**Exhibit 31.1**
**CERTIFICATION**
I, Maynard L. Jenkins, certify that:
     1. I have reviewed this annual report on Form 10-K of CSK Auto Corporation;
     2. Based on my knowledge, this report does not contain any untrue statement of amaterial fact or omit to state a material fact necessary to make the statements made, inlight of the circumstances under which such statements were made, not misleading with respectto the period covered by this report;
     3. Based on my knowledge, the financial statements, and other financial informationincluded in this report, fairly present in all material respects the financial condition,results of operations and cash flows of the registrant as of, and for, the periods presentedin this report;
     4. The registrant’s other certifying officer and I are responsible for establishingand maintaining disclosure controls and procedures (as defined in Exchange Act Rules13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined inExchange Act Rules 13a – 15 (f) and 15d – 15(f)) for the registrant and have:
     a. Designed such disclosurecontrols and procedures, or caused suchdisclosure controls and procedures to bedesigned under our supervision, to ensurethat material information relating to theregistrant, including its consolidatedsubsidiaries, is made known to us by otherswithin those entities, particularly duringthe period in which this report is beingprepared
     b. Designed such internal controlover financial reporting, or caused suchinternal control over financial reportingto be designed under our supervision, toprovide reasonable assurance regarding thereliability of financial reporting and thepreparation of financial statements forexternal purposes in accordance withgenerally accepted accounting principles:
     c. Evaluated the effectiveness ofthe registrant’s disclosure controls andprocedures and presented in this report ourconclusions about the effectiveness of thedisclosure controls and procedures, as ofthe end of the period covered by thisreport based on such evaluation ; and
     d. Disclosed in this report anychange in the registrant’s internal controlover financial reporting that occurredduring the registrant’s most recent fiscalquarter that has materially affected, or isreasonably likely to materially affect, theregistrant’s internal control overfinancial reporting; and
     5. The registrant’s other certifying officer and I have disclosed, based on our mostrecent evaluation of internal control over financial reporting, to the registrant’s auditorsand the audit committee of the registrant’s board of directors (or persons performing theequivalent functions):
     a. All significant deficiencies andmaterial weaknesses in the design oroperation of internal control overfinancial reporting which are reasonablylikely to adversely affect the registrant’sability to record, process, summarize, andreport financial information ; and
     b. Any fraud, whether or notmaterial, that involves management or otheremployees who have a significant role inthe registrant’s internal control overfinancial reporting.    /s/ MAYNARD L. JENKINS   Maynard L. Jenkins *Chief Executive Officer*
May 2, 2005