CSK Auto
  | |
| Formerly | Northern Automotive (1987–1993) | 
| Founded | 1987 as Northern Automotive | 
| Defunct | July 11, 2008 (brands phased out and eliminated within 3 years of purchase) | 
| Fate | Acquired by O'Reilly Auto Parts | 
| Headquarters | Phoenix, Arizona, United States | 
Number of locations  | 1,349 (2008) | 
Area served  | Western United States | 
| Website | Archive of CSK Auto corporate site at the Wayback Machine (archived July 27, 2008) | 
CSK Auto, Inc. was a specialty retailer of automotive parts and accessories in the western United States. CSK Auto became a publicly traded company in March 1998, headquartered in Phoenix, Arizona, and grew through a combination of acquisitions and organic growth. It was acquired in 2008 by O'Reilly Automotive. The company took its name from the initials of its three auto parts chains, Checker Auto Parts, Kragen Auto Parts, and Schuck's Auto Supply.