Replacing the camshaft position sensor B on a 2013 BMW 328i is a relatively simple procedure that can be completed in about an hour. This sensor is responsible for providing the engine control module with information about the position of the camshaft, which is essential for proper engine timing. A faulty camshaft position sensor can cause a variety of problems, including engine misfires, rough idling, and reduced power. Replacing a camshaft sensor generally costs $200-400.
The camshaft position sensor B is located on the rear of the engine, near the top of the cylinder head. To replace the sensor, you will need a new sensor, a 10mm socket wrench, and a flathead screwdriver.