Crankshaft Position Sensor - 1AECS00021

Warranty & Shipping
Product Reviews
Vehicle Fit

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. Please ensure proper diagnosis of this item before purchasing as the item cannot be returned once installed or plugged in.

Item Condition: New

Attention California Customers:

WARNING:  This product can expose you to chemicals including Lead and Lead Compounds, which are known to the State of California to cause cancer, and birth defects or other reproductive harm.  For more information, go to

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.

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

Order must be placed by 4pm ET
Delivery options for:

Estimated Arrival Cost

Deliveries made to PO Boxes and FPO may take longer. See our Shipping & Delivery for more information.

Get it in: 2 - 4 Business Days

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