Document:

<PAGE>
                                                                     EXHIBIT 4.6

================================================================================

                             SUPPLEMENTAL INDENTURE

                                      NO. 1

                                       TO

                      INDENTURE DATED AS OF MARCH 20, 2001

================================================================================

<PAGE>

                  This SUPPLEMENTAL INDENTURE NO. 1 to INDENTURE (this
"Supplemental Indenture") is entered into among Lear Corporation, a Delaware
corporation (the "Company"), Lear Operations Corporation, a Delaware corporation
("LOC"), Lear Corporation Automotive Holdings, a Delaware corporation ("LCAH"),
Lear Seatings Holdings Corp. # 50, a Delaware corporation ("Lear No. 50"), Lear
Corporation EEDS and Interiors, a Delaware corporation ("Lear Interiors"), Lear
Corporation Automotive Systems, an Ohio corporation ("LCAS"), Lear Technologies,
LLC, a Delaware limited liability company ("Lear Tech"), Lear Midwest
Automotive, Limited Partnership, a Delaware limited partnership ("LMA"), Lear
East, LP, a Pennsylvania limited partnership ("Lear East"), Lear Automotive
(EEDS) Spain S.L., an entity organized under the laws of Spain ("Lear Spain"),
and The Bank of New York, a New York banking corporation, as Trustee (the
"Trustee").

                                    RECITALS

                  WHEREAS, the Company, LOC, LCAH, Lear No. 50, Lear Interiors
and the Trustee have entered into that certain Indenture dated as of March 20,
2001 (the "Indenture"), providing for the issuance and delivery by the Company
of its 8 1/8% Senior Notes due 2008 (the "Notes");

                  WHEREAS, LCAS, Lear Tech, LMA, Lear East and Lear Spain, each
of which is a direct or indirect subsidiary of the Company, will each become,
concurrently with the execution and delivery of this Supplemental Indenture, a
guarantor under the Principal Credit Facilities; and

                  WHEREAS, pursuant to Section 10.06 of the Indenture, any
subsidiary of the Company that becomes a guarantor under the Principal Credit
Facilities is required to become a Guarantor under the Indenture;

                  NOW, THEREFORE, in consideration of the mutual agreements
contained herein and for other good and valuable consideration, the receipt and
adequacy of which are hereby acknowledged, the parties hereto agree as follows
for the benefit of each other party and for the equal and ratable benefit of the
Holders of the Notes:

                  Section 1.        GUARANTEE.

                   For value received, each of LCAS, Lear Tech, LMA, Lear East
and Lear Spain hereby agrees to become a party to the Indenture as a Guarantor
under and pursuant to Article 10 of the Indenture and to jointly and severally
unconditionally guarantee to each Holder and the Trustee (a) the due and
punctual payment in full of principal of and interest on the Notes when due,
whether at stated maturity, upon acceleration, redemption or otherwise, (b) the
due and punctual payment in

                                       -2-

<PAGE>

full of interest on the overdue principal of and, to the extent permitted by
law, interest on the Notes, and (c) the due and punctual payment of all other
Obligations of the Company and the other Guarantors to the Holders and the
Trustee under the Indenture and the Notes, including, without limitation, the
payment of fees, expenses, indemnification or other amounts.

                  Section 2.  MISCELLANEOUS.

                  2.1. GOVERNING LAW. THIS SUPPLEMENTAL INDENTURE SHALL BE
GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

                  2.2. Confirmation of the Indenture. Except as amended hereby,
the Indenture shall remain in full force and effect and is hereby ratified and
confirmed in all respects.

                  2.3. Multiple Counterparts. The parties may sign multiple
counterparts of this Supplemental Indenture. Each signed counterpart shall be
deemed an original, but all of them together represent one and the same
agreement.

                  2.4. Separability. Each provision of this Supplemental
Indenture shall be considered separable and if for any reason any provision
which is not essential to the effectuation of the basic purpose of this
Supplemental Indenture shall be invalid, illegal or unenforceable, the validity,
legality and enforceability of the remaining provisions shall not in any way be
affected or impaired thereby.

                  2.5. Headings. The captions of the various section headings of
this Supplemental Indenture have been inserted for convenience of reference
only, are not to be considered a part hereof, and shall in no way modify or
restrict any of the terms or provisions hereof.

                  2.6. The Trustee. The Trustee shall not be responsible in any
manner whatsoever for or in respect of the validity or sufficiency of this
Supplemental Indenture or for or in respect of the recitals contained herein,
all of which recitals are made solely by the Company and the Guarantors.

                  2.7. Definitions. All terms defined in the Indenture shall
have the same meaning in this Supplemental Indenture unless otherwise defined
herein.

                            [signature page follows]

<PAGE>

                  IN WITNESS WHEREOF, the parties hereto caused this
Supplemental Indenture to be duly executed as of this 16th day of November,
2001.

                           LEAR CORPORATION

                           By: /s/ Cameron Hitchcock
                              --------------------------------------
                               Name: Cameron Hitchcock
                               Title: Vice President & Treasurer

                           LEAR OPERATIONS CORPORATION

                           By: /s/ Edward Mahon
                              --------------------------------------
                               Name: Edward Mahon
                               Title: Authorized Officer

                           LEAR CORPORATION AUTOMOTIVE HOLDINGS

                           By: /s/ Joseph McCarthy
                              --------------------------------------
                               Name: Joseph McCarthy
                               Title: Vice President

                           LEAR SEATINGS HOLDINGS CORP. # 50

                           By: /s/ Joseph McCarthy
                              --------------------------------------
                               Name: Joseph McCarthy
                               Title: Secretary and General Counsel

                           LEAR CORPORATION EEDS AND INTERIORS

                           By: /s/ Cameron Hitchcock
                              --------------------------------------
                               Name: Cameron Hitchcock
                               Title: Vice President and Treasurer

                           LEAR CORPORATION AUTOMOTIVE SYSTEMS

                           By: /s/ Edward Mahon
                              --------------------------------------
                               Name: Edward Mahon
                               Title: Authorized Officer

<PAGE>

                           LEAR TECHNOLOGIES, LLC
                           By: Lear Corporation,
                           its Sole Member

                           By:  /s/ Cameron Hitchcock
                              ---------------------------------------------
                               Name: Cameron Hitchcock
                               Title: Vice President and Treasurer

                           LEAR MIDWEST AUTOMOTIVE, LIMITED PARTNER
                           By: Lear Corporation Mendon,
                           as General Partner

                           By:  /s/ Joseph McCarthy
                              ---------------------------------------------
                               Name: Joseph McCarthy
                               Title: Vice President and Secretary

                           LEAR EAST, LP
                           By:  Lear Corporation Global Development, Inc.,
                           as General Partner

                           By:  /s/ Joseph McCarthy
                              ---------------------------------------------
                               Name: Joseph McCarthy
                               Title: Vice President and Secretary

                           LEAR AUTOMOTIVE (EEDS) SPAIN S.L.

                           By:  /s/ Joseph McCarthy
                              ---------------------------------------------
                               Name: Joseph McCarthy
                               Title: Authorized Representative

                           THE BANK OF NEW YORK, as Trustee

                           By:  /s/ Luis Perez
                              ---------------------------------------------
                               Name: Luis Perez
                               Title: Asst. Vice President<PAGE>
                                                                     EXHIBIT 4.7

================================================================================

                             SUPPLEMENTAL INDENTURE

                                      NO. 2

                                       TO

                      INDENTURE DATED AS OF MARCH 20, 2001

================================================================================

<PAGE>
                  This SUPPLEMENTAL INDENTURE NO. 2 to INDENTURE (this
"Supplemental Indenture") is entered into among Lear Corporation, a Delaware
corporation (the "Company"), Lear Operations Corporation, a Delaware corporation
("LOC"), Lear Corporation Automotive Holdings, a Delaware corporation ("LCAH"),
Lear Seatings Holdings Corp. # 50, a Delaware corporation ("Lear No. 50"), Lear
Corporation EEDS and Interiors, a Delaware corporation ("Lear Interiors"), Lear
Corporation Automotive Systems, an Ohio corporation ("LCAS"), Lear Technologies,
LLC, a Delaware limited liability company ("Lear Tech"), Lear Midwest
Automotive, Limited Partnership, a Delaware limited partnership ("LMA"), Lear
East, LP, a Pennsylvania limited partnership ("Lear East"), Lear Automotive
(EEDS) Spain S.L., an entity organized under the laws of Spain ("Lear Spain"),
Lear Corporation Mexico, S.A. de C.V., an entity organized under the laws of
Mexico ("Lear Mexico"), and The Bank of New York, a New York banking
corporation, as Trustee (the "Trustee").

                                    RECITALS

                  WHEREAS, the Company, LOC, LCAH, Lear No. 50, Lear Interiors,
LCAS, Lear Tech, LMA, Lear East, Lear Spain and the Trustee are parties to that
certain Indenture dated as of March 20, 2001, as amended by Supplemental
Indenture No. 1 thereto dated as of November 16, 2001 (the "Indenture"),
providing for the issuance and delivery by the Company of its 8 1/8% Senior
Notes due 2008 (the "Notes");

                  WHEREAS, Lear Mexico, an indirect subsidiary of the Company,
will become, concurrently with the execution and delivery of this Supplemental
Indenture, a guarantor under the Principal Credit Facilities; and

                  WHEREAS, pursuant to Section 10.06 of the Indenture, any
subsidiary of the Company that becomes a guarantor under the Principal Credit
Facilities is required to become a Guarantor under the Indenture;

                  NOW, THEREFORE, in consideration of the mutual agreements
contained herein and for other good and valuable consideration, the receipt and
adequacy of which are hereby acknowledged, the parties hereto agree as follows
for the benefit of each other party and for the equal and ratable benefit of the
Holders of the Notes:

                                       -2-

<PAGE>
                  Section 1. GUARANTEE.

                   For value received, Lear Mexico hereby agrees to become a
party to the Indenture as a Guarantor under and pursuant to Article 10 of the
Indenture and to jointly and severally unconditionally guarantee to each Holder
and the Trustee (a) the due and punctual payment in full of principal of and
interest on the Notes when due, whether at stated maturity, upon acceleration,
redemption or otherwise, (b) the due and punctual payment in full of interest on
the overdue principal of and, to the extent permitted by law, interest on the
Notes, and (c) the due and punctual payment of all other Obligations of the
Company and the other Guarantors to the Holders and the Trustee under the
Indenture and the Notes, including, without limitation, the payment of fees,
expenses, indemnification or other amounts.

                  Section 2.  MISCELLANEOUS.

                  2.1. GOVERNING LAW. THIS SUPPLEMENTAL INDENTURE SHALL BE
GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF NEW YORK.

                  2.2. Confirmation of the Indenture. Except as amended hereby,
the Indenture shall remain in full force and effect and is hereby ratified and
confirmed in all respects.

                  2.3. Multiple Counterparts. The parties may sign multiple
counterparts of this Supplemental Indenture. Each signed counterpart shall be
deemed an original, but all of them together represent one and the same
agreement.

                  2.4. Separability. Each provision of this Supplemental
Indenture shall be considered separable and if for any reason any provision
which is not essential to the effectuation of the basic purpose of this
Supplemental Indenture shall be invalid, illegal or unenforceable, the validity,
legality and enforceability of the remaining provisions shall not in any way be
affected or impaired thereby.

                  2.5. Headings. The captions of the various section headings of
this Supplemental Indenture have been inserted for convenience of reference
only, are not to be considered a part hereof, and shall in no way modify or
restrict any of the terms or provisions hereof.

                  2.6. The Trustee. The Trustee shall not be responsible in any
manner whatsoever for or in respect of the validity or sufficiency of this
Supplemental Indenture or for or in respect of the recitals contained herein,
all of which recitals are made solely by the Company and the Guarantors.

                  2.7. Definitions. All terms defined in the Indenture shall
have the same meaning in this Supplemental Indenture unless otherwise defined
herein.

                            [signature page follows]

<PAGE>
                  IN WITNESS WHEREOF, the parties hereto caused this
Supplemental Indenture to be duly executed as of this 15th day of January, 2002.

                                            LEAR CORPORATION

                                            By: /s/ Cameron Hitchcock
                                               ---------------------------------
                                               Name: Cameron Hitchcock
                                               Title: Vice President & Treasurer

                                            LEAR OPERATIONS CORPORATION

                                            By: /s/ Joseph McCarthy
                                               ---------------------------------
                                               Name: Joseph McCarthy
                                               Title: Vice President, Secretary
                                                      & General Counsel

                                            LEAR CORPORATION AUTOMOTIVE HOLDINGS

                                            By: /s/ Joseph McCarthy
                                               ---------------------------------
                                               Name: Joseph McCarthy
                                               Title: Vice President

                                            LEAR SEATINGS HOLDINGS CORP. # 50

                                            By: /s/ Joseph McCarthy
                                               ---------------------------------
                                               Name: Joseph McCarthy
                                               Title: Secretary and
                                                      General Counsel

                                            LEAR CORPORATION EEDS AND INTERIORS

                                            By: /s/ Cameron Hitchcock
                                               ---------------------------------
                                               Name: Cameron Hitchcock
                                               Title: Vice President and
                                                      Treasurer

                                            LEAR CORPORATION AUTOMOTIVE SYSTEMS

                                            By: /s/ Joseph McCarthy
                                               ---------------------------------
                                               Name: Joseph McCarthy
                                               Title: Vice President and
                                                      Secretary

<PAGE>

                                  LEAR TECHNOLOGIES, LLC
                                  By:  Lear Corporation,
                                  its Sole Member

                                  By: /s/ Cameron Hitchcock
                                      -----------------------------------------
                                      Name: Cameron Hitchcock
                                      Title: Vice President and Treasurer

                                  LEAR MIDWEST AUTOMOTIVE, LIMITED PARTNER
                                  By:  Lear Corporation Mendon,
                                  as General Partner

                                  By: /s/ Joseph McCarthy
                                      -----------------------------------------
                                      Name: Joseph McCarthy
                                      Title: Vice President and Secretary

                                  LEAR EAST, LP
                                  By: Lear Corporation Global Development, Inc.,
                                  as General Partner

                                  By: /s/ Joseph McCarthy
                                      -----------------------------------------
                                      Name: Joseph McCarthy
                                      Title: Vice President and Secretary

                                  LEAR AUTOMOTIVE (EEDS) SPAIN S.L.

                                  By: /s/ Joseph McCarthy
                                      -----------------------------------------
                                      Name: Joseph McCarthy
                                      Title: Authorized Representative

                                  LEAR CORPORATION MEXICO, S.A. de C.V.

                                  By: /s/ Joseph McCarthy
                                      -----------------------------------------
                                      Name: Joseph McCarthy
                                      Title: Authorized Representative

<PAGE>

                                  THE BANK OF NEW YORK, as Trustee

                                  By: /s/ Thomas E. Tabor
                                     -------------------------------------------
                                     Name: Thomas E. Tabor
                                     Title: Vice President

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00035-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00035-of-00352.parquet"}]]