal control over financial reporting, to the
       registrant's auditors and the audit committee of the
       registrant's board of directors (or persons performing
       the equivalent functions):

            a)   All significant deficiencies and material
       weaknesses in the design or operation of internal
       controls over financial reporting which are reasonably
       likely to adversely affect the registrant's ability to
       record, process, summarize and report financial
       information; and

            b)   Any fraud, whether or not material, that
       involves management or other employees who have a
       significant role in the registrant's internal controls
       over financial reporting.

       Date: November 9, 2004



   /s/  Timothy M.  Manganello
  Timothy M. Manganello
  Chairman and Chief Executive Officer