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In the 2006 Mercedes ML350, the crankshaft position sensor can be found on the backside of the engine close to the firewall on the driver's side, covered by a heat shield. This sensor sends crucial data to the ECU regarding the engine's crankshaft position and rotation speed. Along with the camshaft position sensor, which tracks the camshaft position and valve operation in the engine cylinders, it plays a vital role in the overall engine performance. Signs of a faulty crankshaft position sensor may include engine vibrations, decreased performance, stalling, misfiring of cylinders, and the Check Engine light coming on. A new sensor typically costs between $50 to $65 for parts and $90 to $105 for labor to replace it.
The 2006 Mercedes ML350's crankshaft position sensor is located under the engine, close to the timing cover.