<PAGE>

                                                                    EXHIBIT 4.11

                                 THIRD AMENDMENT


                  THIRD AMENDMENT, dated as of March 29, 2002 (this
"Amendment"), to the Credit Agreement, dated as of March 29, 2000, as amended by
the First Amendment dated as of April 23, 2001 and the Second Amendment dated as
of June 28, 2001 (as the same may be further amended, supplemented or otherwise
modified from time to time, the "Credit Agreement"), among VIASYSTEMS GROUP,
INC., a Delaware corporation ("Holdings"), VIASYSTEMS, INC., a Delaware
corporation (the "US Borrower"), VIASYSTEMS CANADA HOLDINGS, INC. (f/k/a
VIASYSTEMS CANADA, INC.), a Quebec corporation (the "Canadian Borrower"), PRINT
SERVICE HOLDING N.V., a company organized under the laws of the Netherlands
("Print Service" and together with the Canadian Borrower and any Future Foreign
Subsidiary Borrower, the "Foreign Subsidiary Borrowers"), the several banks and
other financial institutions from time to time parties thereto (the "Lenders"),
J.P. MORGAN BANK CANADA (f/k/a THE CHASE MANHATTAN BANK OF CANADA), as Canadian
administrative agent (in such capacity, the "Canadian Administrative Agent"),
J.P. MORGAN EUROPE LIMITED (f/k/a CHASE MANHATTAN INTERNATIONAL LIMITED), as the
multicurrency administrative agent (in such capacity, the "Multicurrency
Administrative Agent"), and JPMORGAN CHASE BANK (f/k/a THE CHASE MANHATTAN
BANK), as administrative agent for the Lenders (in such capacity, the
"Administrative Agent").


                                   WITNESSETH:

                  WHEREAS, pursuant to the Credit Agreement, the Lenders have
agreed to make, and have made, certain loans and other extensions of credit to
the Borrowers; and

                  WHEREAS, the Borrowers have requested, and upon the
effectiveness of this Amendment, the parties hereto have agreed, that certain
provisions of the Credit Agreement be amended upon the terms and conditions set
forth below;

                  NOW, THEREFORE, in consideration of the premises and of the
mutual agreements herein contained, the parties hereto hereby agree as follows:

                  SECTION 1. Defined Terms. Terms defined in the Credit
Agreement and used herein shall have the meanings given to them in the Credit
Agreement. Unless otherwise indicated, all Section and subsection references are
to the Credit Agreement.

                  SECTION 2. Amendments to Subsection 1.1 (Definitions).
Subsection 1.1 of the Credit Agreement is hereby amended as follows:

         (a) by deleting the definition of "Applicable Margin" in its entirety
and substituting in lieu thereof the following:

                  "Applicable Margin": for each Type of Loan and for purposes of
         subsections 2.4, 2.6, 3.4, 3.6, 4.4 and 5.4, the rate per annum set
         forth under the relevant column heading below:


<PAGE>
<Table>
<Caption>
                                               Base Rate Loans

                Type                                                      Applicable Margin
                ----                                                      -----------------
<S>                                                                       <C>
     Tranche B Term Loans                                                             3.00%
     Tranche A Chips Term Loans                                                       2.50%
     Tranche B Chips Term Loans                                                       3.00%
     Revolving Credit Loans                                                           2.50%
       (including Swing Line Loans)
</Table>

<Table>
<Caption>
                                         Eurocurrency Loans and B/As

                Type                                                      Applicable Margin
                ----                                                      -----------------
<S>                                                                       <C>
      Tranche B Term Loans                                                            4.00%
      Tranche A Chips Term Loans                                                      3.50%
      Tranche B Chips Term Loans                                                      4.00%
      Revolving Credit Loans                                                          3.50%
           (including Swing Line Loans)
</Table>

<Table>
<Caption>
                                 Commitment Fee

                                                              Applicable Margin
                                                              -----------------
<S>                                                           <C>
                                                                          0.50%
</Table>

                  (b) by adding thereto the following definitions in their
appropriate alphabetical order:

                  "Chinese Opco": each of Viasystems Asia Pacific Company Ltd.,
         Viasystems EMS Shenzhen Company Ltd., Shanghai Viasystems EMS Co. Ltd.,
         Viasystems CY EMS Shenzhen Company Ltd., Kalex Printed Circuit Board
         Limited, Guangzhou Termbray Electronics Technology Co., Ltd., Guanzhou
         Termbray Circuit Board Co. Ltd., Kalex Multi-Layer Circuit Board (Zhong
         Shan) Ltd. and Qingdao Viasystems Telecommunications Technologies Co.
         Ltd.

                  "Consolidated Net Sales": for any period, with respect to any
         Person, the amount which, in conformity with GAAP, would be set forth
         opposite the caption "Net Sales" (or like caption) on a consolidated
         statement of operations of such Person and its Subsidiaries for such
         period.

                  "Third Amendment": the Third Amendment, dated as of March 29,
         2002, to this Agreement.

                  "Third Amendment Effective Date": the date on which the Third
         Amendment becomes effective in accordance with its terms, which date is
         March 29, 2002.


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<PAGE>


                  SECTION 3. Amendment to Subsection 11.2 (Conditions to Each
Loan). Subsection 11.2 of the Credit Agreement is hereby amended by adding
thereto the following paragraph (d):

                  (d) Consolidated Net Sales. With respect to the making of any
         Loan or the issuance of any Letter of Credit if, after giving effect
         thereto, the sum of the Revolving Credit Loans, Letter of Credit
         Outstandings and outstanding Swing Line Loans would exceed
         $100,000,000, the Administrative Agent shall have received a report in
         reasonable detail and certified by a Responsible Officer, demonstrating
         that the Consolidated Net Sales of the US Borrower and its Subsidiaries
         for the period of eight consecutive calendar weeks ending on the Friday
         immediately preceding the date of such Loan or issuance, as the case
         may be, exceeds the amount set forth on Schedule 11.2 for such
         eight-week period.

                  SECTION 4. Amendment to Subsection 12.2 (Certificates; Other
Information). Subsection 12.2(c) of the Credit Agreement is hereby amended by
inserting, immediately after the phrase "succeeding fiscal year", the
paranthetical "(set forth on a quarter-by-quarter basis for such fiscal year)".

                  SECTION 5. Amendment to Subsection 12.11 (Pledge During Event
of Default). Subsection 12.11 of the Credit Agreement is hereby amended by
deleting clause (i) in the second proviso thereof in its entirety and
substituting in lieu thereof the following:

         "(i) except with respect to the Capital Stock of Viasystems Luxembourg
         S.a.r.l., only 65% of the voting Capital Stock of any direct Foreign
         Subsidiary of the US Borrower or its Domestic Subsidiaries need be so
         pledged and"

                  SECTION 6. Amendment to Subsection 13.2 (Limitation on
Indebtedness). Subsection 13.2 of the Credit Agreement is hereby amended by
adding the following sentence at the end thereof:

                  "Notwithstanding the foregoing, during the period from March
                  29, 2002 to and including May 29, 2002, no Subsidiary of
                  Holdings that is organized under the laws of or contains
                  assets located in the People's Republic of China shall create,
                  incur, assume or suffer to exist any Indebtedness other than
                  (i) Indebtedness of any such Subsidiary that exists as of the
                  Third Amendment Effective Date listed on Schedule 13.2B and
                  extensions, renewals or replacements thereof provided that no
                  such extension, renewal or replacement shall increase the
                  principal amount thereof, (ii) Indebtedness of such
                  Subsidiaries permitted pursuant to Section 13.2(b) and (iii)
                  additional Indebtedness of such Subsidiaries in an aggregate
                  principal amount which, together with the aggregate principal
                  amount of Indebtedness outstanding pursuant to the foregoing
                  clause (i), does not exceed the Equivalent Amount of
                  $27,600,000 at any one time."


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<PAGE>


                  SECTION 7. Amendment to Subsection 13.4 (Limitation on
Guarantee Obligations). Subsection 13.4 of the Credit Agreement is hereby
amended by deleting paragraph (h) thereof in its entirety and substituting in
lieu thereof the following:

         "(h) [Intentionally omitted];"

                  SECTION 8. Amendment to Subsection 13.7 (Limitation on
Dividends). Subsection 13.7 of the Credit Agreement is hereby amended by
deleting the period at the end of paragraph (f) thereof and adding thereto the
following:

         "provided, that no such Restricted Payments shall be made prior to the
         receipt of the financial statements of the US Borrower pursuant to
         subsection 12.1(b) for the fiscal quarter ended December 31, 2002."

                  SECTION 9. Amendment to Subsection 13.8 (Limitation on Capital
Expenditures). Subsection 13.8 of the Credit Agreement is hereby amended by
deleting the amount "$120,000,000" where it appears therein corresponding to
fiscal year 2002 and substituting in lieu thereof the amount "$85,000,000".

                  SECTION 10. Amendment to Subsection 13.11 (Limitation on
Transactions with Affiliates). Subsection 13.11 of the Credit Agreement is
hereby amended by adding the following sentence at the end thereof:

                  "Notwithstanding anything to the contrary in this Agreement
                  (including the foregoing clauses (a) and (b)), neither
                  Holdings nor any of its Subsidiaries shall make any payment
                  with respect to any management fee (i) to any Affiliate of
                  Holdings or any of its Subsidiaries or (ii) to HMTF or any of
                  its Affiliates."

                  SECTION 11. Amendments to Subsection 13.17 (Passive Status of
International Holdings). Subsection 13.17 of the Credit Agreement is hereby
amended by deleting such subsection in its entirety and substituting in lieu
thereof the following:

         "13.17 Passive Status. (a) Permit International Holdings to (i)
         conduct, transact or otherwise engage in, or commit to conduct,
         transact or otherwise engage in, any business or operations other than
         those incidental to its ownership of the Capital Stock of certain
         Subsidiaries of the US Borrower, (ii) incur, create, assume or suffer
         to exist any Indebtedness or other liabilities or financial
         obligations, except obligations pursuant to the Loan Documents to which
         it is a party and Indebtedness to the US Borrower in which the
         Collateral Agent has been granted a Lien for the ratable benefit of the
         Secured Parties, or (iii) own, lease, manage or otherwise operate any
         properties or assets other than the ownership of shares of Capital
         Stock of certain Subsidiaries of the US Borrower.

         (b) Permit any Subsidiary of Holdings that is organized under the laws
         of or owns assets located in the People's Republic of China (other than
         any Chinese Opco), or any Subsidiary of International Holdings that
         directly or indirectly owns the Capital Stock of any such Subsidiary or
         any Chinese Opco, to (i) conduct, transact or otherwise engage in, or
         commit to conduct, transact or otherwise engage in, any business or
         operations other than those incidental to its ownership of the Capital
         Stock of any other Person, (ii) incur, create, assume or suffer to
         exist any Indebtedness or other liabilities or financial obligations,
         except obligations pursuant to the Loan Documents to which it is a
         party, or


                                       4
<PAGE>


         (iii) own, lease, manage or otherwise operate any properties or assets
         other than the ownership of shares of Capital Stock of any other
         Person."

                  SECTION 12. Amendment to Schedules. The Schedules to the
Credit Agreement are hereby amended by adding thereto Schedules 11.2 and 13.2B
in the form of Schedules 11.2 and 13.2B, respectively, to this Amendment.

                  SECTION 13. Forbearance. The Administrative Agent and the
Lenders hereby agree to forbear from the exercise of any rights and remedies any
of them may have under the Credit Agreement or any other Loan Document as a
result of any Event of Default under Section 12.1(a) (with respect to the
requirement that the financial statements furnished thereunder be reported on by
independent certified public accountants without a "going concern" or like
qualification or exception) or 13.1 of the Credit Agreement until the earlier to
occur of (a) May 29, 2002 and (b) the occurrence of an Event of Default under
the Credit Agreement (other than pursuant to Section 12.1(a) (as described
above) or 13.1 of the Credit Agreement). The forbearance of the Administrative
Agent and the Lenders under this Section 13 shall not constitute an amendment,
waiver or modification of the Credit Agreement or any other Loan Document.

                  SECTION 14. Retention of Financial Advisor. The Borrowers
agrees to pay or reimburse the Administrative Agent for all reasonable costs and
expenses of FTI/Policano & Manzo incurred by it pursuant to the terms of that
certain letter agreement dated December 12, 2001, by and between Simpson,
Thacher & Bartlett, counsel to the Administrative Agent, and FTI/Policano &
Manzo.

                  SECTION 15. Representations and Warranties. After giving
effect to this Amendment, Holdings and the US Borrower (and each Foreign
Subsidiary Borrower, only as to itself, and its Subsidiaries) hereby confirm,
reaffirm and restate that the representations and warranties set forth in
Section 10 of the Credit Agreement (other than Sections 10.2, 10.7 and 10.20)
are true and correct in all material respects as if made on and as of the date
hereof except for any representation or warranty made as of the earlier date,
which representation or warranty shall have been true and correct in all
material respects as of such earlier date.

                  SECTION 16. Conditions to Effectiveness. This Amendment shall
become effective upon receipt by the Administrative Agent of:

                  (a) Amendment to Credit Agreement. Counterparts of this
                  Amendment, duly executed and delivered by Holdings, the US
                  Borrower and the Foreign Subsidiary Borrowers.

                  (b) Amendment to Guarantee and Collateral Agreement. (i)
                  Counterparts of an amendment to the Guarantee and Collateral
                  Agreement to the extent necessary to cause 100% of the
                  outstanding Capital Stock of Viasystems Luxembourg S.a.r.l. to
                  be pledged thereunder, on terms and conditions satisfactory to
                  the Administrative Agent, duly executed and delivered by each
                  Credit Party party to the Guarantee and Collateral Agreement
                  and (ii) such documents and other instruments as the
                  Administrative Agent may reasonably request in connection with
                  the foregoing.


                                       5
<PAGE>


                  (c) Guarantee of Canadian Borrower Obligations. A guarantee of
                  the Foreign Subsidiary Obligations of the Canadian Borrower,
                  on terms and conditions satisfactory to the Administrative
                  Agent, duly executed and delivered by Viasystems Canada, G.P.

                  (d) Lender Consent Letters. Lender Consent Letters (or
                  facsimile transmissions thereof) in the form of Exhibit A,
                  duly executed and delivered by the Required Lenders consenting
                  to the execution of this Amendment by the Administrative
                  Agent.

                  (e) Fees. An amendment fee, for the account of the Lenders
                  that have delivered a Lender Consent Letter to the
                  Administrative Agent or its counsel no later than 5:00 p.m.,
                  New York City time, on March 27, 2002, in an amount equal to
                  0.25% of the aggregate amount of the Commitments in effect and
                  Term Loans outstanding of such Lenders.

                  (f) Expenses. Payment of all accrued amounts owing to the
                  Administrative Agent pursuant to subsection 17.5 of the Credit
                  Agreement.

                  SECTION 17. Continuing Effect of Credit Agreement. Except as
expressly amended herein, the Credit Agreement shall continue to be, and shall
remain, in full force and effect in accordance with its terms.

                  SECTION 18. Governing Law; Counterparts. THIS AMENDMENT AND
THE RIGHTS AND OBLIGATIONS OF THE PARTIES HERETO SHALL BE GOVERNED BY, AND
CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.
This Amendment may be executed by the parties hereto in any number of separate
counterparts, and all of said counterparts taken together shall be deemed to
constitute one and the same instrument. The execution and delivery of this
Amendment by any Lender shall be binding upon each of its successors and assigns
(including Transferees of its commitments and Loans in whole or in part prior to
effectiveness hereof) and binding in respect of all of its commitments and
Loans, including any acquired subsequent to its execution and delivery hereof
and prior to the effectiveness hereof.


                                       6
<PAGE>


                  IN WITNESS WHEREOF, the parties hereto have caused this
Amendment to be duly executed and delivered by their respective proper and duly
authorized officers as of the day and year first above written.

                                 VIASYSTEMS GROUP, INC.,
                                   as Guarantor


                                 By:     /s/ Kelly Wetzler
                                 Name:   Kelly Wetzler
                                 Title:  Assistant Secretary


                                 VIASYSTEMS, INC.,
                                   as US Borrower


                                 By:     /s/ Kelly Wetzler
                                 Name:   Kelly Wetzler
                                 Title:  Assistant Secretary


                                 VIASYSTEMS CANADA HOLDINGS, INC.,
                                   as Canadian Borrower


                                 By:     /s/ Kelly Wetzler
                                 Name:   Kelly Wetzler
                                 Title:  Assistant Secretary


                                 PRINT SERVICE HOLDING N.V.,
                                   as a Foreign Subsidiary Borrower


                                 By:     /s/ Kelly Wetzler
                                 Name:   Kelly Wetzler
                                 Title:  Assistant Secretary


<PAGE>



                                 JPMORGAN CHASE BANK,
                                   as Administrative Agent and Collateral Agent


                                 By:     /s/ Edmond DeForest
                                 Name:   Edmond DeForest
                                 Title:  Vice President