                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                 SCHEDULE 13D/A
                   Under the Securities Exchange Act of 1934
                               (Amendment No. 1)*

                              CSK Auto Corporation
                            ------------------------
                                (Name of Issuer)

                    Common Stock, par value $0.01 per share
                    ----------------------------------------
                         (Title of Class of Securities)

                                   125965103
                                 (CUSIP Number)

                               Michael A. Karsch
                       c/o Karsch Capital Management, LP
                              110 East 59th Street
                                   22nd Floor
                               New York, NY 10022
                                 (212) 507-9782
                              --------------------
          (Name, Address, and Telephone Number of Person Authorized to
                      Receive Notices and Communications)

                                October 24, 2006
                                   ---------
            (Date of Event which Requires Filing of this Statement)


If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  that is the subject of this  Schedule  13D, and is filing this
schedule  because of Rule  13d-1(e),  13d-1(f) or 13d-1(g),  check the following
box. |_|

NOTE.  Schedules  filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule 13d-7 for other parties
to whom copies are to be sent.

*The  remainder of this cover page shall be filled out for a reporting  person's
initial filing on this form with respect to the subject class of securities, and
for  any  subsequent   amendment   containing   information  which  would  alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 or  otherwise  subject to the  liabilities  of that  section of the Act but
shall be subject to all other provisions of the Act (however, see the Notes).

<PAGE>

--------------------------------------------------------------------------------
CUSIP No. 125965103
--------------------------------------------------------------------------------
  1  NAME OF REPORTING PERSONS                     Karsch Capital Management, LP
  S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
--------------------------------------------------------------------------------
  2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*    (a) |_|
                                                          (b) |_|
--------------------------------------------------------------------------------
  3  SEC USE ONLY
--------------------------------------------------------------------------------
  4  SOURCE OF FUNDS*   AF
--------------------------------------------------------------------------------
  5  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
     REQUIRED PURSUANT TO ITEM 2(d) or 2(e)                   |_|
--------------------------------------------------------------------------------
  6  CITIZENSHIP OR PLACE OF ORGANIZATION                     Delaware
--------------------------------------------------------------------------------
NUMBER OF        7    SOLE VOTING POWER                       0
SHARES           --------------------------------------------------------------
BENEFICIALLY     8    SHARED VOTING POWER                    4,082,730
OWNED BY         --------------------------------------------------------------
THE              9    SOLE DISPOSITIVE POWER                  0
REPORTING        ---------------------------------------------------------------
PERSON WITH     10    SHARED DISPOSITIVE POWER               4,082,730
--------------------------------------------------------------------------------
 11    AGGREGATE AMOUNT BENEFICIALLY OWNED BY                4,082,730
       THE REPORTING PERSON
--------------------------------------------------------------------------------
 12    CHECK BOX IF THE AGREGATE AMOUNT IN ROW                |_|
       (11) EXCLUDES CERTAIN SHARES*
--------------------------------------------------------------------------------
 13    PERCENT OF CLASS REPRESENTED BY AMOUNT
       IN ROW (11)                                           9.3%
--------------------------------------------------------------------------------
 14    TYPE OF REPORTING PERSON*                            PN, IA
--------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT



                                      -2-

<PAGE>

--------------------------------------------------------------------------------
CUSIP No. 125965103
--------------------------------------------------------------------------------
  1  NAME OF REPORTING PERSONS                     Karsch Management GP, LLC
  S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
--------------------------------------------------------------------------------
  2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                          (a) |_|
                                                          (b) |_|
--------------------------------------------------------------------------------
  3  SEC USE ONLY
--------------------------------------------------------------------------------
  4  SOURCE OF FUNDS*     AF
--------------------------------------------------------------------------------
  5  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
     REQUIRED PURSUANT TO ITEM 2(d) or 2(e)                   |_|
--------------------------------------------------------------------------------
  6  CITIZENSHIP OR PLACE OF ORGANIZATION                     Delaware
--------------------------------------------------------------------------------
NUMBER OF         7    SOLE VOTING POWER                      0
SHARES           --------------------------------------------------------------
BENEFICIALLY      8    SHARED VOTING POWER                   4,082,730
OWNED BY         --------------------------------------------------------------
THE               9    SOLE DISPOSITIVE POWER                 0
REPORTING        --------------------------------------------------------------
PERSON WITH      10   SHARED DISPOSITIVE POWER               4,082,730
--------------------------------------------------------------------------------
 11    AGGREGATE AMOUNT BENEFICIALLY OWNED BY                4,082,730
       THE REPORTING PERSON
--------------------------------------------------------------------------------
 12    CHECK BOX IF THE AGREGATE AMOUNT IN ROW                |_|
       (11) EXCLUDES CERTAIN SHARES*
--------------------------------------------------------------------------------
 13    PERCENT OF CLASS REPRESENTED BY AMOUNT
       IN ROW (11)                                           9.3%
--------------------------------------------------------------------------------
 14    TYPE OF REPORTING PERSON*                             OO
--------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT



                                      -3-

<PAGE>

--------------------------------------------------------------------------------
CUSIP No. 125965103
--------------------------------------------------------------------------------
  1  NAME OF REPORTING PERSONS                     Michael A. Karsch
  S.S. or I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
--------------------------------------------------------------------------------
  2  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*

                                                          (a) |_|
                                                          (b) |_|
--------------------------------------------------------------------------------
  3  SEC USE ONLY
--------------------------------------------------------------------------------
  4  SOURCE OF FUNDS*     AF
--------------------------------------------------------------------------------
  5  CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
     REQUIRED PURSUANT TO ITEM 2(d) or 2(e)
                                                              |_|

--------------------------------------------------------------------------------
  6  CITIZENSHIP OR PLACE OF ORGANIZATION
                                                              United States
--------------------------------------------------------------------------------
NUMBER OF         7    SOLE VOTING POWER                      0
SHARES           --------------------------------------------------------------
BENEFICIALLY      8    SHARED VOTING POWER                   4,082,730
OWNED BY         --------------------------------------------------------------
THE               9    SOLE DISPOSITIVE POWER                 0
REPORTING        --------------------------------------------------------------
PERSON WITH      10    SHARED DISPOSITIVE POWER              4,082,730
-------------------------------------------------------------------------------
 11    AGGREGATE AMOUNT BENEFICIALLY OWNED BY                4,082,730
       THE REPORTING PERSON
-------------------------------------------------------------------------------
 12    CHECK BOX IF THE AGREGATE AMOUNT IN ROW                |_|
       (11) EXCLUDES CERTAIN SHARES*
-------------------------------------------------------------------------------
 13    PERCENT OF CLASS REPRESENTED BY AMOUNT
       IN ROW (11)                                           9.3%
-------------------------------------------------------------------------------
 14    TYPE OF REPORTING PERSON*                             IN
-------------------------------------------------------------------------------
                      *SEE INSTRUCTIONS BEFORE FILLING OUT



                                      -4-

<PAGE>

This Amendment No. 1 ("Amendment") amends the Schedule 13D filed on October 10,
2006 (the "Schedule 13D") by Karsch Capital Management, LP ("Karsch Capital"),
Karsch Management GP, LLC and Michael A. Karsch (collectively, the "Reporting
Persons") relating to the shares of common stock, par value $.01 per share, of
CSK Auto Corporation, a Delaware corporation (the "Issuer"), in the following
respects only:

ITEM 4.    PURPOSE OF TRANSACTION.

The securities of the Issuer covered by this Schedule 13D (the "Shares") were
originally acquired by Karsch Capital for purposes of investment in the ordinary
course of its business. Subsequently, Karsch Capital reevaluated the role it
intended to play with respect to the Issuer and has had a discussion with
management and a member of the Board of Directors of the Issuer (the "Board")
concerning various operational and financial aspects of the Issuer and various
ways of maximizing stockholder value. Karsch Capital believes that the Shares
are undervalued at their current market level and that the Issuer should
actively pursue a sale of the entire company once it has completed its pending
restatement of certain of its past financial statements and becomes current with
its SEC reporting obligations. Karsch Capital communicated that view to the
Board by letter dated October 9, 2006 which is attached to this Schedule 13D as
Exhibit 2.

On October 23, 2006, Karsch Capital sent a second letter to the Board requesting
that the Issuer include in its proxy materials for the next annual meeting of
stockholders a proposal that the company immediately hire an investment banking
firm to pursue a sale of the Issuer. While Karsch Capital acknowledges that it
has not held the Shares for more than one year such that it would be entitled to
have its proposal included in the Issuer's proxy materials, it requests that the
Board include the proposal in the Issuer's proxy materials voluntarily. A copy
of the letter dated October 23, 2006 from Karsch Capital to the Board is
attached to this Schedule 13D as Exhibit 3.

From time to time Karsch Capital, its management and representatives may have
other discussions with members of the Board, or with management, the full Board
and other stockholders of the Issuer concerning operational and financial
aspects of the Issuer and various ways of maximizing stockholder value. In
addition, Karsch Capital may make additional proposals to the Board, seek to
change the composition of and/or seek representation on the Board and solicit
proxies or written consents from other stockholders of the Issuer.

Karsch Capital intends to review on a continuing basis its investment in the
Issuer and its business, prospects and financial condition. Based on such
continuing review, alternative investment opportunities available to Karsch
Capital and all other factors deemed relevant, including, without limitation,
the market for and price of the Shares, offers for the Shares, general economic
conditions and other future developments, Karsch Capital may decide to sell or
seek the sale of all or part of the Shares or to increase its holdings of in the
Common Stock of the Issuer, engage in short selling of, or in hedging or similar
transactions with respect to, the Shares and/or otherwise change its intention
with respect to any and all matters referred to in this Item 4.

Except for the actions referred to in the preceding paragraphs of this Item,
Karsch Capital currently has no plans or proposals that would relate to or
result in of the consequences listed in paragraphs (a)-(j) of Item 4 of Schedule
13D.

ITEM 7.   MATERIAL TO BE FILED AS EXHIBITS.

Item 7 of Schedule 13D is hereby amended and restated as follows:


                                      -5-

<PAGE>

Exhibit 1 - Joint Filing Agreement (incorporated by reference to 1 of the
Schedule 13D)

Exhibit 2 - Letter dated October 9, 2006 from Karsch Capital to the Board of
Directors of CSK Auto Corporation (incorporated by reference to Exhibit 2 of the
Schedule 13D)

Exhibit 3 - Letter dated October 23, 2006 from Karsch Capital to the Board of
Directors of CSK Auto Corporation



                                      -6-



<PAGE>


                              S I G N A T U R E S

After reasonable 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:  October 24, 2006

KARSCH CAPITAL MANAGEMENT, LP                         KARSCH MANAGEMENT GP, LLC
By: Karsch Management GP, LLC
    General Partner

By:  /s/  Michael A. Karsch                        By:  /s/  Michael A. Karsch
     ---------------------                              ----------------------
     Michael A. Karsch                                  Michael A. Karsch
     Managing Member                                    Managing Member


     /s/  Michael A. Karsch
     ----------------------
     Michael A. Karsch



                                      -7-


