This replacement Crankshaft Position Sensor is just what you need to get your vehicle in good running condition again!

A bad or malfunctioning crank sensor will often cause a service engine light error code, and or cause a no start condition, or rough running due to inaccurate ignition and fuel timing.


  • Upper Sensor
  • Replaces dealer part numbers: 12559529, 12575481
  • Built to strict quality control standards
  • Direct replacement
  • 100% factory tested

Our electrical and electronic parts are subject to strict quality control testing .  Once the item has been installed or plugged in, it is no longer eligible for a refund.  The item may be eligible for replacement, only if it is found to have a manufacturing defect. Before purchasing, please ensure proper diagnosis of the failed original part is performed

Lifetime Warranty

This item is backed by a Limited Lifetime Warranty. In the event this item should fail due to manufacturing defects during intended use, we will exchange the part free of charge (excludes shipping charges) for the original purchaser. Please keep your invoice for proof of this warranty.

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Vehicle Fit

  • 2000-2005 Cadillac Deville Upper Crankshaft Position Sensor V8 4.6L
  • 2000-2002 Cadillac Eldorado Upper Crankshaft Position Sensor V8 4.6L
  • 2000-2004 Cadillac Seville Upper Crankshaft Position Sensor V8 4.6L
  • 2001-2003 Olds Aurora Upper Crankshaft Position Sensor V8 4.0L
  • 2004-2005 Pontiac Bonneville Upper Crankshaft Position Sensor V8 4.6L
Part #: 1AECS00021

Ships Same Day for orders placed by 4 P.M. ET

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Customer Feedback

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