================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                           ---------------------------

                                 AMENDMENT NO. 21

                          TO SCHEDULE TO (RULE 14d-100)

           TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

                                DANA CORPORATION
                       (Name of Subject Company (Issuer))

                             DELTA ACQUISITION CORP.
                               ARVINMERITOR, INC.
                      (Names of Filing Persons (Offerors))

                     COMMON STOCK, PAR VALUE $1.00 PER SHARE
                         (Title of Class of Securities)

                                    23581110
                      (CUSIP Number of Class of Securities)

                            VERNON G. BAKER, II, ESQ.

                               ARVINMERITOR, INC.
                              2135 WEST MAPLE ROAD
                              TROY, MICHIGAN 48084
                           TELEPHONE: (248) 435-1000

(Name, Address and Telephone Numbers of Person Authorized to Receive Notices and
                  Communications on Behalf of Filing Persons)

                                   COPIES TO:

                            DENNIS J. FRIEDMAN, ESQ.
                             STEVEN P. BUFFONE, ESQ.
                           GIBSON, DUNN & CRUTCHER LLP
                                  200 PARK AVE.
                            NEW YORK, NEW YORK 10166
                            TELEPHONE: (212) 351-4000

[ ]   Check the box if the filing relates solely to preliminary communications
      made before the commencement of a tender offer:

[X]   Check the appropriate boxes below to designate any transactions to which
      the statement relates:

      [X]   third-party tender offer subject to Rule 14d-1.

      [ ]   issuer tender offer subject to Rule 13e-4.

      [ ]   going-private transaction subject to Rule 13e-3.

      [ ]   amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results
of the tender offer: [X]
================================================================================

                                   SCHEDULE TO

      This Amendment No. 21 to the Tender Offer Statement on Schedule TO amends
and supplements the statement originally filed on July 9, 2003 (as amended or
supplemented prior to the date hereof, the "Schedule TO") by ArvinMeritor, Inc.,
an Indiana corporation ("Parent"), and Delta Acquisition Corp., a Virginia
corporation and a wholly owned subsidiary of Parent (the "Purchaser"). The
Schedule TO relates to the offer by the Purchaser to purchase (1) all
outstanding shares ("Shares") of common stock, par value $1.00 per share, of
Dana Corporation, a Virginia corporation (the "Company"), and (2) unless and
until validly redeemed by the board of directors of the Company, the associated
rights to purchase shares of Series A Junior Participating Preferred Stock, no
par value, of the Company (the "Rights") issued pursuant to the Rights
Agreement, dated as of April 25, 1996 (as amended from time to time, the "Rights
Agreement"), by and between the Company and Chemical Mellon Shareholder Services
L.L.C., as Rights Agent, at a price of $15.00 per Share, net to the seller in
cash, without interest, upon the terms and subject to the conditions set forth
in the Offer to Purchase, dated July 9, 2003 (as amended or supplemented prior
to the date hereof, the "Offer to Purchase"), and in the related Letter of
Transmittal. Unless the context otherwise requires, all references to the Shares
shall be deemed to include the associated Rights, and all references to the
Rights shall be deemed to include the benefits that may inure to holders of
Rights pursuant to the Rights Agreement. This Amendment No. 21 to the Schedule
TO is being filed on behalf of the Purchaser and Parent.

      Capitalized terms used and not defined herein have the meanings specified
in the Offer to Purchase and the Schedule TO.

      The item numbers and responses thereto below are in accordance with the
requirements of Schedule TO.

ITEMS 1 THROUGH 11.

     Items 1 through 11 of the Schedule TO are hereby amended and supplemented
as follows:

On November 23, 2003, Parent and the Purchaser terminated the Offer and issued
a press release in connection therewith. The Offer had been scheduled to expire
at 5:00 p.m., Eastern Standard Time, on Tuesday, December 2, 2003. The full
text of a press release issued by Parent on November 23, 2003 announcing the
termination of the Offer is filed as Exhibit (a)(5)(V) hereto. The announcement
and termination follow the Company's statement that its Board of Directors has
recommended that its shareholders reject the Offer. No Shares were purchased by
Purchaser pursuant to the Offer, and all tendered Shares will be returned
promptly.

ITEM 12. EXHIBITS

(a)(1)(A)   Offer to Purchase, dated July 9, 2003.*

(a)(1)(B)   Letter of Transmittal.*

(a)(1)(C)   Notice of Guaranteed Delivery.*

(a)(1)(D)   Letter to Brokers, Dealers, Commercial Banks, Trust Companies and
            other Nominees.*

(a)(1)(E)   Form of Letter to Clients for use by Brokers, Dealers, Commercial
            Banks, Trust Companies and other Nominees.*

(a)(1)(F)   Guidelines for Certification of Taxpayer Identification Number on
            Substitute Form W-9.*

(a)(1)(G)   Press release issued by ArvinMeritor, Inc., dated July 8, 2003,
            announcing ArvinMeritor's intention to commence the Offer.*

(a)(1)(H)   Press release issued by ArvinMeritor, Inc., dated July 9, 2003,
            announcing the commencement of the Offer.*

(a)(1)(I)   Summary Advertisement published July 9, 2003.*

(a)(1)(J)   Complaint filed by ArvinMeritor, Inc. on July 8, 2003 in the Circuit
            Court for the City of Buena Vista, Virginia.*

(a)(1)(K)   Complaint filed by ArvinMeritor, Inc. on July 9, 2003 in United
            States District Court for the Western District of Virginia.*

(a)(1)(L)   First Amended Complaint filed by ArvinMeritor, Inc. on July 25, 2003
            in United States District Court for the Western District of
            Virginia.*

                                       1


ITEM 12. EXHIBITS

(a)(1)(M)   First Amended Complaint filed by ArvinMeritor, Inc. on August 5,
            2003 in the Circuit Court for the City of Buena Vista, Virginia.*

(a)(1)(N)   Reply to Dana Counterclaims filed by ArvinMeritor, Inc. on September
            9, 2003 in United States District Court for the Western District of
            Virginia.*

(a)(5)(A)   Press release issued by ArvinMeritor, Inc., dated July 14, 2003,
            relating to supplemental disclosure requested by the Ohio Department
            of Commerce.*

(a)(5)(B)   Letter from ArvinMeritor, Inc. dated July 14, 2003, to Dana
            shareholders residing in Ohio, as posted on ArvinMeritor's website.*

(a)(5)(C)   Transcript of portions of ArvinMeritor's fiscal year 2003
            third-quarter earnings call, held on July 21, 2003, relating to the
            Offer.*

(a)(5)(D)   Press release issued by ArvinMeritor, Inc. dated July 22, 2003,
            responding to Dana Corporation's rejection of the Offer.*

(a)(5)(E)   Text of ArvinMeritor, Inc. form of e-mail replies to investor
            inquiries and requests relating to the Offer.*

(a)(5)(F)   Press release issued by ArvinMeritor, Inc. dated July 28, 2003,
            discussing correspondence delivered to Dana Corporation's Committee
            of Independent Directors.*

(a)(5)(G)   Slides relating to the Offer used by ArvinMeritor, Inc. in a
            presentation dated August 7, 2003.*

(a)(5)(H)   Complaint filed by Dana Corporation on August 14, 2003 in the Court
            of Common Pleas of Lucas County, Ohio.*

(a)(5)(I)   Press release issued by ArvinMeritor, Inc. dated August 18, 2003,
            responding to Dana Corporation's complaint.*

(a)(5)(J)   Press release issued by ArvinMeritor, Inc. dated August 22, 2003,
            announcing its filing for HSR approval.*

(a)(5)(K)   Press release issued by ArvinMeritor, Inc. dated August 22, 2003,
            responding to Dana Corporation's answers and counterclaims to
            ArvinMeritor's complaints.*

(a)(5)(L)   Press release issued by ArvinMeritor, Inc. dated August 28, 2003,
            announcing the extension of the Expiration Date of the Offer.*

(a)(5)(M)   Press release issued by ArvinMeritor, Inc. dated September 8,
            2003, announcing receipt of second request from the FTC.*

(a)(5)(N)   Press release issued by ArvinMeritor, Inc. dated October 2, 2003,
            announcing the extension of the Expiration Date of the Offer.*

(a)(5)(O)   Slide presentation relating to the Offer used by ArvinMeritor, Inc.
            during its Analyst Day Conference on September 30, 2003.*

(a)(5)(P)   Portions of investor presentation and question and answer
            session relating to the Offer used by ArvinMeritor, Inc. during
            its Analyst Day Conference on September 30, 2003.*

(a)(5)(Q)   Motion to Dismiss filed by ArvinMeritor, Inc. on October 14, 2003
            in the Court of Common Pleas of Lucas County, Ohio.*

(a)(5)(R)   Press release issued by ArvinMeritor, Inc. dated October 30, 2003,
            announcing the extension of the Expiration Date of the Offer.*

(a)(5)(S)   Slides and transcript from ArvinMeritor, Inc.'s presentation at the
            Gabelli & Company, Inc.-27th Annual Automotive Aftermarket
            Symposium on November 5, 2003.*

(a)(5)(T)   Transcript of portion of ArvinMeritor, Inc.'s fiscal year 2003
            fourth-quarter earnings call, held on November 13, 2003, relating
            to the Offer.*

(a)(5)(U)   Press release issued by ArvinMeritor, Inc. dated November 17, 2003.*

(a)(5)(V)   Press release issued by ArvinMeritor, Inc. dated November 23, 2003.

(c)         Not applicable.
(d)         Not applicable.
(e)         Not applicable.
(f)         Not applicable.
(g)         Not applicable.
(h)         Not applicable.
----------
* Previously filed

                                      2

                                    SIGNATURE

      After due inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Date: November 23, 2003


                                   DELTA ACQUISITION CORP.

                                   By:      /s/ LARRY D. YOST
                                   ---------------------------------------------
                                   Name:  Larry D. Yost
                                   Title: Chairman of the Board and
                                          Chief Executive Officer

                                   ARVINMERITOR, INC.

                                   By:    /s/ LARRY D. YOST
                                   ---------------------------------------------
                                   Name:  Larry D. Yost
                                   Title: Chairman of the Board and Chief
                                          Executive Officer


                                      3


                                  EXHIBIT INDEX

EXHIBIT NO.                     DESCRIPTION
-----------                     -----------
(a)(1)(A)   Offer to Purchase, dated July 9, 2003.*

(a)(1)(B)   Letter of Transmittal.*

(a)(1)(C)   Notice of Guaranteed Delivery.*

(a)(1)(D)   Letter to Brokers, Dealers, Commercial Banks, Trust Companies and
            other Nominees.*

(a)(1)(E)   Form of Letter to Clients for use by Brokers, Dealers, Commercial
            Banks, Trust Companies and other Nominees.*

(a)(1)(F)   Guidelines for Certification of Taxpayer Identification Number on
            Substitute Form W-9.*

(a)(1)(G)   Press release issued by ArvinMeritor, Inc., dated July 8, 2003,
            announcing ArvinMeritor's intention to commence the Offer.*

(a)(1)(H)   Press release issued by ArvinMeritor, Inc., dated July 9, 2003,
            announcing the commencement of the Offer.*

(a)(1)(I)   Summary Advertisement published July 9, 2003.*

(a)(1)(J)   Complaint filed by ArvinMeritor, Inc. on July 8, 2003 in the Circuit
            Court for the City of Buena Vista, Virginia.*

(a)(1)(K)   Complaint filed by ArvinMeritor, Inc. on July 9, 2003 in United
            States District Court for the Western District of Virginia.*

(a)(1)(L)   First Amended Complaint filed by ArvinMeritor, Inc. on July 25, 2003
            in United States District Court for the Western District of
            Virginia.*

(a)(1)(M)   First Amended Complaint filed by ArvinMeritor, Inc. on August 5,
            2003 in the Circuit Court for the City of Buena Vista, Virginia.*

(a)(1)(N)   Reply to Dana Counterclaims filed by ArvinMeritor, Inc. on September
            9, 2003 in United States District Court for the Western District of
            Virginia.*

(a)(5)(A)   Press release issued by ArvinMeritor, Inc., dated July 14, 2003,
            relating to supplemental disclosure requested by the Ohio Department
            of Commerce.*

(a)(5)(B)   Letter from ArvinMeritor, Inc. dated July 14, 2003, to Dana
            shareholders residing in Ohio, as posted on ArvinMeritor's website.*

(a)(5)(C)   Transcript of portions of ArvinMeritor's fiscal year 2003
            third-quarter earnings call, held on July 21, 2003, relating to the
            Offer.*

(a)(5)(D)   Press release issued by ArvinMeritor, Inc. dated July 22, 2003,
            responding to Dana Corporation's rejection of the Offer.*

(a)(5)(E)   Text of ArvinMeritor, Inc. form of e-mail replies to investor
            inquiries and requests relating to the Offer.*

(a)(5)(F)   Press release issued by ArvinMeritor, Inc. dated July 28, 2003,
            discussing correspondence delivered to Dana Corporation's Committee
            of Independent Directors.*

(a)(5)(G)   Slides relating to the Offer used by ArvinMeritor, Inc. in a
            presentation dated August 7, 2003.*

(a)(5)(H)   Complaint filed by Dana Corporation on August 14, 2003 in the Court
            of Common Pleas of Lucas County, Ohio.*

                                  EXHIBIT INDEX

EXHIBIT NO.                     DESCRIPTION
-----------                     -----------

(a)(5)(I)   Press release issued by ArvinMeritor, Inc. dated August 18, 2003,
            responding to Dana Corporation's complaint.*

(a)(5)(J)   Press release issued by ArvinMeritor, Inc. dated August 22, 2003,
            announcing its filing for HSR approval.*

(a)(5)(K)   Press release issued by ArvinMeritor, Inc. dated August 22, 2003,
            responding to Dana Corporation's answers and counterclaims to
            ArvinMeritor's complaints.*

(a)(5)(L)   Press release issued by ArvinMeritor, Inc. dated August 28, 2003,
            announcing the extension of the Expiration Date of the Offer.*

(a)(5)(M)   Press release issued by ArvinMeritor, Inc. dated September 8, 2003,
            announcing receipt of second request from the FTC.*

(a)(5)(N)   Press release issued by ArvinMeritor, Inc. dated October 2, 2003,
            announcing the extension of the Expiration Date of the Offer.*

(a)(5)(O)   Slide presentation relating to the Offer used by ArvinMeritor, Inc.
            during its Analyst Day Conference on September 30, 2003.*

(a)(5)(P)   Portions of investor presentation and question and answer session
            relating to the Offer used by ArvinMeritor, Inc. during its Analyst
            Day Conference on September 30, 2003.*

(a)(5)(Q)   Motion to Dismiss filed by ArvinMeritor, Inc. on October 14, 2003
            in the Court of Common Pleas of Lucas County, Ohio.*

(a)(5)(R)   Press release issued by ArvinMeritor, Inc. dated October 30, 2003,
            announcing the extension of the Expiration Date of the Offer.*

(a)(5)(S)   Slides and transcript from ArvinMeritor, Inc.'s presentation at the
            Gabelli & Company, Inc.-27th Annual Automotive Aftermarket
            Symposium on November 5, 2003.*

(a)(5)(T)   Transcript of portion of ArvinMeritor, Inc.'s fiscal year 2003
            fourth-quarter earnings call, held on November 13, 2003, relating
            to the Offer.*

(a)(5)(U)   Press release issued by ArvinMeritor, Inc. dated November 17,2003.*

(a)(5)(V)   Press release issued by ArvinMeritor, Inc. dated November 23, 2003.

(b)         Not applicable.
(c)         Not applicable.
(d)         Not applicable.
(e)         Not applicable.
(f)         Not applicable.
(g)         Not applicable.
(h)         Not applicable.
----------
* Previously filed