2003 2.2 alero crankshaft sensor location?

The crankshaft position sensor (CKP) on a 2003 Pontiac Sunfire (the Alero and Sunfire share many components) 2.2L engine is located on the passenger side of the engine block, near the oil pan and transmission bellhousing. It's typically a single-wire sensor bolted directly to the engine block. You'll likely need to get under the car to access it clearly.

Important Note: Due to variations in engine placement and accessory layouts between model years and trim levels, you should double check your particular vehicle using a repair manual specific to your 2003 Pontiac Alero 2.2L. A visual diagram from a repair manual will be the most accurate way to locate the sensor. Searching online for "2003 Pontiac Alero 2.2L crankshaft position sensor location diagram" will yield helpful results.