Camshaft Position Sensor > CHEVROLET CAPTIVA (C140) 2.4L & MALIBU & BUICK / OPEL 2.4L (LE5/LE9 Ecotec) > 12577245 > GENUINE PART (GM Original Equipment)
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Genuine OEM Engine Component (General Motors/Chevrolet Original Equipment)
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Part Number: 12577245 (GM OE Number)
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Superseded Part: Note that this part number is sometimes superseded by 12674704 in later GM parts catalogs. When ordering, a dealer may provide the later revision.
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Component Name: Camshaft Position Sensor (CMP Sensor)
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Primary Applications: Vehicles equipped with the 2.4L Ecotec (LE5/LE9) engine, which includes:
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Chevrolet Captiva (C140 Chassis): 2.4L models (approx. 2011–2018).
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Chevrolet Malibu: 2.4L models (approx. 2007–2014).
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Chevrolet Equinox / Captiva Sport
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Buick Regal / LaCrosse
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Opel Antara (Captiva twin)
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Position: Typically mounted on the cylinder head. The 2.4L Ecotec engine often uses two of these sensors (Intake and Exhaust), and this part number is generally universal for both positions.
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Key Function: This sensor provides the Engine Control Module (ECM) with the exact position and speed of the camshaft, which is critical for accurate fuel injection, spark timing, and operating the Variable Valve Timing (VVT) system. A failing sensor can cause rough running, stalling, or a "crank but no start" condition.
This is a Genuine OEM Camshaft Position Sensor (CMP Sensor), identified by the General Motors (GM) part number 12577245. This component is a factory-original electrical sensor crucial for the operation of the 2.4L Ecotec engine found in several GM vehicles, including the Chevrolet Captiva (C140) and the Chevrolet Malibu.
The Camshaft Position Sensor is an essential part of the engine management system:
Engine Timing: It monitors the rotation of the camshafts (either intake or exhaust) and sends a signal to the ECM.
VVT Control: For Variable Valve Timing (VVT) engines, the ECM uses this signal, along with the Crankshaft Position Sensor signal, to precisely control the solenoid actuators that adjust valve timing for optimal power and efficiency.
Note on Quantity and Position: The 2.4L Ecotec engine utilizes a Dual Overhead Cam (DOHC) design and typically uses two of these sensors: one for the Intake camshaft and one for the Exhaust camshaft. The part number 12577245 (or its supersession 12674704) is generally the correct Genuine part for both positions.
Using the Genuine Part (12577245) ensures:
Precise Signal Accuracy: The sensor is manufactured to strict GM specifications, guaranteeing the correct signal output required by the ECM for accurate timing.
Guaranteed Fitment and Durability: Ensures the correct electrical connection and resistance to heat and oil exposure within the engine bay.
Compatible Vehicle (Primary Applications - Check VIN for confirmation):
Chevrolet Captiva (C140) 2.4L (approx. 2011–2018)
Chevrolet Malibu 2.4L (approx. 2007–2014)
Chevrolet Captiva Sport 2.4L
Chevrolet Equinox 2.4L
Buick Regal / LaCrosse 2.4L
Part Number:
✔ 12577245 (Camshaft Position Sensor - Genuine GM OE)
Supersedes to: 12674704
Opel Cross-Reference: 4803133
Part Type:
✔ Camshaft Position Sensor (CMP) (Genuine Part)
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