<SUBMISSION>
<ACCESSION-NUMBER>0000950153-06-001582
<TYPE>NT 10-Q
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20060430
<FILING-DATE>20060612
<DATE-OF-FILING-DATE-CHANGE>20060612
<EFFECTIVENESS-DATE>20060612
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>CSK AUTO CORP
<CIK>0001051848
<ASSIGNED-SIC>5531
<IRS-NUMBER>860765798
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>0131
</COMPANY-DATA>
<FILING-VALUES>
<FORM-TYPE>NT 10-Q
<ACT>34
<FILE-NUMBER>001-13927
<FILM-NUMBER>06898873
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>645 E MISSOURI AVENUE
<CITY>PHOENIX
<STATE>AZ
<ZIP>85012
<PHONE>6022659200
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>645 E MISSOURI AVENUE
<CITY>PHOENIX
<STATE>AZ
<ZIP>85012
</MAIL-ADDRESS>
</FILER>
<DOCUMENT>
<TYPE>NT 10-Q
<SEQUENCE>1
<FILENAME>p72482ntnt10vq.htm
<DESCRIPTION>NT 10-Q
<TEXT>
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<TITLE>nt10vq</TITLE>
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<TD width="1%" style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
<TD align="center" valign="top" style="border-top: 1px solid #000000">OMB APPROVAL</TD>
<TD width="1%" style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
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<TD valign="top" style="border-top: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">OMB Number:&nbsp;3235-0058</DIV></TD>
<TD width="1%" style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD width="1%" style="border-left: 1px solid #000000">&nbsp;</TD>
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Expires:&nbsp;April&nbsp;30, 2009</DIV></TD>
<TD width="1%" style="border-right: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD width="1%" style="border-left: 1px solid #000000">&nbsp;</TD>
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Estimated average burden
hours per response ... 2.50</DIV></TD>
<TD width="1%" style="border-right: 1px solid #000000">&nbsp;</TD>
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<TD width="1%" style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
<TD align="center" valign="top" style="border-top: 1px solid #000000">SEC FILE NUMBER</TD>
<TD width="1%" style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
</TR>

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<TD width="1%" style="border-left: 1px solid #000000">&nbsp;</TD>
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
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<TD width="1%" style="border-left: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
<TD align="center" valign="top" style="border-top: 1px solid #000000">CUSIP NUMBER</TD>
<TD width="1%" style="border-right: 1px solid #000000; border-top: 1px solid #000000">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD width="1%" style="border-left: 1px solid #000000">&nbsp;</TD>
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
<TD width="1%" style="border-right: 1px solid #000000">&nbsp;</TD>
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</DIV>

<DIV align="center" style="font-size: 12pt; margin-top: 1pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION<BR>
Washington, D.C. 20549</B>
</DIV>

<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>FORM 12b-25</B>
</DIV>

<DIV align="right" style="font-size: 10pt; margin-top: 6pt">Commission
File Number: 001-13927</DIV>

<DIV align="center" style="font-size: 12pt; margin-top: 6pt"><B>NOTIFICATION OF LATE FILING</B>
</DIV>




<DIV align="center">
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<TD width="69%">&nbsp;</TD>
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<TR valign="bottom">
<TD nowrap valign="top"><I>(Check one):</I></TD>
<TD>&nbsp;</TD>
<TD colspan="4" valign="top" align="left">
<FONT face="wingdings">&#111;</FONT>&nbsp; Form&nbsp;10-K
<FONT face="wingdings">&#111;</FONT>&nbsp; Form&nbsp;20-F
<FONT face="wingdings">&#111;</FONT>&nbsp; Form&nbsp;11-K
<FONT face="wingdings">&#254;</FONT>&nbsp; Form&nbsp;10-Q
<FONT face="wingdings">&#111;</FONT>&nbsp; Form&nbsp;10-D
<FONT face="wingdings">&#111;</FONT>&nbsp; Form&nbsp;N-SAR
<FONT face="wingdings">&#111;</FONT>&nbsp; Form&nbsp;N-CSR
</TD>
</TR>
<TR valign="bottom" style="line-height: 6pt"><!-- Blank Space -->
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
<TD>&nbsp;</TD>
<TD nowrap align="left" valign="top">For Period Ended:</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top" colspan="2">April 30, 2006</TD>
</TR>
<TR style="font-size: 1px">
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD colspan="3" align="left" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>
<TR valign="bottom" style="line-height: 3pt"><!-- Blank Space -->
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD colspan="3" valign="top" align="left"><FONT face="wingdings">&#111;</FONT>&nbsp;&nbsp; Transition Report on Form&nbsp;10-K</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="line-height: 3pt"><!-- Blank Space -->
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD colspan="3" valign="top" align="left"><FONT face="wingdings">&#111;</FONT>&nbsp;&nbsp; Transition Report on Form&nbsp;20-F</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="line-height: 3pt"><!-- Blank Space -->
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD colspan="3" valign="top" align="left"><FONT face="wingdings">&#111;</FONT>&nbsp;&nbsp; Transition Report on Form&nbsp;11-K</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="line-height: 3pt"><!-- Blank Space -->
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD colspan="3" valign="top" align="left"><FONT face="wingdings">&#111;</FONT>&nbsp;&nbsp; Transition Report on Form&nbsp;10-Q</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="line-height: 3pt"><!-- Blank Space -->
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD nowrap colspan="3" valign="top" align="left"><FONT face="wingdings">&#111;</FONT>&nbsp;&nbsp; Transition Report on Form&nbsp;N-SAR</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom" style="line-height: 6pt"><!-- Blank Space -->
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
<TD>&nbsp;</TD>
<TD colspan="2" align="left" valign="top" nowrap>For the Transition Period Ended:
</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top"></TD>
<TD>&nbsp;</TD>
</TR>
<TR style="font-size: 1px">
<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD colspan="2" align="left" valign="top" style="border-top: 1px solid #000000">&nbsp;</TD>
</TR>
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</TABLE>
</DIV>
<P>
<DIV style="width: 100%; border: 1px solid black; padding: 12px;">

<DIV align="center" style="font-size: 10pt; margin-top: 6pt"><I>Read Instruction (on back page) Before Preparing Form. Please Print or Type.</I>
</DIV>

<DIV align="center" style="font-size: 10pt"><B>Nothing in this form shall be construed to imply that the Commission has verified any information contained herein.</B></DIV>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">If the notification relates to a portion of the filing checked above, identify the Item(s) to which
the notification relates:
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>PART I &#151; REGISTRANT INFORMATION</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 18pt">CSK Auto Corporation<DIV style="border-bottom: 1px solid #000000; font-size: 1px">&nbsp;</DIV>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 2pt">Full Name of Registrant
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 18pt"><DIV style="border-bottom: 1px solid #000000; font-size: 1px">&nbsp;</DIV>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 2pt">Former Name if Applicable
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 18pt">645 E. Missouri Ave. Suite 400<DIV style="border-bottom: 1px solid #000000; font-size: 1px">&nbsp;</DIV>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 2pt">Address of Principal Executive Office <I>(Street and Number)</I>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 18pt">Phoenix, Arizona 85012<DIV style="border-bottom: 1px solid #000000; font-size: 1px">&nbsp;</DIV>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 2pt">City, State and Zip Code
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>PART II &#151; RULES 12b-25(b) AND (c)</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule&nbsp;12b-25(b), the following should be completed. (Check box if appropriate)
</DIV>

<DIV align="center">
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<TD width="5%">&nbsp;</TD>
<TD width="1%">&nbsp;</TD><!-- VRule -->
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<TD width="88%">&nbsp;</TD>
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<TR valign="bottom">
<TD valign="middle" rowspan="5"><DIV style="margin-left:15px; text-indent:-0px"><FONT face="wingdings">&#111;</FONT></DIV></TD>
</TR>

<TR valign="bottom">
<TD style="border-right: 1px solid #000000">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">(a)
</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">The reason described in reasonable detail in Part III of this form could not be
eliminated without unreasonable effort or expense</TD>
</TR>


<TR valign="bottom" style="line-height: 3pt"><!-- Blank Space -->
<TD style="border-right: 1px solid #000000">&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD style="border-right: 1px solid #000000">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">(b)
</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">The subject annual report, semi-annual report, transition report
on Form&nbsp;10-K, Form&nbsp;20-F, Form&nbsp;11-K, Form&nbsp;N-SAR or
Form&nbsp;N-CSR, or portion thereof, will be filed on or before the fifteenth
calendar day following the prescribed due date; or the subject quarterly report
or transition report on Form&nbsp;10-Q or subject distribution report on Form&nbsp;10-D,
or portion thereof, will be filed on or before the fifth calendar day following the prescribed due
date; and </TD>
</TR>
<TR valign="bottom" style="line-height: 3pt"><!-- Blank Space -->
<TD style="border-right: 1px solid #000000">&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">&nbsp;</TD>
</TR>

<TR valign="bottom">
<TD>&nbsp;</TD>
<TD style="border-right: 1px solid #000000">&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">(c)
</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">The accountant&#146;s statement or other
exhibit required by Rule&nbsp;12b-25(c) has been attached if applicable.</TD>
</TR>
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</TABLE>
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>PART III &#151; NARRATIVE</B>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">State below in reasonable detail why
Forms 10-K, 20-F, 11-K, 10-Q, 10-D, N-SAR, N-CSR, or the transition report or portion thereof,
could not be filed within the prescribed time period.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">The
Company will not be able to file its Quarterly Report on Form&nbsp;10-Q
(&#147;First Quarter&nbsp;10-Q&#148;) for the quarterly period ended
April&nbsp;30, 2006 (&#147;first quarter fiscal 2006&#148;) by
June&nbsp;9, 2006, the prescribed
due date. The Company intends to file the First Quarter&nbsp;10-Q as promptly as practicable,
but does not expect that such filing will be made by its June&nbsp;14, 2006 extended deadline.

<P> The Company is unable to timely file its First Quarter&nbsp;10-Q
due to the Audit Committee-led internal investigation into certain accounting
errors and irregularities (the &#147;Investigation&#148;), as
previously disclosed on the Company&#146;s Current Report on
Form&nbsp;8-K
filed March&nbsp;27, 2006 and subsequent Current Reports on Form&nbsp;8-K.
Because the Investigation is ongoing, the Company has not yet filed
its Annual Report on Form&nbsp;10-K (the &#147;2005&nbsp;10-K&#148;) for the
fiscal year ended January&nbsp;29, 2006 (&#147;fiscal 2005&#148;).
The Company has previously stated that it expects that its financial
results for each of the two fiscal years 2003 and 2004, selected consolidated
financial data for each of the five fiscal years 2001 through 2005 and interim
financial information for each of its quarters in fiscal year 2004 and for the
first three quarters of fiscal 2005 will need to be restated in order to account
properly for the matters identified in connection with the Investigation. Accordingly,
as disclosed in our March&nbsp;27, 2006 Form&nbsp;8-K, the above previously issued
financial statements and information should no
longer be relied upon. Until the Investigation is completed, the Company will be
unable to complete its financial statements for the fourth quarter and full year fiscal 2005
and for first quarter fiscal 2006, as well as any necessary restatements, and the related
work on assessing its internal control over financial reporting under
Section&nbsp;404 of the
Sarbanes-Oxley Act of&nbsp;2002.

<P> The Company will be evaluating
whether any of the matters identified in the course of the Investigation were the result of one or
more material weaknesses in its internal controls in addition to those previously reported in
its fiscal 2004 Form&nbsp;10-K. Based on current information, the Company would expect to identify
additional material weaknesses in its internal controls at
January&nbsp;29, 2006. The Company will
conclude its evaluation and report its findings in this regard when
it files its fiscal 2005 Form&nbsp;10-K. </DIV>


<DIV align="left" style="margin-top: 12pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
<TD width="15%"></TD>
<TD width="1%"></TD>
<TD width="84"></TD>
</TR>
<TR valign="top">
<TD valign="middle" nowrap align="left">SEC 1344 (03-05)</TD>
<TD>&nbsp;</TD>
<TD><B>Persons who are to respond to the collection
of information contained in this form are not required
to respond unless the form displays a currently valid OMB control number.</B></TD>
</TR>
</TABLE>
</DIV>



<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<DIV style="font-size: 10pt; font-family: 'Times New Roman',Times,serif">




<DIV align="center" style="font-size: 10pt; margin-top: 6pt">(Attach extra Sheets if Needed)<BR>
<B>PART IV &#151; OTHER INFORMATION</B>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
<TD width="1%" nowrap align="left">(1)</TD>
<TD width="1%">&nbsp;</TD>
<TD>Name and telephone number of person to contact in regard to this notification</TD>
</TR>
</TABLE>
</DIV>
<DIV align="right">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="98%">
<!-- Begin Table Head -->
<TR valign="bottom">
<TD width="47%">&nbsp;</TD>
<TD width="5%">&nbsp;</TD>
<TD width="8%">&nbsp;</TD>
<TD width="5%">&nbsp;</TD>
<TD width="35%">&nbsp;</TD>
</TR>
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<TR style="font-size: 10pt">
<TD align="center" valign="top" style="border-bottom: 1px solid #000000">James B. Riley&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="center" valign="top" style="border-bottom: 1px solid #000000">(602)&nbsp;</TD>
<TD>&nbsp;</TD>
<TD align="center" valign="top" style="border-bottom: 1px solid #000000">631-7688&nbsp;</TD>
</TR>
<TR valign="bottom">
<TD valign="top" align="center"><DIV style="margin-left:0px; text-indent:-0px">(Name)</DIV></TD>
<TD>&nbsp;</TD>
<TD nowrap align="center" valign="bottom">(Area Code)
</TD>
<TD>&nbsp;</TD>
<TD align="center" valign="bottom">(Telephone Number)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
<TD width="1%" nowrap align="left">(2)</TD>
<TD width="1%">&nbsp;</TD>
<TD>Have all other periodic reports required under Section&nbsp;13 or 15(d) of the Securities Exchange Act of 1934 or Section&nbsp;30 of the Investment Company Act of 1940 during the preceding 12&nbsp;months or for such shorter period that the registrant was required to file such report(s) been filed? If answer is no, identify report(s).</TD>
</TR>
<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent; margin-top: 1pt">
<TD width="1%" nowrap align="left">&nbsp;</TD>
<TD width="1%">&nbsp;</TD>
<TD align="right">Yes&nbsp;<FONT face="wingdings">&#111;</FONT>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;No&nbsp;<FONT face="wingdings">&#254;</FONT></TD>
</TR>

<TR>
<TD style="font-size: 6pt">&nbsp;</TD>
</TR>

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
<TD width="1%" nowrap align="left">&nbsp;</TD>
<TD width="1%">&nbsp;</TD>
<TD><DIV style="border-bottom: 1px solid #000000; font-size: 10pt">As of the date of this filing, the Company has not filed its 2005 Form 10-K. &nbsp;</DIV></TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
<TD width="1%" nowrap align="left">(3)</TD>
<TD width="1%">&nbsp;</TD>
<TD>Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof?</TD>
</TR>
<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent; margin-top: 1pt">
<TD width="1%" nowrap align="left">&nbsp;</TD>
<TD width="1%">&nbsp;</TD>
<TD align="right">Yes&nbsp;<FONT face="wingdings">&#254;</FONT>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;No&nbsp;<FONT face="wingdings">&#111;</FONT></TD>
</TR>

<TR>
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<TD>If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.</TD>
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<TD><DIV style="border-bottom: 1px solid #000000; font-size: 10pt"><BR>In light of the ongoing Investigation, other than
certain preliminary financial results for first quarter fiscal 2006
reported in the Company&#146;s press release dated
May&nbsp;22, 2006 (&#147;Press Release&#148;) furnished as part of its
Current Report on Form&nbsp;8-K filed May&nbsp;23, 2006, the Company
is unable to complete its financial statements for first quarter
fiscal 2006. In the Company&#146;s Press Release, the
Company reported the following preliminary net sales results for first quarter fiscal 2006. Total sales for first
quarter fiscal 2006 were $454.1&nbsp;million compared to $397.2&nbsp;million for first quarter fiscal 2005. All of the increase
in first quarter fiscal 2006 sales was attributable to sales from
Murray&#146;s Discount Auto Stores (the &#147;Murray&#146;s stores&#148;),
which the Company acquired in December 2005. Excluding sales from the
Murray&#146;s stores, same store sales for first quarter
fiscal 2006 declined 2.3%, consisting of an increase of 5.6% in commercial same store sales and a decline
of 4.0% in retail same store sales. Such Press Release should also be referred to for certain
preliminary financial information for fiscal 2005 and the status of the Investigation.

<P> The foregoing reflects
the Company&#146;s views about the accounting adjustments, its financial condition, performance and other matters that
constitute &#147;forward-looking&#148; statements, as such term is defined by the federal securities laws. You can find many
of these statements by looking for words such as &#147;may,&#148; &#147;will,&#148; &#147;expect,&#148; &#147;anticipate,&#148; &#147;believe,&#148; &#147;estimate,&#148; &#147;should,&#148; &#147;continue,&#148; &#147;predict,&#148; &#147;preliminary&#148;
and similar words used herein. These forward-looking statements are subject to the safe harbor protection provided by
federal securities laws. These forward-looking statements are subject to numerous risks, uncertainties and assumptions.
These risks and uncertainties include, but are not limited to, the results and effect of the Investigation, any
potential Securities and Exchange&nbsp;Commission or New&nbsp;York
Stock&nbsp;Exchange inquiry with respect to the potential
adjustments or the Company&#146;s accounting practices, the ability of the Company to file its periodic reports,
the impact on the Company&#146;s business and the risks detailed from
time to time in the Company&#146;s periodic filings
under the Securities Exchange&nbsp;Act of&nbsp;1934. Because the statements are subject to risks and uncertainties,
actual developments and results may differ materially from those express or implied by the forward-looking statements.
Readers are cautioned not to place undue reliance on the statements, which speak only as of the date hereof.</DIV></TD>
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<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><DIV style="border-bottom: 3px solid #000000; font-size: 1px">&nbsp;</DIV>
</DIV>



<DIV align="center" style="font-size: 10pt; margin-top: 24pt"><DIV style="border-bottom: 1px solid #000000; font-size: 10pt; width: 75%">CSK Auto Corporation&nbsp;</DIV>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 2pt">(Name of Registrant as Specified in Charter)
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">has caused this notification to be signed on its behalf by the undersigned hereunto duly authorized.
</DIV>

<DIV align="center">
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<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">Date
</DIV></TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">June 12, 2006</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">By</TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top">/s/ James B. Riley</TD>
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<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
<TD>&nbsp;</TD>
<TD align="left" valign="top" style="border-top: 1px solid #000000">&nbsp;
</TD>
<TD>&nbsp;</TD>
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<TD>&nbsp;</TD>
<TD align="left" valign="top" style="border-top: 1px solid #000000"><DIV style="font-size: 10pt">James&nbsp;B.&nbsp;Riley<BR>Senior
Vice President<BR>Chief Financial Officer&nbsp;</DIV></TD>
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</DIV>


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