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This is not a difficult repair. Below are instructions.
Camshaft Position Actuator Magnet Replacement Removal.
Tighten the bolts to 10 N·m (89 lb in).
The part is called the Camshaft actuator magnet. The magnet is the decive that controls the actuator on the end of the camshaft.
If the issue inside the camshaft actuator, then you need the camshaft sprocket and that is a hard job.
There is the magnet controller that bolts on the outside, and the actuator on the inside. THe outside magnet is the camshaft actuator magnet and the inside part, the device that actually moves the timing is the camshaft actuator.